Constant integer vectors may also be negated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51476 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index ce5f239..d7f5ccf 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -550,6 +550,11 @@ static inline Value *dyn_castNegVal(Value *V) {
   // Constants can be considered to be negated values if they can be folded.
   if (ConstantInt *C = dyn_cast<ConstantInt>(V))
     return ConstantExpr::getNeg(C);
+
+  if (ConstantVector *C = dyn_cast<ConstantVector>(V))
+    if (C->getType()->getElementType()->isInteger())
+      return ConstantExpr::getNeg(C);
+
   return 0;
 }