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8392f1cc78
Fix __builtin_assume_aligned incorrect type descriptor
example from @rsmith
struct A { int n; };
struct B { int n; };
struct C : A, B {};
void *f(C *c) {
// Incorrectly returns `c` rather than the address of the B base class.
return __builtin_assume_aligned((B*)c, 8);
}
Differential Revision: https://reviews.llvm.org/D133583
27 lines
917 B
C++
27 lines
917 B
C++
// RUN: %clang_cc1 %s -fsyntax-only -verify
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// RUN: %clang_cc1 %s -fsyntax-only -verify -x c
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// RUN: %clang_cc1 %s -fsyntax-only -verify -fms-compatibility
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typedef __typeof__(sizeof(0)) size_t;
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// Redeclaring library builtins is OK.
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void exit(int);
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// expected-error@+2 {{cannot redeclare builtin function '__builtin_va_copy'}}
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// expected-note@+1 {{'__builtin_va_copy' is a builtin with type}}
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void __builtin_va_copy(double d);
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// expected-error@+2 {{cannot redeclare builtin function '__builtin_va_end'}}
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// expected-note@+1 {{'__builtin_va_end' is a builtin with type}}
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void __builtin_va_end(__builtin_va_list);
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// RUN: %clang_cc1 %s -fsyntax-only -verify
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// RUN: %clang_cc1 %s -fsyntax-only -verify -x c
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void __va_start(__builtin_va_list*, ...);
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#ifdef __cplusplus
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void *__builtin_assume_aligned(const void *, size_t, ...) noexcept;
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#else
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void *__builtin_assume_aligned(const void *, size_t, ...);
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#endif
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