bitfield-layout.cpp
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// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - -O3 | FileCheck -check-prefix CHECK-LP64 %s
// RUN: %clang_cc1 %s -triple=i386-apple-darwin10 -emit-llvm -o - -O3 | FileCheck -check-prefix CHECK-LP32 %s
// CHECK-LP64: %union.Test1 = type { i32, [4 x i8] }
union Test1 {
int a;
int b: 39;
} t1;
// CHECK-LP64: %union.Test2 = type { i8 }
union Test2 {
int : 6;
} t2;
// CHECK-LP64: %union.Test3 = type { i16 }
union Test3 {
int : 9;
} t3;
#define CHECK(x) if (!(x)) return __LINE__
int f() {
struct {
int a;
unsigned long long b : 65;
int c;
} c;
c.a = 0;
c.b = (unsigned long long)-1;
c.c = 0;
CHECK(c.a == 0);
CHECK(c.b == (unsigned long long)-1);
CHECK(c.c == 0);
// CHECK-LP64: ret i32 0
// CHECK-LP32: ret i32 0
return 0;
}