diff options
| 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 /include/llvm/CodeGen/LiveInterval.h | |
| 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 'include/llvm/CodeGen/LiveInterval.h')
| -rw-r--r-- | include/llvm/CodeGen/LiveInterval.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h index 706d449516..720fb830e4 100644 --- a/include/llvm/CodeGen/LiveInterval.h +++ b/include/llvm/CodeGen/LiveInterval.h @@ -81,6 +81,11 @@ namespace llvm { unsigned getFlags() const { return flags; } void setFlags(unsigned flags) { this->flags = flags; } + /// Merge flags from another VNInfo + void mergeFlags(const VNInfo *VNI) { + flags = (flags | VNI->flags) & ~IS_UNUSED; + } + /// For a register interval, if this VN was definied by a copy instr /// getCopy() returns a pointer to it, otherwise returns 0. /// For a stack interval the behaviour of this method is undefined. |