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Remove support for adding statement to all successors

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This feature of MIR patch system is no longer used.
This commit is contained in:
Tomasz Miąsko 2022-07-30 00:00:00 +00:00
parent 625af2cc75
commit c2b74f9cc7
1 changed files with 0 additions and 17 deletions
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17
compiler/rustc_middle/src/mir/patch.rs
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@ -150,7 +150,6 @@ impl<'tcx> MirPatch<'tcx> {
let mut delta = 0;
let mut last_bb = START_BLOCK;
let mut stmts_and_targets: Vec<(Statement<'_>, BasicBlock)> = Vec::new();
for (mut loc, stmt) in new_statements {
if loc.block != last_bb {
delta = 0;
@ -159,27 +158,11 @@ impl<'tcx> MirPatch<'tcx> {
debug!("MirPatch: adding statement {:?} at loc {:?}+{}", stmt, loc, delta);
loc.statement_index += delta;
let source_info = Self::source_info_for_index(&body[loc.block], loc);
// For mir-opt `Derefer` to work in all cases we need to
// get terminator's targets and apply the statement to all of them.
if loc.statement_index > body[loc.block].statements.len() {
let term = body[loc.block].terminator();
for i in term.successors() {
stmts_and_targets.push((Statement { source_info, kind: stmt.clone() }, i));
}
delta += 1;
continue;
}
body[loc.block]
.statements
.insert(loc.statement_index, Statement { source_info, kind: stmt });
delta += 1;
}
for (stmt, target) in stmts_and_targets.into_iter().rev() {
body[target].statements.insert(0, stmt);
}
}
pub fn source_info_for_index(data: &BasicBlockData<'_>, loc: Location) -> SourceInfo {