1 // RUN: %clang_cc1 -fblocks -triple x86_64-apple-darwin9 %s -emit-llvm -o - | FileCheck %s -check-prefix=X64 2 // RUN: %clang_cc1 -fblocks -triple i686-apple-darwin9 %s -emit-llvm -o - | FileCheck %s -check-prefix=X32 3 4 // X64: @.str = private unnamed_addr constant [6 x i8] c"v8@?0\00" 5 // X64: @__block_literal_global = internal constant {{.*}} { i8** @_NSConcreteGlobalBlock, i32 1342177280, 6 // X64: @.str.1 = private unnamed_addr constant [12 x i8] c"i16@?0c8f12\00" 7 // X64: store i32 1073741824, i32* 8 9 // X32: [[STR1:@.*]] = private unnamed_addr constant [6 x i8] c"v4@?0\00" 10 // X32: @__block_descriptor_tmp = internal constant [[FULL_DESCRIPTOR_T:.*]] { i32 0, i32 20, i8* getelementptr inbounds ([6 x i8], [6 x i8]* [[STR1]], i32 0, i32 0), i8* null } 11 // X32: @__block_literal_global = internal constant [[GLOBAL_LITERAL_T:.*]] { i8** @_NSConcreteGlobalBlock, i32 1342177280, i32 0, i8* bitcast (void (i8*)* @global_block_invoke{{.*}} to i8*), [[DESCRIPTOR_T:%.*]]* bitcast ([[FULL_DESCRIPTOR_T]]* @__block_descriptor_tmp to {{%.*}}*) } 12 // X32: [[STR2:@.*]] = private unnamed_addr constant [11 x i8] c"i12@?0c4f8\00" 13 // X32: @__block_descriptor_tmp{{.*}} = internal constant [[FULL_DESCRIPTOR_T]] { i32 0, i32 24, i8* getelementptr inbounds ([11 x i8], [11 x i8]* [[STR2]], i32 0, i32 0), i8* null } 14 // X32: store i32 1073741824, i32* 15 16 // rdar://7635294 17 18 19 int globalInt; 20 void (^global)(void) = ^{ ++globalInt; }; 21 22 23 void foo(int param) { 24 extern int rand(void); 25 extern void rand_r(int (^b)(char x, float y)); // name a function present at runtime 26 while (param--) 27 rand_r(^(char x, float y){ return x + (int)y + param + rand(); }); // generate a local block binding param 28 } 29 30 #if 0 31 #include <stdio.h> 32 enum { 33 BLOCK_HAS_COPY_DISPOSE = (1 << 25), 34 BLOCK_HAS_CXX_OBJ = (1 << 26), 35 BLOCK_IS_GLOBAL = (1 << 28), 36 BLOCK_HAS_DESCRIPTOR = (1 << 29), 37 BLOCK_HAS_OBJC_TYPE = (1 << 30) 38 }; 39 40 struct block_descriptor_big { 41 unsigned long int reserved; 42 unsigned long int size; 43 void (*copy)(void *dst, void *src); // conditional on BLOCK_HAS_COPY_DISPOSE 44 void (*dispose)(void *); // conditional on BLOCK_HAS_COPY_DISPOSE 45 const char *signature; // conditional on BLOCK_HAS_OBJC 46 const char *layout; // conditional on BLOCK_HAS_OBJC 47 }; 48 struct block_descriptor_small { 49 unsigned long int reserved; 50 unsigned long int size; 51 const char *signature; // conditional on BLOCK_HAS_OBJC 52 const char *layout; // conditional on BLOCK_HAS_OBJC 53 }; 54 55 struct block_layout_abi { // can't change 56 void *isa; 57 int flags; 58 int reserved; 59 void (*invoke)(void *, ...); 60 struct block_descriptor_big *descriptor; 61 }; 62 63 const char *getBlockSignature(void *block) { 64 struct block_layout_abi *layout = (struct block_layout_abi *)block; 65 if ((layout->flags & BLOCK_HAS_OBJC_TYPE) != BLOCK_HAS_OBJC_TYPE) return NULL; 66 if (layout->flags & BLOCK_HAS_COPY_DISPOSE) 67 return layout->descriptor->signature; 68 else 69 return ((struct block_descriptor_small *)layout->descriptor)->signature; 70 } 71 72 73 74 int main(int argc, char *argv[]) { 75 printf("desired global flags: %d\n", BLOCK_IS_GLOBAL | BLOCK_HAS_OBJC_TYPE); 76 printf("desired stack flags: %d\n", BLOCK_HAS_OBJC_TYPE); 77 78 printf("types for global: %s\n", getBlockSignature(global)); 79 printf("types for local: %s\n", getBlockSignature(^int(char x, float y) { return (int)(y + x); })); 80 return 0; 81 } 82 83 /* 84 x86_64 85 desired global flags: 1342177280 86 desired stack flags: 1073741824 87 types for global: v8@?0 88 types for local: i16@?0c8f12 89 90 i386 91 desired global flags: 1342177280 92 desired stack flags: 1073741824 93 types for global: v4@?0 94 types for local: i12@?0c4f8 95 */ 96 #endif 97
