e0ac46e69d
This reverts commit d618f1c3b12effd0c2bdb7d02108d3551f389d3d. This commit wasn't reviewed ahead of time and significant concerns were raised immediately after it landed. According to our developer policy this warrants immediate revert of the commit. https://llvm.org/docs/DeveloperPolicy.html#patch-reversion-policy Differential Revision: https://reviews.llvm.org/D155509
97 lines
3.5 KiB
C
97 lines
3.5 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: @.str = private unnamed_addr constant [6 x i8] c"v8@?0\00"
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// X64: @__block_literal_global = internal constant {{.*}} { ptr @_NSConcreteGlobalBlock, i32 1342177280,
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// X64: @.str.1 = private unnamed_addr constant [12 x i8] c"i16@?0c8f12\00"
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// X64: store i32 1073741824, ptr
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// X32: [[STR1:@.*]] = private unnamed_addr constant [6 x i8] c"v4@?0\00"
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// X32: @__block_descriptor_tmp = internal constant [[FULL_DESCRIPTOR_T:.*]] { i32 0, i32 20, ptr [[STR1]], ptr null }
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// X32: @__block_literal_global = internal constant [[GLOBAL_LITERAL_T:.*]] { ptr @_NSConcreteGlobalBlock, i32 1342177280, i32 0, ptr @global_block_invoke{{.*}}, ptr @__block_descriptor_tmp }
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// X32: [[STR2:@.*]] = private unnamed_addr constant [11 x i8] c"i12@?0c4f8\00"
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// X32: @__block_descriptor_tmp{{.*}} = internal constant [[FULL_DESCRIPTOR_T]] { i32 0, i32 24, ptr [[STR2]], ptr null }
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// X32: store i32 1073741824, ptr
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// rdar://7635294
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int globalInt;
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void (^global)(void) = ^{ ++globalInt; };
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void foo(int param) {
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extern int rand(void);
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extern void rand_r(int (^b)(char x, float y)); // name a function present at runtime
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while (param--)
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rand_r(^(char x, float y){ return x + (int)y + param + rand(); }); // generate a local block binding param
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}
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#if 0
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#include <stdio.h>
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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_HAS_DESCRIPTOR = (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 NULL;
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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 main(int argc, char *argv[]) {
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printf("desired global flags: %d\n", BLOCK_IS_GLOBAL | BLOCK_HAS_OBJC_TYPE);
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printf("desired stack flags: %d\n", BLOCK_HAS_OBJC_TYPE);
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printf("types for global: %s\n", getBlockSignature(global));
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printf("types for local: %s\n", getBlockSignature(^int(char x, float y) { return (int)(y + x); }));
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return 0;
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}
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/*
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x86_64
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desired global flags: 1342177280
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desired stack flags: 1073741824
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types for global: v8@?0
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types for local: i16@?0c8f12
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i386
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desired global flags: 1342177280
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desired stack flags: 1073741824
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types for global: v4@?0
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types for local: i12@?0c4f8
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*/
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#endif
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