diff options
Diffstat (limited to 'clang/test/CodeGen/2009-02-13-zerosize-union-field.c')
| -rw-r--r-- | clang/test/CodeGen/2009-02-13-zerosize-union-field.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/clang/test/CodeGen/2009-02-13-zerosize-union-field.c b/clang/test/CodeGen/2009-02-13-zerosize-union-field.c new file mode 100644 index 0000000..b39a231 --- /dev/null +++ b/clang/test/CodeGen/2009-02-13-zerosize-union-field.c @@ -0,0 +1,16 @@ +// RUN: %clang_cc1 %s -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]* @.str, i32 0, i32 0), i32 0 + printf("%ld\n", sizeof(a)); + // CHECK: getelementptr inbounds ([5 x i8]* @.str, i32 0, i32 0), i32 1 + printf("%ld\n", __alignof__(a)); + // CHECK: getelementptr inbounds ([5 x i8]* @.str, i32 0, i32 0), i32 4 + printf("%ld\n", sizeof(b)); + // CHECK: getelementptr inbounds ([5 x i8]* @.str, i32 0, i32 0), i32 4 + printf("%ld\n", __alignof__(b)); +} |