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Commented out code so that copies are inserted for all phi args

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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
This commit is contained in:
Ruchira Sasanka 2001-11-03 17:09:59 +00:00
parent 0f279b245d
commit fca59d7dc9
1 changed files with 19 additions and 8 deletions
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27
lib/Transforms/HoistPHIConstants.cpp
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@ -6,6 +6,9 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/HoistPHIConstants.h"
#include "llvm/iOther.h"
#include "llvm/BasicBlock.h"
@ -18,15 +21,20 @@ typedef map<BBConstTy, CastInst *> CachedCopyMap;
static Value *NormalizePhiOperand(PHINode *PN, Value *CPV,
BasicBlock *Pred, CachedCopyMap &CopyCache) {
/* NOTE: CahedCopyMap was disabled to insert phi elimination code
for all phi args -- Ruchira
*/
// Check if we've already inserted a copy for this constant in Pred
// Note that `copyCache[Pred]' will create an empty vector the first time
//
CachedCopyMap::iterator CCI = CopyCache.find(BBConstTy(Pred, CPV));
if (CCI != CopyCache.end()) return CCI->second;
//CachedCopyMap::iterator CCI = CopyCache.find(BBConstTy(Pred, CPV));
//if (CCI != CopyCache.end()) return CCI->second;
// Create a copy instruction and add it to the cache...
CastInst *Inst = new CastInst(CPV, CPV->getType());
CopyCache.insert(make_pair(BBConstTy(Pred, CPV), Inst));
//CopyCache.insert(make_pair(BBConstTy(Pred, CPV), Inst));
// Insert the copy just before the terminator inst of the predecessor BB
assert(Pred->getTerminator() && "Degenerate BB encountered!");
@ -52,11 +60,14 @@ bool HoistPHIConstants::doHoistPHIConstants(Method *M) {
PHINode *PN = cast<PHINode>(Inst);
for (unsigned i = 0; i < PN->getNumIncomingValues(); ++i) {
Value *Op = PN->getIncomingValue(i);
if (isa<ConstPoolVal>(Op)) {
PN->setIncomingValue(i,
NormalizePhiOperand(PN, Op, PN->getIncomingBlock(i), Cache));
Changed = true;
}
//if (isa<ConstPoolVal>(Op)) { --- Do for all phi args -- Ruchira
PN->setIncomingValue(i,
NormalizePhiOperand(PN, Op, PN->getIncomingBlock(i), Cache));
Changed = true;
//}
}
}