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| author | Alex Lorenz <arphaman@gmail.com> | 2018-01-31 21:59:02 +0000 |
|---|---|---|
| committer | Alex Lorenz <arphaman@gmail.com> | 2018-01-31 21:59:02 +0000 |
| commit | de07acb9a53066cb9c2a3e4bc4edd7be06db17d1 (patch) | |
| tree | 8757b8eb6c7648c12fe2234022062aba529f8c36 /clang/test/CodeGen/mms-bitfields.c | |
| parent | a75677c2b7d63475d235b684e4bd52955439892e (diff) | |
| download | bcm5719-llvm-de07acb9a53066cb9c2a3e4bc4edd7be06db17d1.tar.gz bcm5719-llvm-de07acb9a53066cb9c2a3e4bc4edd7be06db17d1.zip | |
[PR32482] Fix bitfield layout for -mms-bitfield and pragma pack
The patch ensures that a new storage unit is created when the new bitfield's
size is wider than the available bits.
rdar://36343145
Differential Revision: https://reviews.llvm.org/D42660
llvm-svn: 323921
Diffstat (limited to 'clang/test/CodeGen/mms-bitfields.c')
| -rw-r--r-- | clang/test/CodeGen/mms-bitfields.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/clang/test/CodeGen/mms-bitfields.c b/clang/test/CodeGen/mms-bitfields.c index 1617e8ac40d..d4604fbaa44 100644 --- a/clang/test/CodeGen/mms-bitfields.c +++ b/clang/test/CodeGen/mms-bitfields.c @@ -20,3 +20,46 @@ struct s3 { } s3; // CHECK: %struct.s3 = type { i32, [4 x i8], %struct.s1 } + +// PR32482: + +#pragma pack (push,1) + +typedef unsigned int UINT32; + +struct Inner { + UINT32 A : 1; + UINT32 B : 1; + UINT32 C : 1; + UINT32 D : 30; +} Inner; + +#pragma pack (pop) + +// CHECK: %struct.Inner = type { i32, i32 } + +// CHECK: %struct.A = type { i32, i32, i32 } + +#pragma pack(push, 1) + +union HEADER { + struct A { + int : 3; // Bits 2:0 + int a : 9; // Bits 11:3 + int : 12; // Bits 23:12 + int b : 17; // Bits 40:24 + int : 7; // Bits 47:41 + int c : 4; // Bits 51:48 + int : 4; // Bits 55:52 + int d : 3; // Bits 58:56 + int : 5; // Bits 63:59 + } Bits; +} HEADER; + +#pragma pack(pop) + +struct Inner variable = { 1,0,1, 21 }; +union HEADER hdr = {{1,2,3,4}}; + +// CHECK: @variable = global { i8, [3 x i8], i8, i8, i8, i8 } { i8 5, [3 x i8] undef, i8 21, i8 0, i8 0, i8 0 }, align 1 +// CHECK: @hdr = global { { i8, i8, [2 x i8], i8, i8, i8, i8, i8, [3 x i8] } } { { i8, i8, [2 x i8], i8, i8, i8, i8, i8, [3 x i8] } { i8 8, i8 0, [2 x i8] undef, i8 2, i8 0, i8 0, i8 3, i8 4, [3 x i8] undef } }, align 1 |
