6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

bug 122:

Browse Source 
- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14942 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2004-07-18 00:18:30 +00:00
parent e0125b6785
commit e840434755
10 changed files with 48 additions and 78 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
lib/Analysis/BasicAliasAnalysis.cpp
View File

@@ -143,8 +143,8 @@ static const Value *getUnderlyingObject(const Value *V) {
if (CE->getOpcode() == Instruction::Cast ||
CE->getOpcode() == Instruction::GetElementPtr)
return getUnderlyingObject(CE->getOperand(0));
} else if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(V)) {
return CPR->getValue();
} else if (const GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
return GV;
}
return 0;
}
@@ -166,7 +166,7 @@ static const Value *GetGEPOperands(const Value *V, std::vector<Value*> &GEPOps){
V = cast<User>(V)->getOperand(0);
while (const User *G = isGEP(V)) {
if (!isa<Constant>(GEPOps[0]) ||
if (!isa<Constant>(GEPOps[0]) || isa<GlobalValue>(GEPOps[0]) ||
!cast<Constant>(GEPOps[0])->isNullValue())
break; // Don't handle folding arbitrary pointer offsets yet...
GEPOps.erase(GEPOps.begin()); // Drop the zero index
@@ -217,7 +217,7 @@ static bool AddressMightEscape(const Value *V) {
//
AliasAnalysis::ModRefResult
BasicAliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) {
if (!isa<Constant>(P) && !isa<GlobalValue>(P))
if (!isa<Constant>(P))
if (const AllocationInst *AI =
dyn_cast_or_null<AllocationInst>(getUnderlyingObject(P))) {
// Okay, the pointer is to a stack allocated object. If we can prove that
@@ -246,12 +246,6 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
if (CE->getOpcode() == Instruction::Cast)
V2 = CE->getOperand(0);
// Strip off constant pointer refs if they exist
if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(V1))
V1 = CPR->getValue();
if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(V2))
V2 = CPR->getValue();
// Are we checking for alias of the same value?
if (V1 == V2) return MustAlias;
@@ -380,7 +374,7 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
// the arguments provided, except substitute 0's for any variable
// indexes we find...
for (unsigned i = 0; i != GEPOperands.size(); ++i)
if (!isa<Constant>(GEPOperands[i]) ||
if (!isa<Constant>(GEPOperands[i]) || isa<GlobalValue>(GEPOperands[i]) ||
isa<ConstantExpr>(GEPOperands[i]))
GEPOperands[i] =Constant::getNullValue(GEPOperands[i]->getType());
int64_t Offset = getTargetData().getIndexedOffset(BasePtr->getType(),
@@ -453,7 +447,7 @@ CheckGEPInstructions(const Type* BasePtr1Ty, std::vector<Value*> &GEP1Ops,
bool AllAreZeros = true;
for (unsigned i = UnequalOper; i != MaxOperands; ++i)
if (!isa<Constant>(GEP1Ops[i]) ||
if (!isa<Constant>(GEP1Ops[i]) ||
!cast<Constant>(GEP1Ops[i])->isNullValue()) {
AllAreZeros = false;
break;