forked from OSchip/llvm-project
b88d2474df
Summary:
When the code is compiled for arm32 and the builtin `__va_list` declaration is created by `CreateAAPCSABIBuiltinVaListDecl`, the declaration is not saved in the `ASTContext` which may lead to a compilation error or crash.
Minimal reproducer I was able to find:
**header.h**
```
#include <stdarg.h>
typedef va_list va_list_1;
```
**test.cpp**
```
typedef __builtin_va_list va_list_2;
void foo(const char* format, ...) { va_list args; va_start( args, format ); }
```
Steps to reproduce:
```
clang -x c++-header --target=armv7l-linux-eabihf header.h
clang -c -include header.h --target=armv7l-linux-eabihf test.cpp
```
Compilation error:
```
error: non-const lvalue reference to type '__builtin_va_list'
cannot bind to a value of unrelated type 'va_list' (aka '__builtin_va_list')
```
Compiling the same code as a C source leads to a crash:
```
clang --target=armv7l-linux-eabihf header.h
clang -c -x c -include header.h --target=armv7l-linux-eabihf test.cpp
```
Reviewers: logan, rsmith
Subscribers: cfe-commits, asl, aemerson, rengolin
Differential Revision: http://reviews.llvm.org/D18557
llvm-svn: 264930
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|---|---|---|
| .. | ||
| badpch-dir.h.gch | ||
| modules | ||
| __va_list_tag-typedef.h | ||
| __va_list_tag.h | ||
| arc.h | ||
| badpch-empty.h.gch | ||
| case-insensitive-include.h | ||
| chain-decls1.h | ||
| chain-decls2.h | ||
| chain-ext_vector1.h | ||
| chain-ext_vector2.h | ||
| chain-external-defs1.h | ||
| chain-external-defs2.h | ||
| chain-macro-override1.h | ||
| chain-macro-override2.h | ||
| chain-macro1.h | ||
| chain-macro2.h | ||
| chain-remap-types1.h | ||
| chain-remap-types2.h | ||
| chain-selectors1.h | ||
| chain-selectors2.h | ||
| chain-trivial1.h | ||
| chain-trivial2.h | ||
| cuda.h | ||
| cxx-method.h | ||
| cxx11-statement-attributes.h | ||
| namespaces.h | ||
| preamble.h | ||
| typo.h | ||
| typo.hpp | ||
| va_arg.h | ||
| working-directory-1.h | ||