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| author | Ruchira Sasanka <sasanka@students.uiuc.edu> | 2001-10-12 17:48:18 +0000 |
|---|---|---|
| committer | Ruchira Sasanka <sasanka@students.uiuc.edu> | 2001-10-12 17:48:18 +0000 |
| commit | 7c10e086ebf7bc5d4050845cb4132aef42758bc3 (patch) | |
| tree | 6fb23ecd8aed6fb419c965adb559c362608ec369 /llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp | |
| parent | 04009efe4819d2f3ceae420e330198e8a7620cfe (diff) | |
| download | bcm5719-llvm-7c10e086ebf7bc5d4050845cb4132aef42758bc3.tar.gz bcm5719-llvm-7c10e086ebf7bc5d4050845cb4132aef42758bc3.zip | |
--corrected coalescing test: coalsed only if two are of the same reg class
llvm-svn: 729
Diffstat (limited to 'llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp b/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp index 4d3e925382a..242b30cc57b 100644 --- a/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp +++ b/llvm/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp @@ -110,6 +110,7 @@ void LiveRangeInfo::constructLiveRanges() // Now if the machine instruction has special operands that must be // set with a "suggested color", do it here. + // This will be true for call/return instructions if( MRI.handleSpecialMInstr(MInst, *this, RegClassList) ) @@ -254,7 +255,7 @@ 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 type + if the def and op are of the same register class 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 @@ -313,12 +314,11 @@ 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( LROfUse->getTypeID() == LROfDef->getTypeID() ) { + // if( LROfUse->getTypeID() == LROfDef->getTypeID() ) { if( ! RCOfDef->getInterference(LROfDef, LROfUse) ) { @@ -341,7 +341,7 @@ void LiveRangeInfo::coalesceLRs() } // if def and use do not interfere - } // if reg classes are the same + }// if reg classes are the same } // for all uses |
