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| author | elhewaty <mohamedatef1698@gmail.com> | 2024-03-29 08:08:49 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-03-29 14:08:49 +0800 |
| commit | 7d3924cee30a87a51f9dc04ec843ae6bc3d1c90e (patch) | |
| tree | 7e23e8a759adcd9911b77834c6a79f350685cb4d /llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | |
| parent | ba6b2d22af177a72b132cdb8e9350a708f282d2c (diff) | |
| download | llvm-7d3924cee30a87a51f9dc04ec843ae6bc3d1c90e.zip llvm-7d3924cee30a87a51f9dc04ec843ae6bc3d1c90e.tar.gz llvm-7d3924cee30a87a51f9dc04ec843ae6bc3d1c90e.tar.bz2 | |
[IR] Add nowrap flags for trunc instruction (#85592)
This patch adds the nuw (no unsigned wrap) and nsw (no signed wrap)
poison-generating flags to the trunc instruction.
Discourse thread:
https://discourse.llvm.org/t/rfc-add-nowrap-flags-to-trunc/77453
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
| -rw-r--r-- | llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp index a8b69f8..221eeaa 100644 --- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -1640,6 +1640,11 @@ static uint64_t getOptimizationFlags(const Value *V) { } else if (const auto *NNI = dyn_cast<PossiblyNonNegInst>(V)) { if (NNI->hasNonNeg()) Flags |= 1 << bitc::PNNI_NON_NEG; + } else if (const auto *TI = dyn_cast<TruncInst>(V)) { + if (TI->hasNoSignedWrap()) + Flags |= 1 << bitc::TIO_NO_SIGNED_WRAP; + if (TI->hasNoUnsignedWrap()) + Flags |= 1 << bitc::TIO_NO_UNSIGNED_WRAP; } return Flags; |