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[LLVM] Add the support for fmax and fmin in atomicrmw instruction

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This patch adds the support for `fmax` and `fmin` operations in `atomicrmw`
instruction. For now (at least in this patch), the instruction will be expanded
to CAS loop. There are already a couple of targets supporting the feature. I'll
create another patch(es) to enable them accordingly.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D127041
This commit is contained in:
Shilei Tian
2022-07-06 10:57:24 -04:00
parent f8e026457e
commit 1023ddaf77
36 changed files with 230 additions and 9 deletions
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2
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -577,6 +577,8 @@ static unsigned getEncodedRMWOperation(AtomicRMWInst::BinOp Op) {
case AtomicRMWInst::UMin: return bitc::RMW_UMIN;
case AtomicRMWInst::FAdd: return bitc::RMW_FADD;
case AtomicRMWInst::FSub: return bitc::RMW_FSUB;
case AtomicRMWInst::FMax: return bitc::RMW_FMAX;
case AtomicRMWInst::FMin: return bitc::RMW_FMIN;
}
}