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Coalesing bug fix - now checks for the same regType instead of the same 

regClass since FP class has two reg Types.

llvm-svn: 1236
This commit is contained in:
Ruchira Sasanka 2001-11-10 00:20:24 +00:00
parent d499a26116
commit 31305c0d57
1 changed files with 6 additions and 3 deletions
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9
llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp
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@ -253,7 +253,7 @@ void LiveRangeInfo::coalesceLRs()
for each machine instruction (inst)
for each definition (def) in inst
for each operand (op) of inst that is a use
if the def and op are of the same register class
if the def and op are of the same register type
if the def and op do not interfere //i.e., not simultaneously live
if (degree(LR of def) + degree(LR of op)) <= # avail regs
if both LRs do not have suggested colors
@ -312,9 +312,12 @@ void LiveRangeInfo::coalesceLRs()
if( LROfUse == LROfDef) // nothing to merge if they are same
continue;
RegClass *const RCOfUse = LROfUse->getRegClass();
//RegClass *const RCOfUse = LROfUse->getRegClass();
//if( RCOfDef == RCOfUse ) { // if the reg classes are the same
if( RCOfDef == RCOfUse ) { // if the reg classes are the same
if( MRI.getRegType(LROfDef) == MRI.getRegType(LROfUse) ) {
// If the two RegTypes are the same
if( ! RCOfDef->getInterference(LROfDef, LROfUse) ) {