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| author | Matt Arsenault <Matthew.Arsenault@amd.com> | 2018-08-28 18:10:02 +0000 |
|---|---|---|
| committer | Matt Arsenault <Matthew.Arsenault@amd.com> | 2018-08-28 18:10:02 +0000 |
| commit | 10de2775bd31d332f2f1a2a62634eff78cf9d31f (patch) | |
| tree | 14b1231726be580647495766b650afc01347ee91 /llvm/lib/Transforms | |
| parent | 9873909b428497dfb5633579c63e97bac7e0a3f7 (diff) | |
| download | bcm5719-llvm-10de2775bd31d332f2f1a2a62634eff78cf9d31f.tar.gz bcm5719-llvm-10de2775bd31d332f2f1a2a62634eff78cf9d31f.zip | |
AMDGPU: Remove nan tests in class if src is nnan
llvm-svn: 340850
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp index 1d0cd11f941..2993f0095a6 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp @@ -3282,6 +3282,13 @@ Instruction *InstCombiner::visitCallInst(CallInst &CI) { return replaceInstUsesWith(*II, FCmp); } + // fp_class (nnan x), qnan|snan|other -> fp_class (nnan x), other + if (((Mask & S_NAN) || (Mask & Q_NAN)) && isKnownNeverNaN(Src0, &TLI)) { + II->setArgOperand(1, ConstantInt::get(Src1->getType(), + Mask & ~(S_NAN | Q_NAN))); + return II; + } + const ConstantFP *CVal = dyn_cast<ConstantFP>(Src0); if (!CVal) { if (isa<UndefValue>(Src0)) |
