forked from OSchip/llvm-project
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
// RUN: %clang_cc1 -fsyntax-only -verify %s
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typedef union {
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int *ip;
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float *fp;
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long *__restrict rlp;
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void *vpa[1];
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} TU __attribute__((transparent_union));
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void f(TU); // expected-note{{passing argument to parameter here}}
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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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/* Test ability to redeclare a function taking a transparent_union arg
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with various compatible and incompatible argument types. */
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void fip(TU);
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void fip(int *i) {}
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void ffp(TU);
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void ffp(float *f) {}
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void flp(TU);
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void flp(long *l) {}
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void fvp(TU); // expected-note{{previous declaration is here}}
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void fvp(void *p) {} // expected-error{{conflicting types}}
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void fsp(TU); // expected-note{{previous declaration is here}}
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void fsp(short *s) {} // expected-error{{conflicting types}}
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void fi(TU); // expected-note{{previous declaration is here}}
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void fi(int i) {} // expected-error{{conflicting types}}
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void fvpp(TU); // expected-note{{previous declaration is here}}
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void fvpp(void **v) {} // expected-error{{conflicting types}}
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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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typedef int int4 __attribute__((ext_vector_type(4)));
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typedef union {
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int4 vec; // expected-warning{{first field of a transparent union cannot have vector type 'int4'; transparent_union attribute ignored}}
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} TU5 __attribute__((transparent_union));
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union pr15134 {
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unsigned int u;
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struct {
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unsigned int expo:2;
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unsigned int mant:30;
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} __attribute__((packed));
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// The packed attribute is acceptable because it defines a less strict
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// alignment than required by the first field of the transparent union.
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} __attribute__((transparent_union));
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union pr15134v2 {
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struct { // expected-note {{alignment of first field is 32 bits}}
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unsigned int u1;
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unsigned int u2;
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};
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struct { // expected-warning {{alignment of field '' (64 bits) does not match the alignment of the first field in transparent union; transparent_union attribute ignored}}
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unsigned int u3;
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} __attribute__((aligned(8)));
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} __attribute__((transparent_union));
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