diff options
| author | Chris Lattner <sabre@nondot.org> | 2003-06-24 20:29:52 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2003-06-24 20:29:52 +0000 |
| commit | 38b5ae4b4847196f5ec53551cf8040ba0b5fb11d (patch) | |
| tree | 1853c6618e9c7b62451e12887a824a41eb119b76 /lib/Transforms | |
| parent | 1e3af1ef873c0fb5dc6c4ba4e51ef98ced72dce0 (diff) | |
Fix bug: SCCP/2003-06-24-OverdefinedPHIValue.ll
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6883 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/SCCP.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index 4463a7fc44..df55037c52 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++ b/lib/Transforms/Scalar/SCCP.cpp @@ -420,12 +420,13 @@ void SCCP::visitPHINode(PHINode &PN) { for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i) { InstVal &IV = getValueState(PN.getIncomingValue(i)); if (IV.isUndefined()) continue; // Doesn't influence PHI node. - if (IV.isOverdefined()) { // PHI node becomes overdefined! - markOverdefined(&PN); - return; - } if (isEdgeFeasible(PN.getIncomingBlock(i), PN.getParent())) { + if (IV.isOverdefined()) { // PHI node becomes overdefined! + markOverdefined(&PN); + return; + } + if (OperandVal == 0) { // Grab the first value... OperandVal = IV.getConstant(); } else { // Another value is being merged in! |