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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 | c2d9b5fcdfcfaa40b8d8b85b3ff46ab0dfebd619 (patch) | |
| tree | 40733c0c01e61265aed747822a808198cea08b72 /lib/Target/X86/X86ISelDAGToDAG.cpp | |
| parent | fcf81db600385be24baae2dd1c1994150e409a7b (diff) | |
| download | llvm-c2d9b5fcdfcfaa40b8d8b85b3ff46ab0dfebd619.tar.gz llvm-c2d9b5fcdfcfaa40b8d8b85b3ff46ab0dfebd619.tar.bz2 llvm-c2d9b5fcdfcfaa40b8d8b85b3ff46ab0dfebd619.tar.xz | |
Add an assert to verify that we don't see an
{S,U}MUL_LOHI with an unused high value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47569 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86ISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelDAGToDAG.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp index 75e9faecb2..af6576b83a 100644 --- a/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/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); |