diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/Local.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/Local.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp index 3d3b97e..380bac9 100644 --- a/llvm/lib/Transforms/Utils/Local.cpp +++ b/llvm/lib/Transforms/Utils/Local.cpp @@ -475,6 +475,12 @@ bool llvm::wouldInstructionBeTriviallyDead(const Instruction *I, II->getIntrinsicID() == Intrinsic::launder_invariant_group) return true; + // Intrinsics declare sideeffects to prevent them from moving, but they are + // nops without users. + if (II->getIntrinsicID() == Intrinsic::allow_runtime_check || + II->getIntrinsicID() == Intrinsic::allow_ubsan_check) + return true; + if (II->isLifetimeStartOrEnd()) { auto *Arg = II->getArgOperand(1); // Lifetime intrinsics are dead when their right-hand is undef. |