commit 0cec956d814123140759cd25fec8f07e65b43849
author Evan Cheng <evan.cheng@apple.com> Wed Mar 12 02:05:05 2008 +0000
committer Evan Cheng <evan.cheng@apple.com> Wed Mar 12 02:05:05 2008 +0000
tree bf8d3d21fb3b555a5c6ee2d0ffb7e9c1877304eb
parent d5f1627d2c6b96a3fc4dc3025043912fb7b00687

Total brain cramp.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48274 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/DAGCombiner.cpp

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 4592971..5a6077a 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -1103,7 +1103,7 @@
   
   // fold (sub x, x) -> 0
   if (N0 == N1) {
-    if (!AfterLegalize || !MVT::isVector(VT))
+    if (AfterLegalize && ISD::isBuildVectorAllZeros(N0.Val))
       // For example, zero vectors might be normalized to a particular vector
       // type to ensure they are CSE'd. Avoid issuing zero vector nodes of
       // *unexpected* type after legalization.