[PATCH] D63896: [GVN] Add support for unary FNeg to GVN pass
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Thu Jun 27 14:05:22 PDT 2019
This revision was automatically updated to reflect the committed changes.
Closed by commit rL364592: [GVN] Add support for unary FNeg to GVN pass (authored by mcinally, committed by ).
Changed prior to commit:
https://reviews.llvm.org/D63896?vs=206924&id=206932#toc
Repository:
rL LLVM
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D63896/new/
https://reviews.llvm.org/D63896
Files:
llvm/trunk/lib/Transforms/Scalar/GVN.cpp
llvm/trunk/test/Transforms/GVN/fpmath.ll
Index: llvm/trunk/lib/Transforms/Scalar/GVN.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Scalar/GVN.cpp
+++ llvm/trunk/lib/Transforms/Scalar/GVN.cpp
@@ -492,6 +492,7 @@
switch (I->getOpcode()) {
case Instruction::Call:
return lookupOrAddCall(cast<CallInst>(I));
+ case Instruction::FNeg:
case Instruction::Add:
case Instruction::FAdd:
case Instruction::Sub:
Index: llvm/trunk/test/Transforms/GVN/fpmath.ll
===================================================================
--- llvm/trunk/test/Transforms/GVN/fpmath.ll
+++ llvm/trunk/test/Transforms/GVN/fpmath.ll
@@ -43,9 +43,8 @@
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
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