[PATCH] D61910: Support FNeg in SpeculativeExecution pass

[Cameron McInally via Phabricator via llvm-commits]

cameron.mcinally created this revision.
cameron.mcinally added reviewers: spatel, arsenm, kpn, craig.topper, andrew.w.kaylor.
Herald added subscribers: llvm-commits, hiraditya, wdng.
Herald added a project: LLVM.

Repository:
  rL LLVM

https://reviews.llvm.org/D61910

Files:
  llvm/lib/Transforms/Scalar/SpeculativeExecution.cpp
  llvm/test/Transforms/SpeculativeExecution/spec-fp.ll


Index: llvm/test/Transforms/SpeculativeExecution/spec-fp.ll
===================================================================
--- llvm/test/Transforms/SpeculativeExecution/spec-fp.ll
+++ llvm/test/Transforms/SpeculativeExecution/spec-fp.ll
@@ -30,10 +30,10 @@
   ret void
 }
 
-; CHECK-LABEL: @ifThen_fneg(
+; CHECK-LABEL: @ifThen_binary_fneg(
 ; CHECK: fsub float -0.0
 ; CHECK: br i1 true
-define void @ifThen_fneg() {
+define void @ifThen_binary_fneg() {
   br i1 true, label %a, label %b
 
 a:
@@ -44,6 +44,20 @@
   ret void
 }
 
+; CHECK-LABEL: @ifThen_unary_fneg(
+; CHECK: fneg float
+; CHECK: br i1 true
+define void @ifThen_unary_fneg() {
+  br i1 true, label %a, label %b
+
+a:
+  %x = fneg float undef
+  br label %b
+
+b:
+  ret void
+}
+
 ; CHECK-LABEL: @ifThen_fmul(
 ; CHECK: fmul
 ; CHECK: br i1 true
Index: llvm/lib/Transforms/Scalar/SpeculativeExecution.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/SpeculativeExecution.cpp
+++ llvm/lib/Transforms/Scalar/SpeculativeExecution.cpp
@@ -240,6 +240,7 @@
     case Instruction::FMul:
     case Instruction::FDiv:
     case Instruction::FRem:
+    case Instruction::FNeg:
     case Instruction::ICmp:
     case Instruction::FCmp:
       return TTI.getUserCost(I);


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