mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 19:29:31 +00:00
Fix a couple of minor problems. Because PHI nodes can use themselves, this
could cause infinite loops. Also, getUnderlyingObject can return null git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12351 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
841714214e
commit
7a82ba0510
@ -159,9 +159,6 @@ static bool AddressMightEscape(const Value *V) {
|
||||
return true;
|
||||
if (AddressMightEscape(I)) return true;
|
||||
break;
|
||||
case Instruction::PHI:
|
||||
if (AddressMightEscape(I)) return true;
|
||||
break;
|
||||
default:
|
||||
return true;
|
||||
}
|
||||
@ -178,7 +175,7 @@ AliasAnalysis::ModRefResult
|
||||
BasicAliasAnalysis::getModRefInfo(CallSite CS, Value *P, unsigned Size) {
|
||||
if (!isa<Constant>(P) && !isa<GlobalValue>(P))
|
||||
if (const AllocationInst *AI =
|
||||
dyn_cast<AllocationInst>(getUnderlyingObject(P))) {
|
||||
dyn_cast_or_null<AllocationInst>(getUnderlyingObject(P))) {
|
||||
// Okay, the pointer is to a stack allocated object. If we can prove that
|
||||
// the pointer never "escapes", then we know the call cannot clobber it,
|
||||
// because it simply can't get its address.
|
||||
|
Loading…
Reference in New Issue
Block a user