File: 2009-02-13-zerosize-union-field.c

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-16
  • links: PTS, VCS
  • area: main
  • in suites: sid
  • size: 1,496,368 kB
  • sloc: cpp: 5,593,980; ansic: 986,873; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,547; xml: 953; cs: 573; fortran: 567
file content (16 lines) | stat: -rw-r--r-- 813 bytes parent folder | download | duplicates (3) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
// RUN: %clang_cc1 %s -disable-noundef-analysis -triple i686-apple-darwin -emit-llvm -o - | FileCheck %s
// Every printf has 'i32 0' for the GEP of the string; no point counting those.
typedef unsigned int Foo __attribute__((aligned(32)));
typedef union{Foo:0;}a;
typedef union{int x; Foo:0;}b;
extern int printf(const char*, ...);
int main() {
  // CHECK: getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i32 0, i32 0), i32 0
  printf("%ld\n", sizeof(a));
  // CHECK: getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i32 0, i32 0), i32 1
  printf("%ld\n", __alignof__(a));
  // CHECK: getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i32 0, i32 0), i32 4
  printf("%ld\n", sizeof(b));
  // CHECK: getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i32 0, i32 0), i32 4
  printf("%ld\n", __alignof__(b));
}