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PR 770 - permit coallescing of registers in subset register classes.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@28197 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2006-05-09 06:37:48 +00:00
parent 696736be8b
commit e73701df94
2 changed files with 30 additions and 16 deletions
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8
include/llvm/CodeGen/LiveIntervalAnalysis.h
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@@ -167,9 +167,11 @@ namespace llvm {
unsigned SrcReg, unsigned DestReg,
bool isLiveIn = false);
/// Return true if the two specified registers belong to different
/// register classes. The registers may be either phys or virt regs.
bool differingRegisterClasses(unsigned RegA, unsigned RegB) const;
/// Return true if the two specified registers belong to the same or
/// compatible register classes. The registers may be either phys or
/// virt regs.
bool compatibleRegisterClasses(unsigned RegA, unsigned RegB,
bool &Swap) const;
bool AdjustIfAllOverlappingRangesAreCopiesFrom(LiveInterval &IntA,
LiveInterval &IntB,