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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89990 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2009-11-27 05:19:56 +00:00
parent 518c988ae9
commit cca130bb66
2 changed files with 12 additions and 13 deletions
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13
lib/Analysis/MemoryDependenceAnalysis.cpp
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@ -700,7 +700,6 @@ static bool isPHITranslatable(Instruction *Inst) {
// We can translate a GEP that uses a PHI in the current block for at least
// one of its operands.
if (0)
if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Inst)) {
for (unsigned i = 0, e = GEP->getNumOperands(); i != e; ++i)
if (PHINode *PN = dyn_cast<PHINode>(GEP->getOperand(i)))
@ -747,11 +746,11 @@ static Value *PHITranslateForPred(Instruction *Inst, BasicBlock *Pred,
if (GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(Inst)) {
SmallVector<Value*, 8> GEPOps;
Value *APHIOp = 0;
BasicBlock *CurBB = GEP->getParent();
for (unsigned i = 0, e = GEP->getNumOperands(); i != e; ++i) {
GEPOps.push_back(GEP->getOperand(i));
if (PHINode *PN = dyn_cast<PHINode>(GEP->getOperand(i)))
if (PN->getParent() == GEP->getParent())
GEPOps.back() = APHIOp = PN->getIncomingValueForBlock(Pred);
GEPOps.push_back(GEP->getOperand(i)->DoPHITranslation(CurBB, Pred));
if (!isa<Constant>(GEPOps.back()))
APHIOp = GEPOps.back();
}
// Simplify the GEP to handle 'gep x, 0' -> x etc.
@ -762,9 +761,9 @@ static Value *PHITranslateForPred(Instruction *Inst, BasicBlock *Pred,
for (Value::use_iterator UI = APHIOp->use_begin(), E = APHIOp->use_end();
UI != E; ++UI) {
if (GetElementPtrInst *GEPI = dyn_cast<GetElementPtrInst>(*UI))
if (GEPI->getType() == GEPI->getType() &&
if (GEPI->getType() == GEP->getType() &&
GEPI->getNumOperands() == GEPOps.size() &&
GEPI->getParent()->getParent() == Inst->getParent()->getParent()) {
GEPI->getParent()->getParent() == CurBB->getParent()) {
bool Mismatch = false;
for (unsigned i = 0, e = GEPOps.size(); i != e; ++i)
if (GEPI->getOperand(i) != GEPOps[i]) {

12
test/Transforms/GVN/rle-phi-translate.ll
View File

@ -80,9 +80,9 @@ bb2:
%i = phi i32 [ 7, %bb1 ], [ 17, %bb ]
%d1 = getelementptr i32* %d, i32 %i
%dv = load i32* %d1
; HECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
; HECK-NOT: load
; HECK: ret i32 %dv
; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
; CHECK-NOT: load
; CHECK: ret i32 %dv
ret i32 %dv
}
@ -106,9 +106,9 @@ bb2:
%i = phi i32 [ 7, %bb1 ], [ 0, %bb ]
%d1 = getelementptr i32* %d, i32 %i
%dv = load i32* %d1
; HECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
; HECK-NOT: load
; HECK: ret i32 %dv
; CHECK: %dv = phi i32 [ 82, %bb1 ], [ 4, %bb ]
; CHECK-NOT: load
; CHECK: ret i32 %dv
ret i32 %dv
}