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auto merge of #5593 : luqmana/rust/inline-asm, r=catamorphism

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Clean things up a bit. Also, allow selecting intel syntax in addition to the default AT&T dialect.
This commit is contained in:
bors 2013-03-28 18:18:46 -07:00
commit f81459211d
11 changed files with 226 additions and 138 deletions
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19
src/librustc/middle/liveness.rs
View File

@ -1306,11 +1306,11 @@ pub impl Liveness {
self.propagate_through_expr(e, succ)
}
expr_inline_asm(_, ref ins, ref outs, _, _, _) =>{
let succ = do ins.foldr(succ) |&(_, expr), succ| {
expr_inline_asm(ref ia) =>{
let succ = do ia.inputs.foldr(succ) |&(_, expr), succ| {
self.propagate_through_expr(expr, succ)
};
do outs.foldr(succ) |&(_, expr), succ| {
do ia.outputs.foldr(succ) |&(_, expr), succ| {
self.propagate_through_expr(expr, succ)
}
}
@ -1580,14 +1580,19 @@ fn check_expr(expr: @expr, &&self: @Liveness, vt: vt<@Liveness>) {
visit::visit_expr(expr, self, vt);
}
expr_inline_asm(_, ref ins, ref outs, _, _, _) => {
for ins.each |&(_, in)| {
expr_inline_asm(ref ia) => {
for ia.inputs.each |&(_, in)| {
(vt.visit_expr)(in, self, vt);
}
// Output operands must be lvalues
for outs.each |&(_, out)| {
self.check_lvalue(out, vt);
for ia.outputs.each |&(_, out)| {
match out.node {
expr_addr_of(_, inner) => {
self.check_lvalue(inner, vt);
}
_ => {}
}
(vt.visit_expr)(out, self, vt);
}

154
src/librustc/middle/trans/asm.rs Normal file
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@ -0,0 +1,154 @@
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*!
# Translation of inline assembly.
*/
use core::prelude::*;
use lib;
use middle::trans::build::*;
use middle::trans::callee;
use middle::trans::common::*;
use middle::ty;
use syntax::ast;
// Take an inline assembly expression and splat it out via LLVM
pub fn trans_inline_asm(bcx: block, ia: &ast::inline_asm) -> block {
let mut bcx = bcx;
let mut constraints = ~[];
let mut cleanups = ~[];
let mut aoutputs = ~[];
// Prepare the output operands
let outputs = do ia.outputs.map |&(c, out)| {
constraints.push(copy *c);
let aoutty = ty::arg {
mode: ast::expl(ast::by_copy),
ty: expr_ty(bcx, out)
};
aoutputs.push(unpack_result!(bcx, {
callee::trans_arg_expr(bcx, aoutty, out, &mut cleanups, None, callee::DontAutorefArg)
}));
let e = match out.node {
ast::expr_addr_of(_, e) => e,
_ => fail!(~"Expression must be addr of")
};
let outty = ty::arg {
mode: ast::expl(ast::by_copy),
ty: expr_ty(bcx, e)
};
unpack_result!(bcx, {
callee::trans_arg_expr(bcx, outty, e, &mut cleanups, None, callee::DontAutorefArg)
})
};
for cleanups.each |c| {
revoke_clean(bcx, *c);
}
cleanups.clear();
// Now the input operands
let inputs = do ia.inputs.map |&(c, in)| {
constraints.push(copy *c);
let inty = ty::arg {
mode: ast::expl(ast::by_copy),
ty: expr_ty(bcx, in)
};
unpack_result!(bcx, {
callee::trans_arg_expr(bcx, inty, in, &mut cleanups, None, callee::DontAutorefArg)
})
};
for cleanups.each |c| {
revoke_clean(bcx, *c);
}
let mut constraints = str::connect(constraints, ",");
let mut clobbers = getClobbers();
if *ia.clobbers != ~"" && clobbers != ~"" {
clobbers = *ia.clobbers + ~"," + clobbers;
} else {
clobbers += *ia.clobbers;
};
// Add the clobbers to our constraints list
if clobbers != ~"" && constraints != ~"" {
constraints += ~"," + clobbers;
} else {
constraints += clobbers;
}
debug!("Asm Constraints: %?", constraints);
let numOutputs = outputs.len();
// Depending on how many outputs we have, the return type is different
let output = if numOutputs == 0 {
T_void()
} else if numOutputs == 1 {
val_ty(outputs[0])
} else {
T_struct(outputs.map(|o| val_ty(*o)))
};
let dialect = match ia.dialect {
ast::asm_att => lib::llvm::AD_ATT,
ast::asm_intel => lib::llvm::AD_Intel
};
let r = do str::as_c_str(*ia.asm) |a| {
do str::as_c_str(constraints) |c| {
InlineAsmCall(bcx, a, c, inputs, output, ia.volatile, ia.alignstack, dialect)
}
};
// Again, based on how many outputs we have
if numOutputs == 1 {
let op = PointerCast(bcx, aoutputs[0], T_ptr(val_ty(outputs[0])));
Store(bcx, r, op);
} else {
for aoutputs.eachi |i, o| {
let v = ExtractValue(bcx, r, i);
let op = PointerCast(bcx, *o, T_ptr(val_ty(outputs[i])));
Store(bcx, v, op);
}
}
return bcx;
}
// Default per-arch clobbers
// Basically what clang does
#[cfg(target_arch = "arm")]
#[cfg(target_arch = "mips")]
fn getClobbers() -> ~str {
~""
}
#[cfg(target_arch = "x86")]
#[cfg(target_arch = "x86_64")]
fn getClobbers() -> ~str {
~"~{dirflag},~{fpsr},~{flags}"
}

105
src/librustc/middle/trans/expr.rs
View File

@ -128,6 +128,7 @@ use metadata::csearch;
use middle::borrowck::root_map_key;
use middle::trans::_match;
use middle::trans::adt;
use middle::trans::asm;
use middle::trans::base;
use middle::trans::base::*;
use middle::trans::build::*;
@ -548,108 +549,8 @@ fn trans_rvalue_stmt_unadjusted(bcx: block, expr: @ast::expr) -> block {
ast::expr_paren(a) => {
return trans_rvalue_stmt_unadjusted(bcx, a);
}
ast::expr_inline_asm(asm, ref ins, ref outs,
clobs, volatile, alignstack) => {
let mut constraints = ~[];
let mut cleanups = ~[];
let mut aoutputs = ~[];
let outputs = do outs.map |&(c, out)| {
constraints.push(copy *c);
let aoutty = ty::arg {
mode: ast::expl(ast::by_copy),
ty: expr_ty(bcx, out)
};
aoutputs.push(unpack_result!(bcx, {
callee::trans_arg_expr(bcx, aoutty, out, &mut cleanups,
None, callee::DontAutorefArg)
}));
let e = match out.node {
ast::expr_addr_of(_, e) => e,
_ => fail!(~"Expression must be addr of")
};
let outty = ty::arg {
mode: ast::expl(ast::by_copy),
ty: expr_ty(bcx, e)
};
unpack_result!(bcx, {
callee::trans_arg_expr(bcx, outty, e, &mut cleanups,
None, callee::DontAutorefArg)
})
};
for cleanups.each |c| {
revoke_clean(bcx, *c);
}
cleanups = ~[];
let inputs = do ins.map |&(c, in)| {
constraints.push(copy *c);
let inty = ty::arg {
mode: ast::expl(ast::by_copy),
ty: expr_ty(bcx, in)
};
unpack_result!(bcx, {
callee::trans_arg_expr(bcx, inty, in, &mut cleanups,
None, callee::DontAutorefArg)
})
};
for cleanups.each |c| {
revoke_clean(bcx, *c);
}
let mut constraints = str::connect(constraints, ",");
// Add the clobbers
if *clobs != ~"" {
if constraints == ~"" {
constraints += *clobs;
} else {
constraints += ~"," + *clobs;
}
} else {
constraints += *clobs;
}
debug!("Asm Constraints: %?", constraints);
let output = if outputs.len() == 0 {
T_void()
} else if outputs.len() == 1 {
val_ty(outputs[0])
} else {
T_struct(outputs.map(|o| val_ty(*o)))
};
let r = do str::as_c_str(*asm) |a| {
do str::as_c_str(constraints) |c| {
InlineAsmCall(bcx, a, c, inputs, output, volatile,
alignstack, lib::llvm::AD_ATT)
}
};
if outputs.len() == 1 {
let op = PointerCast(bcx, aoutputs[0],
T_ptr(val_ty(outputs[0])));
Store(bcx, r, op);
} else {
for aoutputs.eachi |i, o| {
let v = ExtractValue(bcx, r, i);
let op = PointerCast(bcx, *o, T_ptr(val_ty(outputs[i])));
Store(bcx, v, op);
}
}
return bcx;
ast::expr_inline_asm(ref a) => {
return asm::trans_inline_asm(bcx, a);
}
_ => {
bcx.tcx().sess.span_bug(

6
src/librustc/middle/trans/type_use.rs
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@ -360,11 +360,11 @@ pub fn mark_for_expr(cx: Context, e: @expr) {
mark_for_method_call(cx, e.id, e.callee_id);
}
expr_inline_asm(_, ref ins, ref outs, _, _, _) => {
for ins.each |&(_, in)| {
expr_inline_asm(ref ia) => {
for ia.inputs.each |&(_, in)| {
node_type_needs(cx, use_repr, in.id);
}
for outs.each |&(_, out)| {
for ia.outputs.each |&(_, out)| {
node_type_needs(cx, use_repr, out.id);
}
}

6
src/librustc/middle/typeck/check/mod.rs
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@ -2336,13 +2336,13 @@ pub fn check_expr_with_unifier(fcx: @mut FnCtxt,
let region_lb = ty::re_scope(expr.id);
instantiate_path(fcx, pth, tpt, expr.span, expr.id, region_lb);
}
ast::expr_inline_asm(_, ref ins, ref outs, _, _, _) => {
ast::expr_inline_asm(ref ia) => {
fcx.require_unsafe(expr.span, ~"use of inline assembly");
for ins.each |&(_, in)| {
for ia.inputs.each |&(_, in)| {
check_expr(fcx, in);
}
for outs.each |&(_, out)| {
for ia.outputs.each |&(_, out)| {
check_expr(fcx, out);
}
fcx.write_nil(id);

1
src/librustc/rustc.rc
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@ -80,6 +80,7 @@ pub mod middle {
pub mod reachable;
pub mod machine;
pub mod adt;
pub mod asm;
}
pub mod ty;
pub mod resolve;

26
src/libsyntax/ast.rs
View File

@ -593,10 +593,7 @@ pub enum expr_ {
expr_ret(Option<@expr>),
expr_log(@expr, @expr),
expr_inline_asm(@~str, // asm
~[(@~str, @expr)], // inputs
~[(@~str, @expr)], // outputs
@~str, bool, bool), // clobbers, volatile, align stack
expr_inline_asm(inline_asm),
expr_mac(mac),
@ -930,6 +927,27 @@ impl to_bytes::IterBytes for Ty {
}
}
#[auto_encode]
#[auto_decode]
#[deriving(Eq)]
pub enum asm_dialect {
asm_att,
asm_intel
}
#[auto_encode]
#[auto_decode]
#[deriving(Eq)]
pub struct inline_asm {
asm: @~str,
clobbers: @~str,
inputs: ~[(@~str, @expr)],
outputs: ~[(@~str, @expr)],
volatile: bool,
alignstack: bool,
dialect: asm_dialect
}
#[auto_encode]
#[auto_decode]
#[deriving(Eq)]

14
src/libsyntax/ext/asm.rs
View File

@ -53,6 +53,7 @@ pub fn expand_asm(cx: @ext_ctxt, sp: span, tts: &[ast::token_tree])
let mut cons = ~"";
let mut volatile = false;
let mut alignstack = false;
let mut dialect = ast::asm_att;
let mut state = Asm;
loop outer: {
@ -125,6 +126,8 @@ pub fn expand_asm(cx: @ext_ctxt, sp: span, tts: &[ast::token_tree])
volatile = true;
} else if option == ~"alignstack" {
alignstack = true;
} else if option == ~"intel" {
dialect = ast::asm_intel;
}
if *p.token == token::COMMA {
@ -163,8 +166,15 @@ pub fn expand_asm(cx: @ext_ctxt, sp: span, tts: &[ast::token_tree])
MRExpr(@ast::expr {
id: cx.next_id(),
callee_id: cx.next_id(),
node: ast::expr_inline_asm(@asm, inputs, outputs,
@cons, volatile, alignstack),
node: ast::expr_inline_asm(ast::inline_asm {
asm: @asm,
clobbers: @cons,
inputs: inputs,
outputs: outputs,
volatile: volatile,
alignstack: alignstack,
dialect: dialect
}),
span: sp
})
}

13
src/libsyntax/fold.rs
View File

@ -555,13 +555,12 @@ pub fn noop_fold_expr(e: &expr_, fld: @ast_fold) -> expr_ {
fld.fold_expr(e)
)
}
expr_inline_asm(asm, ins, outs, c, v, a) => {
expr_inline_asm(
asm,
ins.map(|&(c, in)| (c, fld.fold_expr(in))),
outs.map(|&(c, out)| (c, fld.fold_expr(out))),
c, v, a
)
expr_inline_asm(a) => {
expr_inline_asm(inline_asm {
inputs: a.inputs.map(|&(c, in)| (c, fld.fold_expr(in))),
outputs: a.outputs.map(|&(c, out)| (c, fld.fold_expr(out))),
.. a
})
}
expr_mac(ref mac) => expr_mac(fold_mac((*mac))),
expr_struct(path, ref fields, maybe_expr) => {

12
src/libsyntax/print/pprust.rs
View File

@ -1388,16 +1388,16 @@ pub fn print_expr(s: @ps, &&expr: @ast::expr) {
print_expr(s, expr);
pclose(s);
}
ast::expr_inline_asm(a, in, out, c, v, _) => {
if v {
ast::expr_inline_asm(a) => {
if a.volatile {
word(s.s, ~"__volatile__ asm!");
} else {
word(s.s, ~"asm!");
}
popen(s);
print_string(s, *a);
print_string(s, *a.asm);
word_space(s, ~":");
for out.each |&(co, o)| {
for a.outputs.each |&(co, o)| {
print_string(s, *co);
popen(s);
print_expr(s, o);
@ -1405,7 +1405,7 @@ pub fn print_expr(s: @ps, &&expr: @ast::expr) {
word_space(s, ~",");
}
word_space(s, ~":");
for in.each |&(co, o)| {
for a.inputs.each |&(co, o)| {
print_string(s, *co);
popen(s);
print_expr(s, o);
@ -1413,7 +1413,7 @@ pub fn print_expr(s: @ps, &&expr: @ast::expr) {
word_space(s, ~",");
}
word_space(s, ~":");
print_string(s, *c);
print_string(s, *a.clobbers);
pclose(s);
}
ast::expr_mac(ref m) => print_mac(s, (*m)),

6
src/libsyntax/visit.rs
View File

@ -562,11 +562,11 @@ pub fn visit_expr<E>(ex: @expr, e: E, v: vt<E>) {
}
expr_mac(ref mac) => visit_mac((*mac), e, v),
expr_paren(x) => (v.visit_expr)(x, e, v),
expr_inline_asm(_, ins, outs, _, _, _) => {
for ins.each |&(_, in)| {
expr_inline_asm(ref a) => {
for a.inputs.each |&(_, in)| {
(v.visit_expr)(in, e, v);
}
for outs.each |&(_, out)| {
for a.outputs.each |&(_, out)| {
(v.visit_expr)(out, e, v);
}
}