File: flexible-array-init.cpp

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (24 lines) | stat: -rw-r--r-- 718 bytes parent folder | download | duplicates (7) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
// RUN: %clang_cc1 -triple i386-unknown-unknown -x c++ -emit-llvm -o - %s | FileCheck %s

union _u { char a[]; } u = {};
union _u0 { char a[]; } u0 = {0};

// CHECK: %union._u = type { [0 x i8] }

// CHECK: @u = global %union._u zeroinitializer, align 1
// CHECK: @u0 = global { [1 x i8] } zeroinitializer, align 1

union { char a[]; } z = {};
// CHECK: @z = internal global %union.{{.*}} zeroinitializer, align 1
union { char a[]; } z0 = {0};
// CHECK: @z0 = internal global { [1 x i8] } zeroinitializer, align 1

/* C++ requires global anonymous unions have static storage, so we have to
   reference them to keep them in the IR output. */
char keep(int pick)
{
	if (pick)
		return z.a[0];
	else
		return z0.a[0];
}