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Make BasicAliasAnalysis a normal AliasAnalysis implementation which

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does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-10-18 18:04:47 +00:00
parent 9baee3b3a3
commit c1be92f3bb
81 changed files with 115 additions and 91 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/Analysis/BasicAliasAnalysis.cpp
+25 -11
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@@ -190,7 +190,7 @@ namespace {
char NoAA::ID = 0;
INITIALIZE_AG_PASS(NoAA, AliasAnalysis, "no-aa",
"No Alias Analysis (always returns 'may' alias)",
true, true, false)
true, true, true)
ImmutablePass *llvm::createNoAAPass() { return new NoAA(); }
@@ -492,6 +492,14 @@ namespace {
static char ID; // Class identification, replacement for typeinfo
BasicAliasAnalysis() : NoAA(ID) {}
virtual void initializePass() {
InitializeAliasAnalysis(this);
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<AliasAnalysis>();
}
virtual AliasResult alias(const Location &LocA,
const Location &LocB) {
assert(Visited.empty() && "Visited must be cleared after use!");
@@ -561,7 +569,7 @@ namespace {
char BasicAliasAnalysis::ID = 0;
INITIALIZE_AG_PASS(BasicAliasAnalysis, AliasAnalysis, "basicaa",
"Basic Alias Analysis (default AA impl)",
false, true, true)
false, true, false)
ImmutablePass *llvm::createBasicAliasAnalysisPass() {
return new BasicAliasAnalysis();
@@ -578,7 +586,7 @@ bool BasicAliasAnalysis::pointsToConstantMemory(const Location &Loc) {
// GV may even be a declaration, not a definition.
return GV->isConstant();
return NoAA::pointsToConstantMemory(Loc);
return AliasAnalysis::pointsToConstantMemory(Loc);
}
/// getModRefBehavior - Return the behavior when calling the given call site.
@@ -611,7 +619,7 @@ BasicAliasAnalysis::getModRefBehavior(const Function *F) {
if (unsigned id = F->getIntrinsicID())
return getIntrinsicModRefBehavior(id);
return NoAA::getModRefBehavior(F);
return AliasAnalysis::getModRefBehavior(F);
}
/// getModRefInfo - Check to see if the specified callsite can clobber the
@@ -1065,24 +1073,30 @@ BasicAliasAnalysis::aliasCheck(const Value *V1, unsigned V1Size,
std::swap(V1Size, V2Size);
std::swap(O1, O2);
}
if (const GEPOperator *GV1 = dyn_cast<GEPOperator>(V1))
return aliasGEP(GV1, V1Size, V2, V2Size, O1, O2);
if (const GEPOperator *GV1 = dyn_cast<GEPOperator>(V1)) {
AliasResult Result = aliasGEP(GV1, V1Size, V2, V2Size, O1, O2);
if (Result != MayAlias) return Result;
}
if (isa<PHINode>(V2) && !isa<PHINode>(V1)) {
std::swap(V1, V2);
std::swap(V1Size, V2Size);
}
if (const PHINode *PN = dyn_cast<PHINode>(V1))
return aliasPHI(PN, V1Size, V2, V2Size);
if (const PHINode *PN = dyn_cast<PHINode>(V1)) {
AliasResult Result = aliasPHI(PN, V1Size, V2, V2Size);
if (Result != MayAlias) return Result;
}
if (isa<SelectInst>(V2) && !isa<SelectInst>(V1)) {
std::swap(V1, V2);
std::swap(V1Size, V2Size);
}
if (const SelectInst *S1 = dyn_cast<SelectInst>(V1))
return aliasSelect(S1, V1Size, V2, V2Size);
if (const SelectInst *S1 = dyn_cast<SelectInst>(V1)) {
AliasResult Result = aliasSelect(S1, V1Size, V2, V2Size);
if (Result != MayAlias) return Result;
}
return NoAA::alias(Location(V1, V1Size), Location(V2, V2Size));
return AliasAnalysis::alias(Location(V1, V1Size), Location(V2, V2Size));
}
// Make sure that anything that uses AliasAnalysis pulls in this file.