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| author | Dan Gohman <gohman@apple.com> | 2008-02-25 22:15:55 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-02-25 22:15:55 +0000 |
| commit | 0be2f3b941ba529a1af1d4ff5e245c59feb2187e (patch) | |
| tree | 1b7c65da233892224ce617801e8d6b8f39c75647 | |
| parent | 0992b38a78f91f1f42fac0fa943619cc8e03847d (diff) | |
| download | bcm5719-llvm-0be2f3b941ba529a1af1d4ff5e245c59feb2187e.tar.gz bcm5719-llvm-0be2f3b941ba529a1af1d4ff5e245c59feb2187e.zip | |
Add an assert to verify that we don't see an
{S,U}MUL_LOHI with an unused high value.
llvm-svn: 47569
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp index 75e9faecb29..af6576b83a4 100644 --- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -1221,6 +1221,9 @@ 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); |
