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Perform instsimplify before inline to eliminate some trivial calls

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DianQK 2024-07-27 14:36:17 +08:00
parent 80d8270d84
commit ae681c940d
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83 changed files with 226 additions and 182 deletions
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5
compiler/rustc_mir_transform/src/lib.rs
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@ -571,6 +571,8 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
// Has to be done before inlining, otherwise actual call will be almost always inlined.
// Also simple, so can just do first
&lower_slice_len::LowerSliceLenCalls,
// Perform instsimplify before inline to eliminate some trivial calls (like clone shims).
&instsimplify::InstSimplify::BeforeInline,
// Perform inlining, which may add a lot of code.
&inline::Inline,
// Code from other crates may have storage markers, so this needs to happen after inlining.
@ -590,7 +592,8 @@ fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'tcx>) {
&match_branches::MatchBranchSimplification,
// inst combine is after MatchBranchSimplification to clean up Ne(_1, false)
&multiple_return_terminators::MultipleReturnTerminators,
&instsimplify::InstSimplify,
// After simplifycfg, it allows us to discover new opportunities for peephole optimizations.
&instsimplify::InstSimplify::AfterSimplifyCfg,
&simplify::SimplifyLocals::BeforeConstProp,
&dead_store_elimination::DeadStoreElimination::Initial,
&gvn::GVN,