llvm-project

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// RUN: %clang_cc1 -fblocks -fobjc-arc -fobjc-runtime-has-weak -triple i386-apple-darwin -print-ivar-layout -emit-llvm -o /dev/null %s > %t-32.layout
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// RUN: FileCheck --input-file=%t-32.layout %s
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@class NSString;
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extern void NSLog(NSString *format, ...);
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extern int printf(const char *, ...);
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int main(void) {
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  NSString *strong;
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  unsigned long long eightByte = 0x8001800181818181ull;
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  // Test1
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  // CHECK: Inline block variable layout: 0x0100, BL_STRONG:1, BL_OPERATOR:0
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  void (^block1)(void) = ^{ printf("%#llx", eightByte); NSLog(@"%@", strong); };
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  // Test2
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  int i = 1;
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  // CHECK: Inline block variable layout: 0x0100, BL_STRONG:1, BL_OPERATOR:0
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  void (^block2)(void) = ^{ printf("%#llx, %d", eightByte, i); NSLog(@"%@", strong); };
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  //  Test3
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  char ch = 'a';
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  // CHECK: Inline block variable layout: 0x0100, BL_STRONG:1, BL_OPERATOR:0
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  void (^block3)(void) = ^{ printf("%c %#llx", ch, eightByte); NSLog(@"%@", strong); };
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  // Test4
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  unsigned long fourByte = 0x8001ul;
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  // CHECK: Inline block variable layout: 0x0100, BL_STRONG:1, BL_OPERATOR:0
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  void (^block4)(void) = ^{ printf("%c %#lx", ch, fourByte); NSLog(@"%@", strong); };
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  // Test5
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  // Nothing gets printed here since the descriptor of this block is merged with
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  // the descriptor of Test3's block.
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  void (^block5)(void) = ^{ NSLog(@"%@", strong); printf("%c %#llx", ch, eightByte); };
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  // Test6
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  // CHECK: Block variable layout: BL_OPERATOR:0
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  void (^block6)(void) = ^{ printf("%#llx", eightByte); };
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}
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/**
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struct __block_literal_generic { // 32bytes (64bit) and 20 bytes (32bit).
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0  void *__isa;
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4  int __flags;
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8  int __reserved;
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12  void (*__invoke)(void *);
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16  struct __block_descriptor *__descriptor;
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};
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*/
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