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Commented out code so that copies are inserted for all phi args
CahedCopyMap was disabled to insert phi elimination code for all phi args git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1105 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -6,6 +6,9 @@
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Transforms/HoistPHIConstants.h"
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#include "llvm/iOther.h"
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#include "llvm/BasicBlock.h"
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@ -18,15 +21,20 @@ typedef map<BBConstTy, CastInst *> CachedCopyMap;
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static Value *NormalizePhiOperand(PHINode *PN, Value *CPV,
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BasicBlock *Pred, CachedCopyMap &CopyCache) {
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/* NOTE: CahedCopyMap was disabled to insert phi elimination code
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for all phi args -- Ruchira
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*/
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// Check if we've already inserted a copy for this constant in Pred
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// Note that `copyCache[Pred]' will create an empty vector the first time
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//
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CachedCopyMap::iterator CCI = CopyCache.find(BBConstTy(Pred, CPV));
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if (CCI != CopyCache.end()) return CCI->second;
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//CachedCopyMap::iterator CCI = CopyCache.find(BBConstTy(Pred, CPV));
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//if (CCI != CopyCache.end()) return CCI->second;
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// Create a copy instruction and add it to the cache...
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CastInst *Inst = new CastInst(CPV, CPV->getType());
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CopyCache.insert(make_pair(BBConstTy(Pred, CPV), Inst));
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//CopyCache.insert(make_pair(BBConstTy(Pred, CPV), Inst));
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// Insert the copy just before the terminator inst of the predecessor BB
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assert(Pred->getTerminator() && "Degenerate BB encountered!");
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@ -52,11 +60,14 @@ bool HoistPHIConstants::doHoistPHIConstants(Method *M) {
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PHINode *PN = cast<PHINode>(Inst);
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for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i) {
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Value *Op = PN->getIncomingValue(i);
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if (isa<ConstPoolVal>(Op)) {
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PN->setIncomingValue(i,
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NormalizePhiOperand(PN, Op, PN->getIncomingBlock(i), Cache));
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Changed = true;
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}
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//if (isa<ConstPoolVal>(Op)) { --- Do for all phi args -- Ruchira
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PN->setIncomingValue(i,
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NormalizePhiOperand(PN, Op, PN->getIncomingBlock(i), Cache));
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Changed = true;
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//}
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}
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}
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