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Global Aliases are not identifiable objects. 

llvm-svn: 80263
This commit is contained in:
Dan Gohman 2009-08-27 17:52:56 +00:00
parent 05f11351ab
commit 1f59f0146f
2 changed files with 5 additions and 3 deletions
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2
llvm/include/llvm/Analysis/AliasAnalysis.h
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@ -347,7 +347,7 @@ bool isNoAliasCall(const Value *V);
/// isIdentifiedObject - Return true if this pointer refers to a distinct and
/// identifiable object. This returns true for:
/// Global Variables and Functions
/// Global Variables and Functions (but not Global Aliases)
/// Allocas and Mallocs
/// ByVal and NoAlias Arguments
/// NoAlias returns

6
llvm/lib/Analysis/AliasAnalysis.cpp
View File

@ -233,13 +233,15 @@ bool llvm::isNoAliasCall(const Value *V) {
/// isIdentifiedObject - Return true if this pointer refers to a distinct and
/// identifiable object. This returns true for:
/// Global Variables and Functions
/// Global Variables and Functions (but not Global Aliases)
/// Allocas and Mallocs
/// ByVal and NoAlias Arguments
/// NoAlias returns
///
bool llvm::isIdentifiedObject(const Value *V) {
if (isa<GlobalValue>(V) || isa<AllocationInst>(V) || isNoAliasCall(V))
if (isa<AllocationInst>(V) || isNoAliasCall(V))
return true;
if (isa<GlobalValue>(V) && !isa<GlobalAlias>(V))
return true;
if (const Argument *A = dyn_cast<Argument>(V))
return A->hasNoAliasAttr() || A->hasByValAttr();