From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/test/Sema/bitfield-layout.c | 42 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 clang/test/Sema/bitfield-layout.c (limited to 'clang/test/Sema/bitfield-layout.c') diff --git a/clang/test/Sema/bitfield-layout.c b/clang/test/Sema/bitfield-layout.c new file mode 100644 index 0000000..2655fc7 --- /dev/null +++ b/clang/test/Sema/bitfield-layout.c @@ -0,0 +1,42 @@ +// RUN: %clang_cc1 %s -fsyntax-only -verify -triple=i686-apple-darwin9 + +#define CHECK_SIZE(kind, name, size) extern int name##1[sizeof(kind name) == size ? 1 : -1]; +#define CHECK_ALIGN(kind, name, size) extern int name##2[__alignof(kind name) == size ? 1 : -1]; + +// Zero-width bit-fields +struct a {char x; int : 0; char y;}; +CHECK_SIZE(struct, a, 5) +CHECK_ALIGN(struct, a, 1) + +union b {char x; int : 0; char y;}; +CHECK_SIZE(union, b, 1) +CHECK_ALIGN(union, b, 1) + +// Unnamed bit-field align +struct c {char x; int : 20;}; +CHECK_SIZE(struct, c, 4) +CHECK_ALIGN(struct, c, 1) + +union d {char x; int : 20;}; +CHECK_SIZE(union, d, 3) +CHECK_ALIGN(union, d, 1) + +// Bit-field packing +struct __attribute__((packed)) e {int x : 4, y : 30, z : 30;}; +CHECK_SIZE(struct, e, 8) +CHECK_ALIGN(struct, e, 1) + +// Alignment on bit-fields +struct f {__attribute((aligned(8))) int x : 30, y : 30, z : 30;}; +CHECK_SIZE(struct, f, 24) +CHECK_ALIGN(struct, f, 8) + +// Large structure (overflows i32, in bits). +struct s0 { + char a[0x32100000]; + int x:30, y:30; +}; + +CHECK_SIZE(struct, s0, 0x32100008) +CHECK_ALIGN(struct, s0, 4) + -- cgit v1.2.3