Revert the assert for MUL_LOHI with an unused high result; Chris

pointed out that this isn't correct at -O0.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47575 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index af6576b83a441030ac5b9f3eb3c1eaec2c9659a8..75e9faecb290b3f72e95c2b170acf1e94153e1c1 100644 (file)
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -1221,9 +1221,6 @@ SDNode *X86DAGToDAGISel::Select(SDOperand N) {
 
     case ISD::SMUL_LOHI:
     case ISD::UMUL_LOHI: {
-      assert(!N.getValue(1).use_empty() &&
-             "A MUL_LOHI with an unused high result should fold to a MUL!");
-
       SDOperand N0 = Node->getOperand(0);
       SDOperand N1 = Node->getOperand(1);