diff options
Diffstat (limited to 'lib/Analysis')
| -rw-r--r-- | lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp b/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp index 63c20194df..0e8e0ac41b 100644 --- a/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp +++ b/lib/Analysis/LiveVar/FunctionLiveVarInfo.cpp @@ -180,28 +180,29 @@ void FunctionLiveVarInfo::releaseMemory() { const ValueSet & FunctionLiveVarInfo::getLiveVarSetBeforeMInst(const MachineInstr *MInst, const BasicBlock *BB) { - if (const ValueSet *LVSet = MInst2LVSetBI[MInst]) { - return *LVSet; // if found, just return the set - } else { - calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB - return *MInst2LVSetBI[MInst]; + const ValueSet *LVSet = MInst2LVSetBI[MInst]; + if (LVSet == NULL && BB != NULL) { // if not found and BB provided + calcLiveVarSetsForBB(BB); // calc LVSet for all instrs in BB + LVSet = MInst2LVSetBI[MInst]; } + return *LVSet; } //----------------------------------------------------------------------------- // Gives live variable information after a machine instruction //----------------------------------------------------------------------------- + const ValueSet & FunctionLiveVarInfo::getLiveVarSetAfterMInst(const MachineInstr *MI, const BasicBlock *BB) { - if (const ValueSet *LVSet = MInst2LVSetAI[MI]) { - return *LVSet; // if found, just return the set - } else { - calcLiveVarSetsForBB(BB); // else, calc for all instrs in BB + const ValueSet *LVSet = MInst2LVSetAI[MI]; + if (LVSet == NULL && BB != NULL) { // if not found and BB provided + calcLiveVarSetsForBB(BB); // calc LVSet for all instrs in BB return *MInst2LVSetAI[MI]; } + return *LVSet; } // This function applies a machine instr to a live var set (accepts OutSet) and |