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Fix Regression/Analysis/BasicAA/2005-03-09-BrokenBasicAA.ll, a miscompilation

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that Alkis found with Java, thanks Alkis!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20531 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-03-09 16:29:52 +00:00
parent 465e24ba20
commit 50bc9ef507
1 changed files with 6 additions and 2 deletions
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8
lib/Analysis/BasicAliasAnalysis.cpp
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@ -307,7 +307,9 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
if (!isa<Argument>(O1) && isa<ConstantPointerNull>(V2))
return NoAlias; // Unique values don't alias null
if (isa<GlobalVariable>(O1) || isa<AllocationInst>(O1))
if (isa<GlobalVariable>(O1) ||
(isa<AllocationInst>(O1) &&
!cast<AllocationInst>(O1)->isArrayAllocation()))
if (cast<PointerType>(O1->getType())->getElementType()->isSized()) {
// If the size of the other access is larger than the total size of the
// global/alloca/malloc, it cannot be accessing the global (it's
@ -323,7 +325,9 @@ BasicAliasAnalysis::alias(const Value *V1, unsigned V1Size,
if (!isa<Argument>(O2) && isa<ConstantPointerNull>(V1))
return NoAlias; // Unique values don't alias null
if (isa<GlobalVariable>(O2) || isa<AllocationInst>(O2))
if (isa<GlobalVariable>(O2) ||
(isa<AllocationInst>(O2) &&
!cast<AllocationInst>(O2)->isArrayAllocation()))
if (cast<PointerType>(O2->getType())->getElementType()->isSized()) {
// If the size of the other access is larger than the total size of the
// global/alloca/malloc, it cannot be accessing the object (it's