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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/Reader/BitcodeReader.cpp
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@@ -1243,6 +1243,8 @@ static AtomicRMWInst::BinOp getDecodedRMWOperation(unsigned Val) {
case bitc::RMW_UMIN: return AtomicRMWInst::UMin;
case bitc::RMW_FADD: return AtomicRMWInst::FAdd;
case bitc::RMW_FSUB: return AtomicRMWInst::FSub;
case bitc::RMW_FMAX: return AtomicRMWInst::FMax;
case bitc::RMW_FMIN: return AtomicRMWInst::FMin;
}
}