106 lines
3.3 KiB
C
106 lines
3.3 KiB
C
// RUN: %clang_cc1 -fblocks -triple x86_64-apple-darwin9 %s -emit-llvm -o - | FileCheck %s -check-prefix=X64
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// RUN: %clang_cc1 -fblocks -triple i686-apple-darwin9 %s -emit-llvm -o - | FileCheck %s -check-prefix=X32
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// X64: internal constant {{.*}} { i8** @_NSConcreteGlobalBlock, i32 1879048192
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// X64: store i32 1610612736, i32* %want
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// X32: @_NSConcreteGlobalBlock, i32 1879048192, i32 0,
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// X32: store i32 1610612736, i32* %want
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// rdar://7677537
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int printf(const char *, ...);
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void *malloc(__SIZE_TYPE__ size);
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typedef struct bigbig {
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int array[512];
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char more[32];
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} BigStruct_t;
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BigStruct_t (^global)(void) = ^{ return *(BigStruct_t *)malloc(sizeof(struct bigbig)); };
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const char * getBlockSignature(void *);
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BigStruct_t foo(int param) {
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BigStruct_t x;
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BigStruct_t (^f)(int) = ^(int param) {
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BigStruct_t *result = malloc(sizeof(BigStruct_t));
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result->array[23] = param;
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return *result;
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};
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getBlockSignature(f);
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return x;
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}
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enum {
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BLOCK_HAS_COPY_DISPOSE = (1 << 25),
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BLOCK_HAS_CXX_OBJ = (1 << 26),
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BLOCK_IS_GLOBAL = (1 << 28),
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BLOCK_USE_STRET = (1 << 29),
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BLOCK_HAS_OBJC_TYPE = (1 << 30)
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};
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struct block_descriptor_big {
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unsigned long int reserved;
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unsigned long int size;
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void (*copy)(void *dst, void *src); // conditional on BLOCK_HAS_COPY_DISPOSE
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void (*dispose)(void *); // conditional on BLOCK_HAS_COPY_DISPOSE
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const char *signature; // conditional on BLOCK_HAS_OBJC
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const char *layout; // conditional on BLOCK_HAS_OBJC
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};
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struct block_descriptor_small {
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unsigned long int reserved;
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unsigned long int size;
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const char *signature; // conditional on BLOCK_HAS_OBJC
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const char *layout; // conditional on BLOCK_HAS_OBJC
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};
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struct block_layout_abi { // can't change
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void *isa;
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int flags;
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int reserved;
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void (*invoke)(void *, ...);
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struct block_descriptor_big *descriptor;
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};
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const char *getBlockSignature(void *block) {
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struct block_layout_abi *layout = (struct block_layout_abi *)block;
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if ((layout->flags & BLOCK_HAS_OBJC_TYPE) != BLOCK_HAS_OBJC_TYPE) return 0;
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if (layout->flags & BLOCK_HAS_COPY_DISPOSE)
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return layout->descriptor->signature;
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else
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return ((struct block_descriptor_small *)layout->descriptor)->signature;
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}
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int usesStruct(void *block) {
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struct block_layout_abi *layout = (struct block_layout_abi *)block;
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int want = BLOCK_HAS_OBJC_TYPE | BLOCK_USE_STRET;
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return (layout->flags & want) == want;
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}
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int main(int argc, char *argv[]) {
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printf("desired global flags: %d\n", BLOCK_USE_STRET | BLOCK_IS_GLOBAL | BLOCK_HAS_OBJC_TYPE);
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printf("desired stack flags: %d\n", BLOCK_USE_STRET | BLOCK_HAS_OBJC_TYPE);
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printf("should be non-zero: %d\n", usesStruct(global));
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BigStruct_t x;
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BigStruct_t (^local)(int) = ^(int param) {
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BigStruct_t *result = (BigStruct_t *)malloc(sizeof(BigStruct_t));
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result->array[23] = argc;
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return *result;
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};
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printf("should be non-zero: %d\n", usesStruct(global));
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printf("should be non-zero: %d\n", usesStruct(local));
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printf("should be zero: %d\n", usesStruct(^void(int x){ }));
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return 0;
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}
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/*
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desired global flags: 1879048192
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desired stack flags: 1610612736
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should be non-zero: 1
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should be non-zero: 1
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should be non-zero: 1
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should be zero: 0
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*/
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