commit 18b3da6c34679cefc9a792f124c16b60097f2740
author Nick Lewycky <nicholas@mxc.ca> Fri May 23 04:54:45 2008 +0000
committer Nick Lewycky <nicholas@mxc.ca> Fri May 23 04:54:45 2008 +0000
tree c7f97792d3b947c7216acc810a5aacc05b3c1f8d
parent 7d26bd8e9777a37ccf5845f8365c3ccd6c498802

Constant integer vectors may also be negated.


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

lib/Transforms/Scalar/InstructionCombining.cpp

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 @@
   // 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;
 }