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[GVN] Add support for unary FNeg to GVN pass 

Differential Revision: https://reviews.llvm.org/D63896

llvm-svn: 364592
This commit is contained in:
Cameron McInally 2019-06-27 21:05:02 +00:00
parent 8007ff1ab1
commit 6e62a796d5
2 changed files with 3 additions and 3 deletions
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1
llvm/lib/Transforms/Scalar/GVN.cpp
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@ -492,6 +492,7 @@ uint32_t GVN::ValueTable::lookupOrAdd(Value *V) {
switch (I->getOpcode()) {
case Instruction::Call:
return lookupOrAddCall(cast<CallInst>(I));
case Instruction::FNeg:
case Instruction::Add:
case Instruction::FAdd:
case Instruction::Sub:

5
llvm/test/Transforms/GVN/fpmath.ll
View File

@ -43,9 +43,8 @@ define double @test4(double %x, double %y) {
define double @test5(double %x, double %y) {
; CHECK: @test5(double %x, double %y)
; CHECK: %neg1 = fneg double %x, !fpmath !0
; CHECK: %neg2 = fneg double %x, !fpmath !1
; CHECK: %foo = fadd double %neg1, %neg2
; CHECK: %neg1 = fneg double %x, !fpmath !1
; CHECK: %foo = fadd double %neg1, %neg1
%neg1 = fneg double %x, !fpmath !0
%neg2 = fneg double %x, !fpmath !1
%foo = fadd double %neg1, %neg2