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When coalescing an EXTRACT_SUBREG and the dst register is a physical register,

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the source register will be coalesced to the super register of the LHS. Properly
merge in the live ranges of the resulting coalesced interval that were part of
the original source interval to the live interval of the super-register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42961 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2007-10-14 10:08:34 +00:00
parent 347d39f1fd
commit 34729256e8
3 changed files with 29 additions and 27 deletions
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2
lib/CodeGen/LiveInterval.cpp
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@ -389,7 +389,7 @@ void LiveInterval::MergeRangesInAsValue(const LiveInterval &RHS,
/// current interval, but only if the overlapping LiveRanges have the
/// specified value number.
void LiveInterval::MergeValueInAsValue(const LiveInterval &RHS,
VNInfo *RHSValNo, VNInfo *LHSValNo) {
const VNInfo *RHSValNo, VNInfo *LHSValNo) {
// TODO: Make this more efficient.
iterator InsertPos = begin();
for (const_iterator I = RHS.begin(), E = RHS.end(); I != E; ++I) {