forked from OSchip/llvm-project
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
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// RUN: clang -fsyntax-only -Xclang -verify %s
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typedef union {
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int *ip;
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float *fp;
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} TU __attribute__((transparent_union));
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void f(TU);
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void g(int *ip, float *fp, char *cp) {
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f(ip);
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f(fp);
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f(cp); // expected-error{{incompatible type}}
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f(0);
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TU tu_ip = ip; // expected-error{{incompatible type}}
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TU tu;
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tu.ip = ip;
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}
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/* FIXME: we'd like to just use an "int" here and align it differently
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from the normal "int", but if we do so we lose the alignment
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information from the typedef within the compiler. */
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typedef struct { int x, y; } __attribute__((aligned(8))) aligned_struct8;
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typedef struct { int x, y; } __attribute__((aligned(4))) aligned_struct4;
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typedef union {
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aligned_struct4 s4; // expected-note{{alignment of first field}}
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aligned_struct8 s8; // expected-warning{{alignment of field}}
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} TU1 __attribute__((transparent_union));
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typedef union {
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char c; // expected-note{{size of first field is 8 bits}}
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int i; // expected-warning{{size of field}}
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} TU2 __attribute__((transparent_union));
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typedef union {
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float f; // expected-warning{{floating}}
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} TU3 __attribute__((transparent_union));
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typedef union { } TU4 __attribute__((transparent_union)); // expected-warning{{field}}
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