diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-02-23 22:43:58 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-02-23 22:43:58 +0000 |
| commit | dcfe5f30b5e262971f601a65bebcc0367fef56c5 (patch) | |
| tree | db54351e744e003a9572e503b6b394cf60a99ac5 /lib/CodeGen/PHIElimination.cpp | |
| parent | 01be611b8223c80305c7c1ce5d9bd578abc844ed (diff) | |
| download | llvm-dcfe5f30b5e262971f601a65bebcc0367fef56c5.tar.gz llvm-dcfe5f30b5e262971f601a65bebcc0367fef56c5.tar.bz2 llvm-dcfe5f30b5e262971f601a65bebcc0367fef56c5.tar.xz | |
Keep track of phi join registers explicitly in LiveVariables.
Previously, LiveIntervalAnalysis would infer phi joins by looking for multiply
defined registers. That doesn't work if the phi join is implicitly defined in
all but one of the predecessors.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96994 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/PHIElimination.cpp')
| -rw-r--r-- | lib/CodeGen/PHIElimination.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/CodeGen/PHIElimination.cpp b/lib/CodeGen/PHIElimination.cpp index 9e4bc0c273..bdfd448acd 100644 --- a/lib/CodeGen/PHIElimination.cpp +++ b/lib/CodeGen/PHIElimination.cpp @@ -223,6 +223,7 @@ void llvm::PHIElimination::LowerAtomicPHINode( // Increment use count of the newly created virtual register. VI.NumUses++; + LV->setPHIJoin(IncomingReg); // When we are reusing the incoming register, it may already have been // killed in this block. The old kill will also have been inserted at |