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Auto merge of #80475 - simonvandel:fix-77355, r=oli-obk

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New mir-opt pass to simplify gotos with const values (reopening #77486)

Reopening PR #77486

Fixes #77355

This pass optimizes the following sequence
```rust
bb2: {
    _2 = const true;
    goto -> bb3;
}

bb3: {
    switchInt(_2) -> [false: bb4, otherwise: bb5];
}
```
into
```rust
bb2: {
    _2 = const true;
    goto -> bb5;
}
```
This commit is contained in:
bors 2021-02-24 07:23:54 +00:00
commit 6b56603e35
22 changed files with 652 additions and 374 deletions
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9
compiler/rustc_middle/src/mir/mod.rs
View File

@ -1518,7 +1518,14 @@ pub enum StatementKind<'tcx> {
}
impl<'tcx> StatementKind<'tcx> {
pub fn as_assign_mut(&mut self) -> Option<&mut Box<(Place<'tcx>, Rvalue<'tcx>)>> {
pub fn as_assign_mut(&mut self) -> Option<&mut (Place<'tcx>, Rvalue<'tcx>)> {
match self {
StatementKind::Assign(x) => Some(x),
_ => None,
}
}
pub fn as_assign(&self) -> Option<&(Place<'tcx>, Rvalue<'tcx>)> {
match self {
StatementKind::Assign(x) => Some(x),
_ => None,

16
compiler/rustc_middle/src/mir/terminator.rs
View File

@ -407,6 +407,22 @@ impl<'tcx> TerminatorKind<'tcx> {
| TerminatorKind::FalseUnwind { ref mut unwind, .. } => Some(unwind),
}
}
pub fn as_switch(&self) -> Option<(&Operand<'tcx>, Ty<'tcx>, &SwitchTargets)> {
match self {
TerminatorKind::SwitchInt { discr, switch_ty, targets } => {
Some((discr, switch_ty, targets))
}
_ => None,
}
}
pub fn as_goto(&self) -> Option<BasicBlock> {
match self {
TerminatorKind::Goto { target } => Some(*target),
_ => None,
}
}
}
impl<'tcx> Debug for TerminatorKind<'tcx> {

1
compiler/rustc_mir/src/interpret/operand.rs
View File

@ -514,6 +514,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
/// Evaluate the operand, returning a place where you can then find the data.
/// If you already know the layout, you can save two table lookups
/// by passing it in here.
#[inline]
pub fn eval_operand(
&self,
mir_op: &mir::Operand<'tcx>,

122
compiler/rustc_mir/src/transform/const_goto.rs Normal file
View File

@ -0,0 +1,122 @@
//! This pass optimizes the following sequence
//! ```rust,ignore (example)
//! bb2: {
//! _2 = const true;
//! goto -> bb3;
//! }
//!
//! bb3: {
//! switchInt(_2) -> [false: bb4, otherwise: bb5];
//! }
//! ```
//! into
//! ```rust,ignore (example)
//! bb2: {
//! _2 = const true;
//! goto -> bb5;
//! }
//! ```
use crate::transform::MirPass;
use rustc_middle::mir::*;
use rustc_middle::ty::TyCtxt;
use rustc_middle::{mir::visit::Visitor, ty::ParamEnv};
use super::simplify::{simplify_cfg, simplify_locals};
pub struct ConstGoto;
impl<'tcx> MirPass<'tcx> for ConstGoto {
fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
if tcx.sess.opts.debugging_opts.mir_opt_level < 3 {
return;
}
trace!("Running ConstGoto on {:?}", body.source);
let param_env = tcx.param_env_reveal_all_normalized(body.source.def_id());
let mut opt_finder =
ConstGotoOptimizationFinder { tcx, body, optimizations: vec![], param_env };
opt_finder.visit_body(body);
let should_simplify = !opt_finder.optimizations.is_empty();
for opt in opt_finder.optimizations {
let terminator = body.basic_blocks_mut()[opt.bb_with_goto].terminator_mut();
let new_goto = TerminatorKind::Goto { target: opt.target_to_use_in_goto };
debug!("SUCCESS: replacing `{:?}` with `{:?}`", terminator.kind, new_goto);
terminator.kind = new_goto;
}
// if we applied optimizations, we potentially have some cfg to cleanup to
// make it easier for further passes
if should_simplify {
simplify_cfg(body);
simplify_locals(body, tcx);
}
}
}
impl<'a, 'tcx> Visitor<'tcx> for ConstGotoOptimizationFinder<'a, 'tcx> {
fn visit_terminator(&mut self, terminator: &Terminator<'tcx>, location: Location) {
let _: Option<_> = try {
let target = terminator.kind.as_goto()?;
// We only apply this optimization if the last statement is a const assignment
let last_statement = self.body.basic_blocks()[location.block].statements.last()?;
if let (place, Rvalue::Use(Operand::Constant(_const))) =
last_statement.kind.as_assign()?
{
// We found a constant being assigned to `place`.
// Now check that the target of this Goto switches on this place.
let target_bb = &self.body.basic_blocks()[target];
// FIXME(simonvandel): We are conservative here when we don't allow
// any statements in the target basic block.
// This could probably be relaxed to allow `StorageDead`s which could be
// copied to the predecessor of this block.
if !target_bb.statements.is_empty() {
None?
}
let target_bb_terminator = target_bb.terminator();
let (discr, switch_ty, targets) = target_bb_terminator.kind.as_switch()?;
if discr.place() == Some(*place) {
// We now know that the Switch matches on the const place, and it is statementless
// Now find which value in the Switch matches the const value.
let const_value =
_const.literal.try_eval_bits(self.tcx, self.param_env, switch_ty)?;
let found_value_idx_option = targets
.iter()
.enumerate()
.find(|(_, (value, _))| const_value == *value)
.map(|(idx, _)| idx);
let target_to_use_in_goto =
if let Some(found_value_idx) = found_value_idx_option {
targets.iter().nth(found_value_idx).unwrap().1
} else {
// If we did not find the const value in values, it must be the otherwise case
targets.otherwise()
};
self.optimizations.push(OptimizationToApply {
bb_with_goto: location.block,
target_to_use_in_goto,
});
}
}
Some(())
};
self.super_terminator(terminator, location);
}
}
struct OptimizationToApply {
bb_with_goto: BasicBlock,
target_to_use_in_goto: BasicBlock,
}
pub struct ConstGotoOptimizationFinder<'a, 'tcx> {
tcx: TyCtxt<'tcx>,
body: &'a Body<'tcx>,
param_env: ParamEnv<'tcx>,
optimizations: Vec<OptimizationToApply>,
}

2
compiler/rustc_mir/src/transform/mod.rs
View File

@ -22,6 +22,7 @@ pub mod check_packed_ref;
pub mod check_unsafety;
pub mod cleanup_post_borrowck;
pub mod const_debuginfo;
pub mod const_goto;
pub mod const_prop;
pub mod coverage;
pub mod deaggregator;
@ -492,6 +493,7 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
// The main optimizations that we do on MIR.
let optimizations: &[&dyn MirPass<'tcx>] = &[
&const_goto::ConstGoto,
&remove_unneeded_drops::RemoveUnneededDrops,
&match_branches::MatchBranchSimplification,
// inst combine is after MatchBranchSimplification to clean up Ne(_1, false)

37
compiler/rustc_mir/src/transform/simplify.rs
View File

@ -320,28 +320,31 @@ pub struct SimplifyLocals;
impl<'tcx> MirPass<'tcx> for SimplifyLocals {
fn run_pass(&self, tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
trace!("running SimplifyLocals on {:?}", body.source);
simplify_locals(body, tcx);
}
}
// First, we're going to get a count of *actual* uses for every `Local`.
let mut used_locals = UsedLocals::new(body);
pub fn simplify_locals<'tcx>(body: &mut Body<'tcx>, tcx: TyCtxt<'tcx>) {
// First, we're going to get a count of *actual* uses for every `Local`.
let mut used_locals = UsedLocals::new(body);
// Next, we're going to remove any `Local` with zero actual uses. When we remove those
// `Locals`, we're also going to subtract any uses of other `Locals` from the `used_locals`
// count. For example, if we removed `_2 = discriminant(_1)`, then we'll subtract one from
// `use_counts[_1]`. That in turn might make `_1` unused, so we loop until we hit a
// fixedpoint where there are no more unused locals.
remove_unused_definitions(&mut used_locals, body);
// Next, we're going to remove any `Local` with zero actual uses. When we remove those
// `Locals`, we're also going to subtract any uses of other `Locals` from the `used_locals`
// count. For example, if we removed `_2 = discriminant(_1)`, then we'll subtract one from
// `use_counts[_1]`. That in turn might make `_1` unused, so we loop until we hit a
// fixedpoint where there are no more unused locals.
remove_unused_definitions(&mut used_locals, body);
// Finally, we'll actually do the work of shrinking `body.local_decls` and remapping the `Local`s.
let map = make_local_map(&mut body.local_decls, &used_locals);
// Finally, we'll actually do the work of shrinking `body.local_decls` and remapping the `Local`s.
let map = make_local_map(&mut body.local_decls, &used_locals);
// Only bother running the `LocalUpdater` if we actually found locals to remove.
if map.iter().any(Option::is_none) {
// Update references to all vars and tmps now
let mut updater = LocalUpdater { map, tcx };
updater.visit_body(body);
// Only bother running the `LocalUpdater` if we actually found locals to remove.
if map.iter().any(Option::is_none) {
// Update references to all vars and tmps now
let mut updater = LocalUpdater { map, tcx };
updater.visit_body(body);
body.local_decls.shrink_to_fit();
}
body.local_decls.shrink_to_fit();
}
}

2
compiler/rustc_mir/src/transform/simplify_comparison_integral.rs
View File

@ -80,7 +80,7 @@ impl<'tcx> MirPass<'tcx> for SimplifyComparisonIntegral {
// we convert the move in the comparison statement to a copy.
// unwrap is safe as we know this statement is an assign
let box (_, rhs) = bb.statements[opt.bin_op_stmt_idx].kind.as_assign_mut().unwrap();
let (_, rhs) = bb.statements[opt.bin_op_stmt_idx].kind.as_assign_mut().unwrap();
use Operand::*;
match rhs {

52
src/test/mir-opt/const_goto.issue_77355_opt.ConstGoto.diff Normal file
View File

@ -0,0 +1,52 @@
- // MIR for `issue_77355_opt` before ConstGoto
+ // MIR for `issue_77355_opt` after ConstGoto
fn issue_77355_opt(_1: Foo) -> u64 {
debug num => _1; // in scope 0 at $DIR/const_goto.rs:11:20: 11:23
let mut _0: u64; // return place in scope 0 at $DIR/const_goto.rs:11:33: 11:36
- let mut _2: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- let mut _3: isize; // in scope 0 at $DIR/const_goto.rs:12:22: 12:28
+ let mut _2: isize; // in scope 0 at $DIR/const_goto.rs:12:22: 12:28
bb0: {
- StorageLive(_2); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- _3 = discriminant(_1); // scope 0 at $DIR/const_goto.rs:12:22: 12:28
- switchInt(move _3) -> [1_isize: bb2, 2_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/const_goto.rs:12:22: 12:28
+ _2 = discriminant(_1); // scope 0 at $DIR/const_goto.rs:12:22: 12:28
+ switchInt(move _2) -> [1_isize: bb2, 2_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/const_goto.rs:12:22: 12:28
}
bb1: {
- _2 = const false; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
+ _0 = const 42_u64; // scope 0 at $DIR/const_goto.rs:12:53: 12:55
+ goto -> bb3; // scope 0 at $DIR/const_goto.rs:12:5: 12:57
}
bb2: {
- _2 = const true; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- }
-
- bb3: {
- switchInt(move _2) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/const_goto.rs:12:5: 12:57
- }
-
- bb4: {
_0 = const 23_u64; // scope 0 at $DIR/const_goto.rs:12:41: 12:43
- goto -> bb6; // scope 0 at $DIR/const_goto.rs:12:5: 12:57
+ goto -> bb3; // scope 0 at $DIR/const_goto.rs:12:5: 12:57
}
- bb5: {
- _0 = const 42_u64; // scope 0 at $DIR/const_goto.rs:12:53: 12:55
- goto -> bb6; // scope 0 at $DIR/const_goto.rs:12:5: 12:57
- }
-
- bb6: {
- StorageDead(_2); // scope 0 at $DIR/const_goto.rs:12:56: 12:57
+ bb3: {
return; // scope 0 at $DIR/const_goto.rs:13:2: 13:2
}
}

16
src/test/mir-opt/const_goto.rs Normal file
View File

@ -0,0 +1,16 @@
pub enum Foo {
A,
B,
C,
D,
E,
F,
}
// EMIT_MIR const_goto.issue_77355_opt.ConstGoto.diff
fn issue_77355_opt(num: Foo) -> u64 {
if matches!(num, Foo::B | Foo::C) { 23 } else { 42 }
}
fn main() {
issue_77355_opt(Foo::A);
}

51
src/test/mir-opt/const_goto_const_eval_fail.f.ConstGoto.diff Normal file
View File

@ -0,0 +1,51 @@
- // MIR for `f` before ConstGoto
+ // MIR for `f` after ConstGoto
fn f() -> u64 {
let mut _0: u64; // return place in scope 0 at $DIR/const_goto_const_eval_fail.rs:6:44: 6:47
let mut _1: bool; // in scope 0 at $DIR/const_goto_const_eval_fail.rs:7:11: 12:6
let mut _2: i32; // in scope 0 at $DIR/const_goto_const_eval_fail.rs:8:15: 8:16
bb0: {
StorageLive(_1); // scope 0 at $DIR/const_goto_const_eval_fail.rs:7:11: 12:6
StorageLive(_2); // scope 0 at $DIR/const_goto_const_eval_fail.rs:8:15: 8:16
_2 = const A; // scope 0 at $DIR/const_goto_const_eval_fail.rs:8:15: 8:16
switchInt(_2) -> [1_i32: bb2, 2_i32: bb2, 3_i32: bb2, otherwise: bb1]; // scope 0 at $DIR/const_goto_const_eval_fail.rs:9:13: 9:14
}
bb1: {
_1 = const true; // scope 0 at $DIR/const_goto_const_eval_fail.rs:10:18: 10:22
goto -> bb3; // scope 0 at $DIR/const_goto_const_eval_fail.rs:8:9: 11:10
}
bb2: {
_1 = const B; // scope 0 at $DIR/const_goto_const_eval_fail.rs:9:26: 9:27
- goto -> bb3; // scope 0 at $DIR/const_goto_const_eval_fail.rs:8:9: 11:10
+ switchInt(_1) -> [false: bb4, otherwise: bb3]; // scope 0 at $DIR/const_goto_const_eval_fail.rs:13:9: 13:14
}
bb3: {
- switchInt(_1) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/const_goto_const_eval_fail.rs:13:9: 13:14
- }
-
- bb4: {
_0 = const 2_u64; // scope 0 at $DIR/const_goto_const_eval_fail.rs:14:17: 14:18
- goto -> bb6; // scope 0 at $DIR/const_goto_const_eval_fail.rs:7:5: 15:6
+ goto -> bb5; // scope 0 at $DIR/const_goto_const_eval_fail.rs:7:5: 15:6
}
- bb5: {
+ bb4: {
_0 = const 1_u64; // scope 0 at $DIR/const_goto_const_eval_fail.rs:13:18: 13:19
- goto -> bb6; // scope 0 at $DIR/const_goto_const_eval_fail.rs:7:5: 15:6
+ goto -> bb5; // scope 0 at $DIR/const_goto_const_eval_fail.rs:7:5: 15:6
}
- bb6: {
+ bb5: {
StorageDead(_2); // scope 0 at $DIR/const_goto_const_eval_fail.rs:16:1: 16:2
StorageDead(_1); // scope 0 at $DIR/const_goto_const_eval_fail.rs:16:1: 16:2
return; // scope 0 at $DIR/const_goto_const_eval_fail.rs:16:2: 16:2
}
}

16
src/test/mir-opt/const_goto_const_eval_fail.rs Normal file
View File

@ -0,0 +1,16 @@
#![feature(min_const_generics)]
#![crate_type = "lib"]
// If const eval fails, then don't crash
// EMIT_MIR const_goto_const_eval_fail.f.ConstGoto.diff
pub fn f<const A: i32, const B: bool>() -> u64 {
match {
match A {
1 | 2 | 3 => B,
_ => true,
}
} {
false => 1,
true => 2,
}
}

118
src/test/mir-opt/matches_reduce_branches.bar.MatchBranchSimplification.32bit.diff
View File

@ -2,84 +2,84 @@
+ // MIR for `bar` after MatchBranchSimplification
fn bar(_1: i32) -> (bool, bool, bool, bool) {
debug i => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:12:8: 12:9
let mut _0: (bool, bool, bool, bool); // return place in scope 0 at $DIR/matches_reduce_branches.rs:12:19: 12:43
let _2: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:13:9: 13:10
let _6: (); // in scope 0 at $DIR/matches_reduce_branches.rs:18:5: 33:6
let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:6: 35:7
let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:9: 35:10
let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:12: 35:13
let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:15: 35:16
+ let mut _11: i32; // in scope 0 at $DIR/matches_reduce_branches.rs:19:9: 19:10
debug i => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:13:8: 13:9
let mut _0: (bool, bool, bool, bool); // return place in scope 0 at $DIR/matches_reduce_branches.rs:13:19: 13:43
let _2: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:14:9: 14:10
let _6: (); // in scope 0 at $DIR/matches_reduce_branches.rs:19:5: 34:6
let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:6: 36:7
let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:9: 36:10
let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:12: 36:13
let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:15: 36:16
+ let mut _11: i32; // in scope 0 at $DIR/matches_reduce_branches.rs:20:9: 20:10
scope 1 {
debug a => _2; // in scope 1 at $DIR/matches_reduce_branches.rs:13:9: 13:10
let _3: bool; // in scope 1 at $DIR/matches_reduce_branches.rs:14:9: 14:10
debug a => _2; // in scope 1 at $DIR/matches_reduce_branches.rs:14:9: 14:10
let _3: bool; // in scope 1 at $DIR/matches_reduce_branches.rs:15:9: 15:10
scope 2 {
debug b => _3; // in scope 2 at $DIR/matches_reduce_branches.rs:14:9: 14:10
let _4: bool; // in scope 2 at $DIR/matches_reduce_branches.rs:15:9: 15:10
debug b => _3; // in scope 2 at $DIR/matches_reduce_branches.rs:15:9: 15:10
let _4: bool; // in scope 2 at $DIR/matches_reduce_branches.rs:16:9: 16:10
scope 3 {
debug c => _4; // in scope 3 at $DIR/matches_reduce_branches.rs:15:9: 15:10
let _5: bool; // in scope 3 at $DIR/matches_reduce_branches.rs:16:9: 16:10
debug c => _4; // in scope 3 at $DIR/matches_reduce_branches.rs:16:9: 16:10
let _5: bool; // in scope 3 at $DIR/matches_reduce_branches.rs:17:9: 17:10
scope 4 {
debug d => _5; // in scope 4 at $DIR/matches_reduce_branches.rs:16:9: 16:10
debug d => _5; // in scope 4 at $DIR/matches_reduce_branches.rs:17:9: 17:10
}
}
}
}
bb0: {
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:13:9: 13:10
StorageLive(_3); // scope 1 at $DIR/matches_reduce_branches.rs:14:9: 14:10
StorageLive(_4); // scope 2 at $DIR/matches_reduce_branches.rs:15:9: 15:10
StorageLive(_5); // scope 3 at $DIR/matches_reduce_branches.rs:16:9: 16:10
StorageLive(_6); // scope 4 at $DIR/matches_reduce_branches.rs:18:5: 33:6
- switchInt(_1) -> [7_i32: bb2, otherwise: bb1]; // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:14:9: 14:10
StorageLive(_3); // scope 1 at $DIR/matches_reduce_branches.rs:15:9: 15:10
StorageLive(_4); // scope 2 at $DIR/matches_reduce_branches.rs:16:9: 16:10
StorageLive(_5); // scope 3 at $DIR/matches_reduce_branches.rs:17:9: 17:10
StorageLive(_6); // scope 4 at $DIR/matches_reduce_branches.rs:19:5: 34:6
- switchInt(_1) -> [7_i32: bb2, otherwise: bb1]; // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
- }
-
- bb1: {
- _2 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:27:13: 27:21
- _3 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:28:13: 28:22
- _4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:29:13: 29:22
- _5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:30:13: 30:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:18:5: 33:6
- _2 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:28:13: 28:21
- _3 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:29:13: 29:22
- _4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:30:13: 30:22
- _5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:31:13: 31:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:19:5: 34:6
- }
-
- bb2: {
- _2 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:20:13: 20:22
- _3 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:21
+ StorageLive(_11); // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
+ _11 = _1; // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
+ _2 = Ne(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:20:13: 20:22
+ _3 = Eq(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:21
_4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:22:13: 22:22
_5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:23:13: 23:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:18:5: 33:6
- _2 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:22
- _3 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:22:13: 22:21
+ StorageLive(_11); // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
+ _11 = _1; // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
+ _2 = Ne(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:22
+ _3 = Eq(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:22:13: 22:21
_4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:23:13: 23:22
_5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:24:13: 24:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:19:5: 34:6
- }
-
- bb3: {
+ StorageDead(_11); // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
StorageDead(_6); // scope 4 at $DIR/matches_reduce_branches.rs:33:6: 33:7
StorageLive(_7); // scope 4 at $DIR/matches_reduce_branches.rs:35:6: 35:7
_7 = _2; // scope 4 at $DIR/matches_reduce_branches.rs:35:6: 35:7
StorageLive(_8); // scope 4 at $DIR/matches_reduce_branches.rs:35:9: 35:10
_8 = _3; // scope 4 at $DIR/matches_reduce_branches.rs:35:9: 35:10
StorageLive(_9); // scope 4 at $DIR/matches_reduce_branches.rs:35:12: 35:13
_9 = _4; // scope 4 at $DIR/matches_reduce_branches.rs:35:12: 35:13
StorageLive(_10); // scope 4 at $DIR/matches_reduce_branches.rs:35:15: 35:16
_10 = _5; // scope 4 at $DIR/matches_reduce_branches.rs:35:15: 35:16
(_0.0: bool) = move _7; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
(_0.1: bool) = move _8; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
(_0.2: bool) = move _9; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
(_0.3: bool) = move _10; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
StorageDead(_10); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_9); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_8); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_7); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_5); // scope 3 at $DIR/matches_reduce_branches.rs:36:1: 36:2
StorageDead(_4); // scope 2 at $DIR/matches_reduce_branches.rs:36:1: 36:2
StorageDead(_3); // scope 1 at $DIR/matches_reduce_branches.rs:36:1: 36:2
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:36:1: 36:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:36:2: 36:2
+ StorageDead(_11); // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
StorageDead(_6); // scope 4 at $DIR/matches_reduce_branches.rs:34:6: 34:7
StorageLive(_7); // scope 4 at $DIR/matches_reduce_branches.rs:36:6: 36:7
_7 = _2; // scope 4 at $DIR/matches_reduce_branches.rs:36:6: 36:7
StorageLive(_8); // scope 4 at $DIR/matches_reduce_branches.rs:36:9: 36:10
_8 = _3; // scope 4 at $DIR/matches_reduce_branches.rs:36:9: 36:10
StorageLive(_9); // scope 4 at $DIR/matches_reduce_branches.rs:36:12: 36:13
_9 = _4; // scope 4 at $DIR/matches_reduce_branches.rs:36:12: 36:13
StorageLive(_10); // scope 4 at $DIR/matches_reduce_branches.rs:36:15: 36:16
_10 = _5; // scope 4 at $DIR/matches_reduce_branches.rs:36:15: 36:16
(_0.0: bool) = move _7; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
(_0.1: bool) = move _8; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
(_0.2: bool) = move _9; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
(_0.3: bool) = move _10; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
StorageDead(_10); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_9); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_8); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_7); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_5); // scope 3 at $DIR/matches_reduce_branches.rs:37:1: 37:2
StorageDead(_4); // scope 2 at $DIR/matches_reduce_branches.rs:37:1: 37:2
StorageDead(_3); // scope 1 at $DIR/matches_reduce_branches.rs:37:1: 37:2
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:37:1: 37:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:37:2: 37:2
}
}

118
src/test/mir-opt/matches_reduce_branches.bar.MatchBranchSimplification.64bit.diff
View File

@ -2,84 +2,84 @@
+ // MIR for `bar` after MatchBranchSimplification
fn bar(_1: i32) -> (bool, bool, bool, bool) {
debug i => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:12:8: 12:9
let mut _0: (bool, bool, bool, bool); // return place in scope 0 at $DIR/matches_reduce_branches.rs:12:19: 12:43
let _2: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:13:9: 13:10
let _6: (); // in scope 0 at $DIR/matches_reduce_branches.rs:18:5: 33:6
let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:6: 35:7
let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:9: 35:10
let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:12: 35:13
let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:35:15: 35:16
+ let mut _11: i32; // in scope 0 at $DIR/matches_reduce_branches.rs:19:9: 19:10
debug i => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:13:8: 13:9
let mut _0: (bool, bool, bool, bool); // return place in scope 0 at $DIR/matches_reduce_branches.rs:13:19: 13:43
let _2: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:14:9: 14:10
let _6: (); // in scope 0 at $DIR/matches_reduce_branches.rs:19:5: 34:6
let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:6: 36:7
let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:9: 36:10
let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:12: 36:13
let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:36:15: 36:16
+ let mut _11: i32; // in scope 0 at $DIR/matches_reduce_branches.rs:20:9: 20:10
scope 1 {
debug a => _2; // in scope 1 at $DIR/matches_reduce_branches.rs:13:9: 13:10
let _3: bool; // in scope 1 at $DIR/matches_reduce_branches.rs:14:9: 14:10
debug a => _2; // in scope 1 at $DIR/matches_reduce_branches.rs:14:9: 14:10
let _3: bool; // in scope 1 at $DIR/matches_reduce_branches.rs:15:9: 15:10
scope 2 {
debug b => _3; // in scope 2 at $DIR/matches_reduce_branches.rs:14:9: 14:10
let _4: bool; // in scope 2 at $DIR/matches_reduce_branches.rs:15:9: 15:10
debug b => _3; // in scope 2 at $DIR/matches_reduce_branches.rs:15:9: 15:10
let _4: bool; // in scope 2 at $DIR/matches_reduce_branches.rs:16:9: 16:10
scope 3 {
debug c => _4; // in scope 3 at $DIR/matches_reduce_branches.rs:15:9: 15:10
let _5: bool; // in scope 3 at $DIR/matches_reduce_branches.rs:16:9: 16:10
debug c => _4; // in scope 3 at $DIR/matches_reduce_branches.rs:16:9: 16:10
let _5: bool; // in scope 3 at $DIR/matches_reduce_branches.rs:17:9: 17:10
scope 4 {
debug d => _5; // in scope 4 at $DIR/matches_reduce_branches.rs:16:9: 16:10
debug d => _5; // in scope 4 at $DIR/matches_reduce_branches.rs:17:9: 17:10
}
}
}
}
bb0: {
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:13:9: 13:10
StorageLive(_3); // scope 1 at $DIR/matches_reduce_branches.rs:14:9: 14:10
StorageLive(_4); // scope 2 at $DIR/matches_reduce_branches.rs:15:9: 15:10
StorageLive(_5); // scope 3 at $DIR/matches_reduce_branches.rs:16:9: 16:10
StorageLive(_6); // scope 4 at $DIR/matches_reduce_branches.rs:18:5: 33:6
- switchInt(_1) -> [7_i32: bb2, otherwise: bb1]; // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:14:9: 14:10
StorageLive(_3); // scope 1 at $DIR/matches_reduce_branches.rs:15:9: 15:10
StorageLive(_4); // scope 2 at $DIR/matches_reduce_branches.rs:16:9: 16:10
StorageLive(_5); // scope 3 at $DIR/matches_reduce_branches.rs:17:9: 17:10
StorageLive(_6); // scope 4 at $DIR/matches_reduce_branches.rs:19:5: 34:6
- switchInt(_1) -> [7_i32: bb2, otherwise: bb1]; // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
- }
-
- bb1: {
- _2 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:27:13: 27:21
- _3 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:28:13: 28:22
- _4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:29:13: 29:22
- _5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:30:13: 30:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:18:5: 33:6
- _2 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:28:13: 28:21
- _3 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:29:13: 29:22
- _4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:30:13: 30:22
- _5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:31:13: 31:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:19:5: 34:6
- }
-
- bb2: {
- _2 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:20:13: 20:22
- _3 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:21
+ StorageLive(_11); // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
+ _11 = _1; // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
+ _2 = Ne(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:20:13: 20:22
+ _3 = Eq(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:21
_4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:22:13: 22:22
_5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:23:13: 23:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:18:5: 33:6
- _2 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:22
- _3 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:22:13: 22:21
+ StorageLive(_11); // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
+ _11 = _1; // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
+ _2 = Ne(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:21:13: 21:22
+ _3 = Eq(_11, const 7_i32); // scope 4 at $DIR/matches_reduce_branches.rs:22:13: 22:21
_4 = const false; // scope 4 at $DIR/matches_reduce_branches.rs:23:13: 23:22
_5 = const true; // scope 4 at $DIR/matches_reduce_branches.rs:24:13: 24:21
- goto -> bb3; // scope 4 at $DIR/matches_reduce_branches.rs:19:5: 34:6
- }
-
- bb3: {
+ StorageDead(_11); // scope 4 at $DIR/matches_reduce_branches.rs:19:9: 19:10
StorageDead(_6); // scope 4 at $DIR/matches_reduce_branches.rs:33:6: 33:7
StorageLive(_7); // scope 4 at $DIR/matches_reduce_branches.rs:35:6: 35:7
_7 = _2; // scope 4 at $DIR/matches_reduce_branches.rs:35:6: 35:7
StorageLive(_8); // scope 4 at $DIR/matches_reduce_branches.rs:35:9: 35:10
_8 = _3; // scope 4 at $DIR/matches_reduce_branches.rs:35:9: 35:10
StorageLive(_9); // scope 4 at $DIR/matches_reduce_branches.rs:35:12: 35:13
_9 = _4; // scope 4 at $DIR/matches_reduce_branches.rs:35:12: 35:13
StorageLive(_10); // scope 4 at $DIR/matches_reduce_branches.rs:35:15: 35:16
_10 = _5; // scope 4 at $DIR/matches_reduce_branches.rs:35:15: 35:16
(_0.0: bool) = move _7; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
(_0.1: bool) = move _8; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
(_0.2: bool) = move _9; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
(_0.3: bool) = move _10; // scope 4 at $DIR/matches_reduce_branches.rs:35:5: 35:17
StorageDead(_10); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_9); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_8); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_7); // scope 4 at $DIR/matches_reduce_branches.rs:35:16: 35:17
StorageDead(_5); // scope 3 at $DIR/matches_reduce_branches.rs:36:1: 36:2
StorageDead(_4); // scope 2 at $DIR/matches_reduce_branches.rs:36:1: 36:2
StorageDead(_3); // scope 1 at $DIR/matches_reduce_branches.rs:36:1: 36:2
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:36:1: 36:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:36:2: 36:2
+ StorageDead(_11); // scope 4 at $DIR/matches_reduce_branches.rs:20:9: 20:10
StorageDead(_6); // scope 4 at $DIR/matches_reduce_branches.rs:34:6: 34:7
StorageLive(_7); // scope 4 at $DIR/matches_reduce_branches.rs:36:6: 36:7
_7 = _2; // scope 4 at $DIR/matches_reduce_branches.rs:36:6: 36:7
StorageLive(_8); // scope 4 at $DIR/matches_reduce_branches.rs:36:9: 36:10
_8 = _3; // scope 4 at $DIR/matches_reduce_branches.rs:36:9: 36:10
StorageLive(_9); // scope 4 at $DIR/matches_reduce_branches.rs:36:12: 36:13
_9 = _4; // scope 4 at $DIR/matches_reduce_branches.rs:36:12: 36:13
StorageLive(_10); // scope 4 at $DIR/matches_reduce_branches.rs:36:15: 36:16
_10 = _5; // scope 4 at $DIR/matches_reduce_branches.rs:36:15: 36:16
(_0.0: bool) = move _7; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
(_0.1: bool) = move _8; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
(_0.2: bool) = move _9; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
(_0.3: bool) = move _10; // scope 4 at $DIR/matches_reduce_branches.rs:36:5: 36:17
StorageDead(_10); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_9); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_8); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_7); // scope 4 at $DIR/matches_reduce_branches.rs:36:16: 36:17
StorageDead(_5); // scope 3 at $DIR/matches_reduce_branches.rs:37:1: 37:2
StorageDead(_4); // scope 2 at $DIR/matches_reduce_branches.rs:37:1: 37:2
StorageDead(_3); // scope 1 at $DIR/matches_reduce_branches.rs:37:1: 37:2
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:37:1: 37:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:37:2: 37:2
}
}

47
src/test/mir-opt/matches_reduce_branches.foo.MatchBranchSimplification.32bit.diff
View File

@ -2,47 +2,26 @@
+ // MIR for `foo` after MatchBranchSimplification
fn foo(_1: Option<()>) -> () {
debug bar => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:6:8: 6:11
let mut _0: (); // return place in scope 0 at $DIR/matches_reduce_branches.rs:6:25: 6:25
let mut _2: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
let mut _3: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ let mut _4: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
debug bar => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:7:8: 7:11
let mut _0: (); // return place in scope 0 at $DIR/matches_reduce_branches.rs:7:25: 7:25
let mut _2: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
bb0: {
StorageLive(_2); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
_3 = discriminant(_1); // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
- switchInt(move _3) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ _4 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ _2 = Eq(_4, const 0_isize); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
+ StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ switchInt(move _2) -> [false: bb1, otherwise: bb2]; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
_2 = discriminant(_1); // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
}
bb1: {
- _2 = const false; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- }
-
- bb2: {
- _2 = const true; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- }
-
- bb3: {
- switchInt(move _2) -> [false: bb4, otherwise: bb5]; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
- }
-
- bb4: {
_0 = const (); // scope 0 at $DIR/matches_reduce_branches.rs:9:6: 9:6
- goto -> bb5; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
+ goto -> bb2; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
_0 = const (); // scope 0 at $DIR/matches_reduce_branches.rs:10:6: 10:6
goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
}
- bb5: {
+ bb2: {
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:9:5: 9:6
return; // scope 0 at $DIR/matches_reduce_branches.rs:10:2: 10:2
bb2: {
goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
}
bb3: {
return; // scope 0 at $DIR/matches_reduce_branches.rs:11:2: 11:2
}
}

47
src/test/mir-opt/matches_reduce_branches.foo.MatchBranchSimplification.64bit.diff
View File

@ -2,47 +2,26 @@
+ // MIR for `foo` after MatchBranchSimplification
fn foo(_1: Option<()>) -> () {
debug bar => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:6:8: 6:11
let mut _0: (); // return place in scope 0 at $DIR/matches_reduce_branches.rs:6:25: 6:25
let mut _2: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
let mut _3: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ let mut _4: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
debug bar => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:7:8: 7:11
let mut _0: (); // return place in scope 0 at $DIR/matches_reduce_branches.rs:7:25: 7:25
let mut _2: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
bb0: {
StorageLive(_2); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
_3 = discriminant(_1); // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
- switchInt(move _3) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ _4 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ _2 = Eq(_4, const 0_isize); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
+ StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:7:22: 7:26
+ switchInt(move _2) -> [false: bb1, otherwise: bb2]; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
_2 = discriminant(_1); // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
}
bb1: {
- _2 = const false; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- }
-
- bb2: {
- _2 = const true; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
- }
-
- bb3: {
- switchInt(move _2) -> [false: bb4, otherwise: bb5]; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
- }
-
- bb4: {
_0 = const (); // scope 0 at $DIR/matches_reduce_branches.rs:9:6: 9:6
- goto -> bb5; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
+ goto -> bb2; // scope 0 at $DIR/matches_reduce_branches.rs:7:5: 9:6
_0 = const (); // scope 0 at $DIR/matches_reduce_branches.rs:10:6: 10:6
goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
}
- bb5: {
+ bb2: {
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:9:5: 9:6
return; // scope 0 at $DIR/matches_reduce_branches.rs:10:2: 10:2
bb2: {
goto -> bb3; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
}
bb3: {
return; // scope 0 at $DIR/matches_reduce_branches.rs:11:2: 11:2
}
}

21
src/test/mir-opt/matches_reduce_branches.foo.PreCodegen.before.32bit.mir Normal file
View File

@ -0,0 +1,21 @@
// MIR for `foo` before PreCodegen
fn foo(_1: Option<()>) -> () {
debug bar => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:7:8: 7:11
let mut _0: (); // return place in scope 0 at $DIR/matches_reduce_branches.rs:7:25: 7:25
let mut _2: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
bb0: {
_2 = discriminant(_1); // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
}
bb1: {
_0 = const (); // scope 0 at $DIR/matches_reduce_branches.rs:10:6: 10:6
return; // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
}
bb2: {
return; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
}
}

21
src/test/mir-opt/matches_reduce_branches.foo.PreCodegen.before.64bit.mir Normal file
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@ -0,0 +1,21 @@
// MIR for `foo` before PreCodegen
fn foo(_1: Option<()>) -> () {
debug bar => _1; // in scope 0 at $DIR/matches_reduce_branches.rs:7:8: 7:11
let mut _0: (); // return place in scope 0 at $DIR/matches_reduce_branches.rs:7:25: 7:25
let mut _2: isize; // in scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
bb0: {
_2 = discriminant(_1); // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
switchInt(move _2) -> [0_isize: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:8:22: 8:26
}
bb1: {
_0 = const (); // scope 0 at $DIR/matches_reduce_branches.rs:10:6: 10:6
return; // scope 0 at $DIR/matches_reduce_branches.rs:8:5: 10:6
}
bb2: {
return; // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
}
}

128
src/test/mir-opt/matches_reduce_branches.match_nested_if.MatchBranchSimplification.32bit.diff
View File

@ -2,110 +2,110 @@
+ // MIR for `match_nested_if` after MatchBranchSimplification
fn match_nested_if() -> bool {
let mut _0: bool; // return place in scope 0 at $DIR/matches_reduce_branches.rs:38:25: 38:29
let _1: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:39:9: 39:12
let mut _2: (); // in scope 0 at $DIR/matches_reduce_branches.rs:39:21: 39:23
let mut _3: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
let mut _4: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
let mut _5: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
let mut _6: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:24: 40:28
+ let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
+ let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
let mut _0: bool; // return place in scope 0 at $DIR/matches_reduce_branches.rs:39:25: 39:29
let _1: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:9: 40:12
let mut _2: (); // in scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:23
let mut _3: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
let mut _4: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
let mut _5: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
let mut _6: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:24: 41:28
+ let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
+ let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
+ let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
scope 1 {
debug val => _1; // in scope 1 at $DIR/matches_reduce_branches.rs:39:9: 39:12
debug val => _1; // in scope 1 at $DIR/matches_reduce_branches.rs:40:9: 40:12
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/matches_reduce_branches.rs:39:9: 39:12
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:39:21: 39:23
StorageLive(_3); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
StorageLive(_5); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
StorageLive(_6); // scope 0 at $DIR/matches_reduce_branches.rs:40:24: 40:28
_6 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:24: 40:28
- switchInt(move _6) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
StorageLive(_1); // scope 0 at $DIR/matches_reduce_branches.rs:40:9: 40:12
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:23
StorageLive(_3); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
StorageLive(_5); // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
StorageLive(_6); // scope 0 at $DIR/matches_reduce_branches.rs:41:24: 41:28
_6 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:41:24: 41:28
- switchInt(move _6) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
- }
-
- bb1: {
- _5 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:30: 40:34
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
- _5 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:41:31: 41:35
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
- }
-
- bb2: {
- _5 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:40:42: 40:47
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
- _5 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:41:45: 41:50
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
- }
-
- bb3: {
+ StorageLive(_7); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
+ _7 = move _6; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
+ _5 = Ne(_7, const false); // scope 0 at $DIR/matches_reduce_branches.rs:40:42: 40:47
+ StorageDead(_7); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
StorageDead(_6); // scope 0 at $DIR/matches_reduce_branches.rs:40:47: 40:48
- switchInt(move _5) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ StorageLive(_7); // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
+ _7 = move _6; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
+ _5 = Ne(_7, const false); // scope 0 at $DIR/matches_reduce_branches.rs:41:45: 41:50
+ StorageDead(_7); // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
StorageDead(_6); // scope 0 at $DIR/matches_reduce_branches.rs:41:51: 41:52
- switchInt(move _5) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
- }
-
- bb4: {
- _4 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:50: 40:54
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
- _4 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:41:55: 41:59
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
- }
-
- bb5: {
- _4 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:40:62: 40:67
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
- _4 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:41:69: 41:74
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
- }
-
- bb6: {
+ StorageLive(_8); // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ _8 = move _5; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ _4 = Ne(_8, const false); // scope 0 at $DIR/matches_reduce_branches.rs:40:62: 40:67
+ StorageDead(_8); // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
StorageDead(_5); // scope 0 at $DIR/matches_reduce_branches.rs:40:67: 40:68
- switchInt(move _4) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ StorageLive(_8); // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
+ _8 = move _5; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
+ _4 = Ne(_8, const false); // scope 0 at $DIR/matches_reduce_branches.rs:41:69: 41:74
+ StorageDead(_8); // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
StorageDead(_5); // scope 0 at $DIR/matches_reduce_branches.rs:41:75: 41:76
- switchInt(move _4) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb7: {
- _3 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:70: 40:74
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
- _3 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:42:13: 42:17
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb8: {
- _3 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:40:82: 40:87
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
- _3 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:44:13: 44:18
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb9: {
+ StorageLive(_9); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ _9 = move _4; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ _3 = Ne(_9, const false); // scope 0 at $DIR/matches_reduce_branches.rs:40:82: 40:87
+ StorageDead(_9); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:40:87: 40:88
- switchInt(move _3) -> [false: bb11, otherwise: bb10]; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ StorageLive(_9); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ _9 = move _4; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ _3 = Ne(_9, const false); // scope 0 at $DIR/matches_reduce_branches.rs:44:13: 44:18
+ StorageDead(_9); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:45:9: 45:10
- switchInt(move _3) -> [false: bb11, otherwise: bb10]; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb10: {
+ StorageLive(_10); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ _10 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:40:95: 40:96
- _1 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:92: 40:96
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:39:15: 42:6
+ StorageLive(_10); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ _10 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:48:9: 48:10
- _1 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:47:13: 47:17
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 50:6
- }
-
- bb11: {
- StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:40:95: 40:96
- _1 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:41:14: 41:19
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:39:15: 42:6
- StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:48:9: 48:10
- _1 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:49:14: 49:19
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 50:6
- }
-
- bb12: {
+ _1 = Ne(_10, const false); // scope 0 at $DIR/matches_reduce_branches.rs:41:14: 41:19
+ StorageDead(_10); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:42:6: 42:7
_0 = _1; // scope 1 at $DIR/matches_reduce_branches.rs:43:5: 43:8
StorageDead(_1); // scope 0 at $DIR/matches_reduce_branches.rs:44:1: 44:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:44:2: 44:2
+ _1 = Ne(_10, const false); // scope 0 at $DIR/matches_reduce_branches.rs:49:14: 49:19
+ StorageDead(_10); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:50:6: 50:7
_0 = _1; // scope 1 at $DIR/matches_reduce_branches.rs:51:5: 51:8
StorageDead(_1); // scope 0 at $DIR/matches_reduce_branches.rs:52:1: 52:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:52:2: 52:2
}
}

128
src/test/mir-opt/matches_reduce_branches.match_nested_if.MatchBranchSimplification.64bit.diff
View File

@ -2,110 +2,110 @@
+ // MIR for `match_nested_if` after MatchBranchSimplification
fn match_nested_if() -> bool {
let mut _0: bool; // return place in scope 0 at $DIR/matches_reduce_branches.rs:38:25: 38:29
let _1: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:39:9: 39:12
let mut _2: (); // in scope 0 at $DIR/matches_reduce_branches.rs:39:21: 39:23
let mut _3: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
let mut _4: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
let mut _5: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
let mut _6: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:24: 40:28
+ let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
+ let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
let mut _0: bool; // return place in scope 0 at $DIR/matches_reduce_branches.rs:39:25: 39:29
let _1: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:40:9: 40:12
let mut _2: (); // in scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:23
let mut _3: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
let mut _4: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
let mut _5: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
let mut _6: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:24: 41:28
+ let mut _7: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
+ let mut _8: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
+ let mut _9: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ let mut _10: bool; // in scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
scope 1 {
debug val => _1; // in scope 1 at $DIR/matches_reduce_branches.rs:39:9: 39:12
debug val => _1; // in scope 1 at $DIR/matches_reduce_branches.rs:40:9: 40:12
}
bb0: {
StorageLive(_1); // scope 0 at $DIR/matches_reduce_branches.rs:39:9: 39:12
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:39:21: 39:23
StorageLive(_3); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
StorageLive(_5); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
StorageLive(_6); // scope 0 at $DIR/matches_reduce_branches.rs:40:24: 40:28
_6 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:24: 40:28
- switchInt(move _6) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
StorageLive(_1); // scope 0 at $DIR/matches_reduce_branches.rs:40:9: 40:12
StorageLive(_2); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:23
StorageLive(_3); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageLive(_4); // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
StorageLive(_5); // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
StorageLive(_6); // scope 0 at $DIR/matches_reduce_branches.rs:41:24: 41:28
_6 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:41:24: 41:28
- switchInt(move _6) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
- }
-
- bb1: {
- _5 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:30: 40:34
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
- _5 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:41:31: 41:35
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
- }
-
- bb2: {
- _5 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:40:42: 40:47
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
- _5 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:41:45: 41:50
- goto -> bb3; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
- }
-
- bb3: {
+ StorageLive(_7); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
+ _7 = move _6; // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
+ _5 = Ne(_7, const false); // scope 0 at $DIR/matches_reduce_branches.rs:40:42: 40:47
+ StorageDead(_7); // scope 0 at $DIR/matches_reduce_branches.rs:40:21: 40:48
StorageDead(_6); // scope 0 at $DIR/matches_reduce_branches.rs:40:47: 40:48
- switchInt(move _5) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ StorageLive(_7); // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
+ _7 = move _6; // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
+ _5 = Ne(_7, const false); // scope 0 at $DIR/matches_reduce_branches.rs:41:45: 41:50
+ StorageDead(_7); // scope 0 at $DIR/matches_reduce_branches.rs:41:21: 41:52
StorageDead(_6); // scope 0 at $DIR/matches_reduce_branches.rs:41:51: 41:52
- switchInt(move _5) -> [false: bb5, otherwise: bb4]; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
- }
-
- bb4: {
- _4 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:50: 40:54
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
- _4 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:41:55: 41:59
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
- }
-
- bb5: {
- _4 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:40:62: 40:67
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
- _4 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:41:69: 41:74
- goto -> bb6; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
- }
-
- bb6: {
+ StorageLive(_8); // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ _8 = move _5; // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
+ _4 = Ne(_8, const false); // scope 0 at $DIR/matches_reduce_branches.rs:40:62: 40:67
+ StorageDead(_8); // scope 0 at $DIR/matches_reduce_branches.rs:40:18: 40:68
StorageDead(_5); // scope 0 at $DIR/matches_reduce_branches.rs:40:67: 40:68
- switchInt(move _4) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ StorageLive(_8); // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
+ _8 = move _5; // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
+ _4 = Ne(_8, const false); // scope 0 at $DIR/matches_reduce_branches.rs:41:69: 41:74
+ StorageDead(_8); // scope 0 at $DIR/matches_reduce_branches.rs:41:18: 41:76
StorageDead(_5); // scope 0 at $DIR/matches_reduce_branches.rs:41:75: 41:76
- switchInt(move _4) -> [false: bb8, otherwise: bb7]; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb7: {
- _3 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:70: 40:74
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
- _3 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:42:13: 42:17
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb8: {
- _3 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:40:82: 40:87
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
- _3 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:44:13: 44:18
- goto -> bb9; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb9: {
+ StorageLive(_9); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ _9 = move _4; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ _3 = Ne(_9, const false); // scope 0 at $DIR/matches_reduce_branches.rs:40:82: 40:87
+ StorageDead(_9); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:40:87: 40:88
- switchInt(move _3) -> [false: bb11, otherwise: bb10]; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ StorageLive(_9); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ _9 = move _4; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ _3 = Ne(_9, const false); // scope 0 at $DIR/matches_reduce_branches.rs:44:13: 44:18
+ StorageDead(_9); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageDead(_4); // scope 0 at $DIR/matches_reduce_branches.rs:45:9: 45:10
- switchInt(move _3) -> [false: bb11, otherwise: bb10]; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
- }
-
- bb10: {
+ StorageLive(_10); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
+ _10 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:40:95: 40:96
- _1 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:40:92: 40:96
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:39:15: 42:6
+ StorageLive(_10); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
+ _10 = move _3; // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:48:9: 48:10
- _1 = const true; // scope 0 at $DIR/matches_reduce_branches.rs:47:13: 47:17
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 50:6
- }
-
- bb11: {
- StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:40:95: 40:96
- _1 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:41:14: 41:19
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:39:15: 42:6
- StorageDead(_3); // scope 0 at $DIR/matches_reduce_branches.rs:48:9: 48:10
- _1 = const false; // scope 0 at $DIR/matches_reduce_branches.rs:49:14: 49:19
- goto -> bb12; // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 50:6
- }
-
- bb12: {
+ _1 = Ne(_10, const false); // scope 0 at $DIR/matches_reduce_branches.rs:41:14: 41:19
+ StorageDead(_10); // scope 0 at $DIR/matches_reduce_branches.rs:40:15: 40:88
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:42:6: 42:7
_0 = _1; // scope 1 at $DIR/matches_reduce_branches.rs:43:5: 43:8
StorageDead(_1); // scope 0 at $DIR/matches_reduce_branches.rs:44:1: 44:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:44:2: 44:2
+ _1 = Ne(_10, const false); // scope 0 at $DIR/matches_reduce_branches.rs:49:14: 49:19
+ StorageDead(_10); // scope 0 at $DIR/matches_reduce_branches.rs:41:15: 45:10
StorageDead(_2); // scope 0 at $DIR/matches_reduce_branches.rs:50:6: 50:7
_0 = _1; // scope 1 at $DIR/matches_reduce_branches.rs:51:5: 51:8
StorageDead(_1); // scope 0 at $DIR/matches_reduce_branches.rs:52:1: 52:2
return; // scope 0 at $DIR/matches_reduce_branches.rs:52:2: 52:2
}
}

20
src/test/mir-opt/matches_reduce_branches.rs
View File

@ -1,11 +1,12 @@
// EMIT_MIR_FOR_EACH_BIT_WIDTH
// EMIT_MIR matches_reduce_branches.foo.MatchBranchSimplification.diff
// EMIT_MIR matches_reduce_branches.foo.PreCodegen.before.mir
// EMIT_MIR matches_reduce_branches.bar.MatchBranchSimplification.diff
// EMIT_MIR matches_reduce_branches.match_nested_if.MatchBranchSimplification.diff
fn foo(bar: Option<()>) {
if matches!(bar, None) {
()
()
}
}
@ -37,15 +38,22 @@ fn bar(i: i32) -> (bool, bool, bool, bool) {
fn match_nested_if() -> bool {
let val = match () {
() if if if if true {true} else {false} {true} else {false} {true} else {false} => true,
() if if if if true { true } else { false } { true } else { false } {
true
} else {
false
} =>
{
true
}
_ => false,
};
val
}
fn main() {
let _ = foo(None);
let _ = foo(Some(()));
let _ = bar(0);
let _ = match_nested_if();
let _ = foo(None);
let _ = foo(Some(()));
let _ = bar(0);
let _ = match_nested_if();
}

48
src/test/mir-opt/not_equal_false.opt.InstCombine.diff
View File

@ -1,50 +1,34 @@
- // MIR for `opt` before InstCombine
+ // MIR for `opt` after InstCombine
fn opt(_1: Option<()>) -> bool {
fn opt(_1: bool) -> u32 {
debug x => _1; // in scope 0 at $DIR/not_equal_false.rs:3:8: 3:9
let mut _0: bool; // return place in scope 0 at $DIR/not_equal_false.rs:3:26: 3:30
let mut _2: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
let mut _3: isize; // in scope 0 at $DIR/not_equal_false.rs:4:17: 4:21
let mut _4: bool; // in scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
let mut _5: isize; // in scope 0 at $DIR/not_equal_false.rs:4:38: 4:45
let mut _6: isize; // in scope 0 at $DIR/not_equal_false.rs:4:17: 4:21
let mut _7: isize; // in scope 0 at $DIR/not_equal_false.rs:4:38: 4:45
let mut _8: bool; // in scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
let mut _0: u32; // return place in scope 0 at $DIR/not_equal_false.rs:3:20: 3:23
let mut _2: bool; // in scope 0 at $DIR/not_equal_false.rs:4:8: 4:18
let mut _3: bool; // in scope 0 at $DIR/not_equal_false.rs:4:8: 4:9
bb0: {
StorageLive(_2); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
_3 = discriminant(_1); // scope 0 at $DIR/not_equal_false.rs:4:17: 4:21
StorageLive(_6); // scope 0 at $DIR/not_equal_false.rs:4:17: 4:21
_6 = move _3; // scope 0 at $DIR/not_equal_false.rs:4:17: 4:21
_2 = Eq(_6, const 0_isize); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
StorageDead(_6); // scope 0 at $DIR/not_equal_false.rs:4:17: 4:21
switchInt(move _2) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
StorageLive(_2); // scope 0 at $DIR/not_equal_false.rs:4:8: 4:18
StorageLive(_3); // scope 0 at $DIR/not_equal_false.rs:4:8: 4:9
_3 = _1; // scope 0 at $DIR/not_equal_false.rs:4:8: 4:9
- _2 = Ne(move _3, const false); // scope 0 at $DIR/not_equal_false.rs:4:8: 4:18
+ _2 = move _3; // scope 0 at $DIR/not_equal_false.rs:4:8: 4:18
StorageDead(_3); // scope 0 at $DIR/not_equal_false.rs:4:17: 4:18
switchInt(move _2) -> [false: bb2, otherwise: bb1]; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:35
}
bb1: {
_0 = const true; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
goto -> bb3; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
_0 = const 0_u32; // scope 0 at $DIR/not_equal_false.rs:4:21: 4:22
goto -> bb3; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:35
}
bb2: {
StorageLive(_4); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
_5 = discriminant(_1); // scope 0 at $DIR/not_equal_false.rs:4:38: 4:45
StorageLive(_7); // scope 0 at $DIR/not_equal_false.rs:4:38: 4:45
_7 = move _5; // scope 0 at $DIR/not_equal_false.rs:4:38: 4:45
_4 = Eq(_7, const 1_isize); // scope 0 at $SRC_DIR/core/src/macros/mod.rs:LL:COL
StorageDead(_7); // scope 0 at $DIR/not_equal_false.rs:4:38: 4:45
StorageLive(_8); // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
_8 = move _4; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
- _0 = Ne(_8, const false); // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
+ _0 = _8; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
StorageDead(_8); // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
goto -> bb3; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:46
_0 = const 1_u32; // scope 0 at $DIR/not_equal_false.rs:4:32: 4:33
goto -> bb3; // scope 0 at $DIR/not_equal_false.rs:4:5: 4:35
}
bb3: {
StorageDead(_4); // scope 0 at $DIR/not_equal_false.rs:4:45: 4:46
StorageDead(_2); // scope 0 at $DIR/not_equal_false.rs:4:45: 4:46
StorageDead(_2); // scope 0 at $DIR/not_equal_false.rs:4:34: 4:35
return; // scope 0 at $DIR/not_equal_false.rs:5:2: 5:2
}
}

6
src/test/mir-opt/not_equal_false.rs
View File

@ -1,9 +1,9 @@
// EMIT_MIR not_equal_false.opt.InstCombine.diff
fn opt(x: Option<()>) -> bool {
matches!(x, None) || matches!(x, Some(_))
fn opt(x: bool) -> u32 {
if x != false { 0 } else { 1 }
}
fn main() {
opt(None);
opt(false);
}