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| author | Devang Patel <dpatel@apple.com> | 2007-03-28 14:57:43 +0000 |
|---|---|---|
| committer | Devang Patel <dpatel@apple.com> | 2007-03-28 14:57:43 +0000 |
| commit | 9dea3a340a8e3db7eab92ea78c20e317ac4c2545 (patch) | |
| tree | 988d781f4d25793ea7be0a0da19045e3099fa10c /lib/VMCore/Dominators.cpp | |
| parent | e82fca09bffc73310499bdcfbdea87a095420e09 (diff) | |
| download | llvm-9dea3a340a8e3db7eab92ea78c20e317ac4c2545.tar.gz llvm-9dea3a340a8e3db7eab92ea78c20e317ac4c2545.tar.bz2 llvm-9dea3a340a8e3db7eab92ea78c20e317ac4c2545.tar.xz | |
It is not possible to determine dominance between two PHI nodes
based on their ordering. This is applicable to ETForest::dominates() also.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35423 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/VMCore/Dominators.cpp')
| -rw-r--r-- | lib/VMCore/Dominators.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/VMCore/Dominators.cpp b/lib/VMCore/Dominators.cpp index 1421cf14e7..9bd51bf4d9 100644 --- a/lib/VMCore/Dominators.cpp +++ b/lib/VMCore/Dominators.cpp @@ -952,6 +952,11 @@ bool ETForestBase::dominates(Instruction *A, Instruction *B) { BasicBlock::iterator I = BBA->begin(); for (; &*I != A && &*I != B; ++I) /*empty*/; + // It is not possible to determine dominance between two PHI nodes + // based on their ordering. + if (isa<PHINode>(A) && isa<PHINode>(B)) + return false; + if(!IsPostDominators) { // A dominates B if it is found first in the basic block. return &*I == A; |