================
@@ -1160,23 +1162,10 @@ llvm::Value *CodeGenFunction::EmitLoadOfCountedByField(
if (!StructBase || StructBase->HasSideEffects(getContext()))
return nullptr;
- llvm::Value *Res = nullptr;
- if (const auto *DRE = dyn_cast<DeclRefExpr>(StructBase)) {
- Res = EmitDeclRefLValue(DRE).getPointer(*this);
- Res = Builder.CreateAlignedLoad(ConvertType(DRE->getType()), Res,
- getPointerAlign(), "dre.load");
- } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(StructBase)) {
- LValue LV = EmitMemberExpr(ME);
- Address Addr = LV.getAddress();
- Res = Addr.emitRawPointer(*this);
- } else if (StructBase->getType()->isPointerType()) {
- LValueBaseInfo BaseInfo;
- TBAAAccessInfo TBAAInfo;
- Address Addr = EmitPointerWithAlignment(StructBase, &BaseInfo, &TBAAInfo);
- Res = Addr.emitRawPointer(*this);
- } else {
- return nullptr;
- }
+ LValueBaseInfo BaseInfo;
+ TBAAAccessInfo TBAAInfo;
+ Address Addr = EmitPointerWithAlignment(StructBase, &BaseInfo, &TBAAInfo);
----------------
Cydox wrote:
In the example C file that causes the compiler to segfault, `StructBase` is not
a pointer here, so this fails.
Here's a dump of StructBase:
```
MemberExpr 0x1240b890 'struct variable' lvalue ->growable 0x1240ac20
`-ImplicitCastExpr 0x1240b878 'struct bucket *' <LValueToRValue>
`-DeclRefExpr 0x1240b858 'struct bucket *' lvalue Var 0x1240afe8 'p' 'struct
bucket *'
```
So you have to distinguish between the MemberExpr and the pointer case right
here, at which point you are basically back to my PR (although I guess the case
for `DeclRefExpr` can be removed additionally; that does break tests, so I'll
check carefully it the behavior is still correct with that case removed)
https://github.com/llvm/llvm-project/pull/110487
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