yaxunl marked an inline comment as done.
yaxunl added inline comments.
================
Comment at: lib/CodeGen/CGCall.cpp:3861
< Align.getQuantity()) ||
(ArgInfo.getIndirectByVal() && (RVAddrSpace != ArgAddrSpace))) {
// Create an aligned temporary, and copy to it.
----------------
rjmccall wrote:
> This should be comparing AST address spaces.
The AST address space of RV cannot be obtained through
`CGFunctionInfo::const_arg_iterator it` and `it->type` since `it->type` takes
type of
```
ImplicitCastExpr 0x60a9ff0 <col:5> 'struct S':'struct S' <LValueToRValue>
`-DeclRefExpr 0x60a9f28 <col:5> '__global struct S':'__global struct S'
lvalue Var 0x607efb0
```
and the original addr space is lost due to LValueToRValue cast.
To get the AST addr space of RV, it seems I need to save the argument Expr in
CallArgList and get it from Expr.
https://reviews.llvm.org/D34367
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