From 7d3924cee30a87a51f9dc04ec843ae6bc3d1c90e Mon Sep 17 00:00:00 2001 From: elhewaty Date: Fri, 29 Mar 2024 08:08:49 +0200 Subject: [IR] Add nowrap flags for trunc instruction (#85592) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp') 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(V)) { if (NNI->hasNonNeg()) Flags |= 1 << bitc::PNNI_NON_NEG; + } else if (const auto *TI = dyn_cast(V)) { + if (TI->hasNoSignedWrap()) + Flags |= 1 << bitc::TIO_NO_SIGNED_WRAP; + if (TI->hasNoUnsignedWrap()) + Flags |= 1 << bitc::TIO_NO_UNSIGNED_WRAP; } return Flags; -- cgit v1.1