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f75b73549d
- Fix diagnoses when the argument to `alignas` or `_Alignas` is an incomplete type.
Before:
```
./alignas.cpp:1:15: error: invalid application of 'alignof' to an incomplete type 'void'
class alignas(void) Foo {};
~^~~~~
1 error generated.
```
Now:
```
./alignas.cpp:1:15: error: invalid application of 'alignas' to an incomplete type 'void'
class alignas(void) Foo {};
~^~~~~
1 error generated.
```
- Improve the AST fidelity of `alignas` and `_Alignas` attribute.
Before:
```
AlignedAttr 0x13f07f278 <col:7> alignas
`-ConstantExpr 0x13f07f258 <col:15, col:21> 'unsigned long'
|-value: Int 8
`-UnaryExprOrTypeTraitExpr 0x13f07f118 <col:15, col:21> 'unsigned long' alignof 'void *'
```
Now:
```
AlignedAttr 0x14288c608 <col:7> alignas 'void *'
```
Reviewed By: erichkeane
Differential Revision: https://reviews.llvm.org/D150528
16 lines
939 B
C
16 lines
939 B
C
// RUN: %clang_cc1 -triple powerpc64-unknown-aix -target-feature +altivec -target-cpu pwr7 -verify -fsyntax-only %s
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// RUN: %clang_cc1 -triple powerpc-unknown-aix -target-feature +altivec -target-cpu pwr7 -verify -fsyntax-only %s
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int escape(vector int*);
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typedef vector int __attribute__((aligned(8))) UnderAlignedVI;
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UnderAlignedVI TypedefedGlobal;
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vector int V __attribute__((aligned(8))); // expected-warning {{requested alignment is less than minimum alignment of 16 for type '__vector int' (vector of 4 'int' values)}}
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vector int V __attribute__((aligned(8))); // expected-warning {{requested alignment is less than minimum alignment of 16 for type '__vector int' (vector of 4 'int' values)}}
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int localTypedefed(void) {
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UnderAlignedVI TypedefedLocal;
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return escape(&TypedefedLocal); // expected-warning {{passing 8-byte aligned argument to 16-byte aligned parameter 1 of 'escape' may result in an unaligned pointer access}}
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}
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