Check for less than 0 in shuffle mask instead of -1. It's more consistent with other...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172788 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/InstCombine/InstCombineVectorOps.cpp b/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
index 1bbedb8e9d04dde217c636a83bf6473ad873b996..4f71db1a4b097cf363e197459b61c707ee5185d0 100644 (file)
--- a/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
+++ b/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
@@ -604,7 +604,7 @@ Instruction *InstCombiner::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
   // ShuffleVectorInst is equivalent to the original one.
   for (unsigned i = 0; i < VWidth; ++i) {
     int eltMask;
-    if (Mask[i] == -1) {
+    if (Mask[i] < 0) {
       // This element is an undef value.
       eltMask = -1;
     } else if (Mask[i] < (int)LHSWidth) {