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Make query operations non-const to allow demand-driven analyses.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4569 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2002-11-06 17:17:55 +00:00
parent 5f76054a79
commit 75310d59c9
3 changed files with 13 additions and 13 deletions
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10
include/llvm/Analysis/AliasAnalysis.h
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@ -34,22 +34,22 @@ struct AliasAnalysis {
/// other. This is the interface that must be implemented by specific alias
/// analysis implementations.
///
virtual Result alias(const Value *V1, const Value *V2) const = 0;
virtual Result alias(const Value *V1, const Value *V2) = 0;
/// canCallModify - Return a Result that indicates whether the specified
/// function call can modify the memory location pointed to by Ptr.
///
virtual Result canCallModify(const CallInst &CI, const Value *Ptr) const = 0;
virtual Result canCallModify(const CallInst &CI, const Value *Ptr) = 0;
/// canInvokeModify - Return a Result that indicates whether the specified
/// function invoke can modify the memory location pointed to by Ptr.
///
virtual Result canInvokeModify(const InvokeInst &I, const Value *Ptr) const=0;
virtual Result canInvokeModify(const InvokeInst &I, const Value *Ptr) = 0;
/// canBasicBlockModify - Return true if it is possible for execution of the
/// specified basic block to modify the value pointed to by Ptr.
///
bool canBasicBlockModify(const BasicBlock &BB, const Value *Ptr) const;
bool canBasicBlockModify(const BasicBlock &BB, const Value *Ptr);
/// canInstructionRangeModify - Return true if it is possible for the
/// execution of the specified instructions to modify the value pointed to by
@ -57,7 +57,7 @@ struct AliasAnalysis {
/// range of [I1,I2] INCLUSIVE. I1 and I2 must be in the same basic block.
///
bool canInstructionRangeModify(const Instruction &I1, const Instruction &I2,
const Value *Ptr) const;
const Value *Ptr);
virtual ~AliasAnalysis(); // We want to be subclassed
};

6
include/llvm/Analysis/BasicAliasAnalysis.h
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@ -16,17 +16,17 @@ struct BasicAliasAnalysis : public ImmutablePass, public AliasAnalysis {
// alias - This is the only method here that does anything interesting...
//
Result alias(const Value *V1, const Value *V2) const;
Result alias(const Value *V1, const Value *V2);
/// canCallModify - We are not interprocedural, so we do nothing exciting.
///
Result canCallModify(const CallInst &CI, const Value *Ptr) const {
Result canCallModify(const CallInst &CI, const Value *Ptr) {
return MayAlias;
}
/// canInvokeModify - We are not interprocedural, so we do nothing exciting.
///
Result canInvokeModify(const InvokeInst &I, const Value *Ptr) const {
Result canInvokeModify(const InvokeInst &I, const Value *Ptr) {
return MayAlias; // We are not interprocedural
}
};

10
lib/Analysis/AliasAnalysis.cpp
View File

@ -34,10 +34,10 @@ static RegisterAnalysisGroup<AliasAnalysis> X("Alias Analysis");
//
namespace {
struct CanModify : public InstVisitor<CanModify, bool> {
const AliasAnalysis &AA;
AliasAnalysis &AA;
const Value *Ptr;
CanModify(const AliasAnalysis *aa, const Value *ptr)
CanModify(AliasAnalysis *aa, const Value *ptr)
: AA(*aa), Ptr(ptr) {}
bool visitInvokeInst(InvokeInst &II) {
@ -66,7 +66,7 @@ AliasAnalysis::~AliasAnalysis() {}
/// specified basic block to modify the value pointed to by Ptr.
///
bool AliasAnalysis::canBasicBlockModify(const BasicBlock &bb,
const Value *Ptr) const {
const Value *Ptr) {
CanModify CM(this, Ptr);
BasicBlock &BB = const_cast<BasicBlock&>(bb);
@ -84,7 +84,7 @@ bool AliasAnalysis::canBasicBlockModify(const BasicBlock &bb,
///
bool AliasAnalysis::canInstructionRangeModify(const Instruction &I1,
const Instruction &I2,
const Value *Ptr) const {
const Value *Ptr) {
assert(I1.getParent() == I2.getParent() &&
"Instructions not in same basic block!");
CanModify CM(this, Ptr);
@ -144,7 +144,7 @@ static const Value *getUnderlyingObject(const Value *V) {
// Hopefully we have a smart C++ compiler. :)
//
AliasAnalysis::Result BasicAliasAnalysis::alias(const Value *V1,
const Value *V2) const {
const Value *V2) {
// Strip off constant pointer refs if they exist
if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(V1))
V1 = CPR->getValue();