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| author | Dimitry Andric <dim@FreeBSD.org> | 2021-12-25 22:36:56 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2022-05-14 11:44:01 +0000 |
| commit | 0eae32dcef82f6f06de6419a0d623d7def0cc8f6 (patch) | |
| tree | 55b7e05be47b835fd137915bee1e64026c35e71c /contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp | |
| parent | 4824e7fd18a1223177218d4aec1b3c6c5c4a444e (diff) | |
| parent | 77fc4c146f0870ffb09c1afb823ccbe742c5e6ff (diff) | |
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp b/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp index ec926b1f5a94..ecad79b68185 100644 --- a/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp +++ b/contrib/llvm-project/llvm/lib/Transforms/Utils/Local.cpp @@ -402,6 +402,18 @@ bool llvm::isInstructionTriviallyDead(Instruction *I, return wouldInstructionBeTriviallyDead(I, TLI); } +bool llvm::wouldInstructionBeTriviallyDeadOnUnusedPaths( + Instruction *I, const TargetLibraryInfo *TLI) { + // Instructions that are "markers" and have implied meaning on code around + // them (without explicit uses), are not dead on unused paths. + if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(I)) + if (II->getIntrinsicID() == Intrinsic::stacksave || + II->getIntrinsicID() == Intrinsic::launder_invariant_group || + II->isLifetimeStartOrEnd()) + return false; + return wouldInstructionBeTriviallyDead(I, TLI); +} + bool llvm::wouldInstructionBeTriviallyDead(Instruction *I, const TargetLibraryInfo *TLI) { if (I->isTerminator()) |