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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 | d33238bb7b6ba1606061a6108e791339b8576c46 (patch) | |
| tree | 4a27327a1dee2935dca2a51d28715123516d9834 /lib/CodeGen/RegAlloc/LiveRangeInfo.cpp | |
| parent | c1daae895d278c0be7af25e1029ece8f2a3fa30c (diff) | |
--corrected coalescing test: coalsed only if two are of the same reg class
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@729 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegAlloc/LiveRangeInfo.cpp')
| -rw-r--r-- | lib/CodeGen/RegAlloc/LiveRangeInfo.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp b/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp index 4d3e925382..242b30cc57 100644 --- a/lib/CodeGen/RegAlloc/LiveRangeInfo.cpp +++ b/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 |