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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-10-01 23:52:25 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-10-01 23:52:25 +0000 |
| commit | e0a73ec0a982a4213f3de9860545d9bf2814593d (patch) | |
| tree | 92d56c1b7c96ef12f00aa455a10f472b4f807e7c /lib/CodeGen/LiveInterval.cpp | |
| parent | a9b85c1074dd91ef6702b4c13499c5900616ad02 (diff) | |
| download | llvm-e0a73ec0a982a4213f3de9860545d9bf2814593d.tar.gz llvm-e0a73ec0a982a4213f3de9860545d9bf2814593d.tar.bz2 llvm-e0a73ec0a982a4213f3de9860545d9bf2814593d.tar.xz | |
When RemoveCopyByCommutingDef is creating additional identity copies, just use
LiveInterval::MergeValueNumberInto instead of trying to extend LiveRanges and
getting it wrong.
This fixed PR8249 where a valno with a multi-segment live range was defined by
an identity copy created by RemoveCopyByCommutingDef. Some of the live
segments disappeared.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115385 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveInterval.cpp')
| -rw-r--r-- | lib/CodeGen/LiveInterval.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp index b4f0a94e97..e18d7c7858 100644 --- a/lib/CodeGen/LiveInterval.cpp +++ b/lib/CodeGen/LiveInterval.cpp @@ -582,6 +582,9 @@ VNInfo* LiveInterval::MergeValueNumberInto(VNInfo *V1, VNInfo *V2) { } } + // Merge the relevant flags. + V2->mergeFlags(V1); + // Now that V1 is dead, remove it. markValNoForDeletion(V1); |