Get the type's definition in CompInfo::from_ty #3277
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In llvm/llvm-project#147835, Clang's AST changed so that a TagType's decl will not necessarily refer to the type's definition, but to the exact declaration which produced the type. For example, in typedef struct S T; struct S { int x; }; the 'struct S' type would refer to the incomplete type decl in the typedef, causing CompInfo to fail to see the type's definition. This patch inserts a call to use the definition when available. It fixes the original test case in rust-lang#3275 and most of the test failures caused by the Clang change but not all.
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r? @emilio Please take a look! |
emilio
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Thanks a lot for the fix! Included with the squash in #3278 |
emilio
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Nice! Thanks for jumping on this :-) |
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In llvm/llvm-project#147835, Clang's AST changed so that a TagType's decl will not necessarily refer to the type's definition, but to the exact declaration which produced the type.
For example, in
typedef struct S T;
struct S {
int x;
};
the 'struct S' type would refer to the incomplete type decl in the typedef, causing CompInfo to fail to see the type's definition.
This patch inserts a call to use the definition when available. It fixes the original test case in
#3275 and most of the test failures caused by the Clang change but not all.