sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
minix/external/bsd/llvm/dist/clang/test/CodeGen/bitfield-2.c
Lionel Sambuc f4a2713ac8 Importing netbsd clang -- pristine 
Change-Id: Ia40e9ffdf29b5dab2f122f673ff6802a58bc690f
2014-07-28 17:05:57 +02:00

344 lines
7.7 KiB
C
Raw Blame History

// RUN: %clang_cc1 -emit-llvm -triple x86_64 -O3 -o %t.opt.ll %s \
// RUN: -fdump-record-layouts > %t.dump.txt
// RUN: FileCheck -check-prefix=CHECK-RECORD < %t.dump.txt %s
// RUN: FileCheck -check-prefix=CHECK-OPT < %t.opt.ll %s
/****/
// Check that we don't read off the end a packed 24-bit structure.
// PR6176
// CHECK-RECORD: *** Dumping IRgen Record Layout
// CHECK-RECORD: Record: RecordDecl{{.*}}s0
// CHECK-RECORD: Layout: <CGRecordLayout
// CHECK-RECORD: LLVMType:%struct.s0 = type <{ [3 x i8] }>
// CHECK-RECORD: IsZeroInitializable:1
// CHECK-RECORD: BitFields:[
// CHECK-RECORD: <CGBitFieldInfo Offset:0 Size:24 IsSigned:1 StorageSize:24 StorageAlignment:1>
struct __attribute((packed)) s0 {
int f0 : 24;
};
struct s0 g0 = { 0xdeadbeef };
int f0_load(struct s0 *a0) {
int size_check[sizeof(struct s0) == 3 ? 1 : -1];
return a0->f0;
}
int f0_store(struct s0 *a0) {
return (a0->f0 = 1);
}
int f0_reload(struct s0 *a0) {
return (a0->f0 += 1);
}
// CHECK-OPT-LABEL: define i64 @test_0()
// CHECK-OPT: ret i64 1
// CHECK-OPT: }
unsigned long long test_0() {
struct s0 g0 = { 0xdeadbeef };
unsigned long long res = 0;
res ^= g0.f0;
res ^= f0_load(&g0) ^ f0_store(&g0) ^ f0_reload(&g0);
res ^= g0.f0;
return res;
}
/****/
// PR5591
// CHECK-RECORD: *** Dumping IRgen Record Layout
// CHECK-RECORD: Record: RecordDecl{{.*}}s1
// CHECK-RECORD: Layout: <CGRecordLayout
// CHECK-RECORD: LLVMType:%struct.s1 = type <{ [3 x i8] }>
// CHECK-RECORD: IsZeroInitializable:1
// CHECK-RECORD: BitFields:[
// CHECK-RECORD: <CGBitFieldInfo Offset:0 Size:10 IsSigned:1 StorageSize:24 StorageAlignment:1>
// CHECK-RECORD: <CGBitFieldInfo Offset:10 Size:10 IsSigned:1 StorageSize:24 StorageAlignment:1>
#pragma pack(push)
#pragma pack(1)
struct __attribute((packed)) s1 {
signed f0 : 10;
signed f1 : 10;
};
#pragma pack(pop)
struct s1 g1 = { 0xdeadbeef, 0xdeadbeef };
int f1_load(struct s1 *a0) {
int size_check[sizeof(struct s1) == 3 ? 1 : -1];
return a0->f1;
}
int f1_store(struct s1 *a0) {
return (a0->f1 = 1234);
}
int f1_reload(struct s1 *a0) {
return (a0->f1 += 1234);
}
// CHECK-OPT-LABEL: define i64 @test_1()
// CHECK-OPT: ret i64 210
// CHECK-OPT: }
unsigned long long test_1() {
struct s1 g1 = { 0xdeadbeef, 0xdeadbeef };
unsigned long long res = 0;
res ^= g1.f0 ^ g1.f1;
res ^= f1_load(&g1) ^ f1_store(&g1) ^ f1_reload(&g1);
res ^= g1.f0 ^ g1.f1;
return res;
}
/****/
// Check that we don't access beyond the bounds of a union.
//
// PR5567
// CHECK-RECORD: *** Dumping IRgen Record Layout
// CHECK-RECORD: Record: RecordDecl{{.*}}u2
// CHECK-RECORD: Layout: <CGRecordLayout
// CHECK-RECORD: LLVMType:%union.u2 = type <{ i8 }>
// CHECK-RECORD: IsZeroInitializable:1
// CHECK-RECORD: BitFields:[
// CHECK-RECORD: <CGBitFieldInfo Offset:0 Size:3 IsSigned:0 StorageSize:8 StorageAlignment:1>
union __attribute__((packed)) u2 {
unsigned long long f0 : 3;
};
union u2 g2 = { 0xdeadbeef };
int f2_load(union u2 *a0) {
return a0->f0;
}
int f2_store(union u2 *a0) {
return (a0->f0 = 1234);
}
int f2_reload(union u2 *a0) {
return (a0->f0 += 1234);
}
// CHECK-OPT-LABEL: define i64 @test_2()
// CHECK-OPT: ret i64 2
// CHECK-OPT: }
unsigned long long test_2() {
union u2 g2 = { 0xdeadbeef };
unsigned long long res = 0;
res ^= g2.f0;
res ^= f2_load(&g2) ^ f2_store(&g2) ^ f2_reload(&g2);
res ^= g2.f0;
return res;
}
/***/
// PR5039
struct s3 {
long long f0 : 32;
long long f1 : 32;
};
struct s3 g3 = { 0xdeadbeef, 0xdeadbeef };
int f3_load(struct s3 *a0) {
a0->f0 = 1;
return a0->f0;
}
int f3_store(struct s3 *a0) {
a0->f0 = 1;
return (a0->f0 = 1234);
}
int f3_reload(struct s3 *a0) {
a0->f0 = 1;
return (a0->f0 += 1234);
}
// CHECK-OPT-LABEL: define i64 @test_3()
// CHECK-OPT: ret i64 -559039940
// CHECK-OPT: }
unsigned long long test_3() {
struct s3 g3 = { 0xdeadbeef, 0xdeadbeef };
unsigned long long res = 0;
res ^= g3.f0 ^ g3.f1;
res ^= f3_load(&g3) ^ f3_store(&g3) ^ f3_reload(&g3);
res ^= g3.f0 ^ g3.f1;
return res;
}
/***/
// This is a case where the bitfield access will straddle an alignment boundary
// of its underlying type.
struct s4 {
unsigned f0 : 16;
unsigned f1 : 28 __attribute__ ((packed));
};
struct s4 g4 = { 0xdeadbeef, 0xdeadbeef };
int f4_load(struct s4 *a0) {
return a0->f0 ^ a0->f1;
}
int f4_store(struct s4 *a0) {
return (a0->f0 = 1234) ^ (a0->f1 = 5678);
}
int f4_reload(struct s4 *a0) {
return (a0->f0 += 1234) ^ (a0->f1 += 5678);
}
// CHECK-OPT-LABEL: define i64 @test_4()
// CHECK-OPT: ret i64 4860
// CHECK-OPT: }
unsigned long long test_4() {
struct s4 g4 = { 0xdeadbeef, 0xdeadbeef };
unsigned long long res = 0;
res ^= g4.f0 ^ g4.f1;
res ^= f4_load(&g4) ^ f4_store(&g4) ^ f4_reload(&g4);
res ^= g4.f0 ^ g4.f1;
return res;
}
/***/
struct s5 {
unsigned f0 : 2;
_Bool f1 : 1;
_Bool f2 : 1;
};
struct s5 g5 = { 0xdeadbeef, 0xdeadbeef };
int f5_load(struct s5 *a0) {
return a0->f0 ^ a0->f1;
}
int f5_store(struct s5 *a0) {
return (a0->f0 = 0xF) ^ (a0->f1 = 0xF) ^ (a0->f2 = 0xF);
}
int f5_reload(struct s5 *a0) {
return (a0->f0 += 0xF) ^ (a0->f1 += 0xF) ^ (a0->f2 += 0xF);
}
// CHECK-OPT-LABEL: define i64 @test_5()
// CHECK-OPT: ret i64 2
// CHECK-OPT: }
unsigned long long test_5() {
struct s5 g5 = { 0xdeadbeef, 0xdeadbeef, 0xdeadbeef };
unsigned long long res = 0;
res ^= g5.f0 ^ g5.f1 ^ g5.f2;
res ^= f5_load(&g5) ^ f5_store(&g5) ^ f5_reload(&g5);
res ^= g5.f0 ^ g5.f1 ^ g5.f2;
return res;
}
/***/
struct s6 {
_Bool f0 : 2;
};
struct s6 g6 = { 0xF };
int f6_load(struct s6 *a0) {
return a0->f0;
}
int f6_store(struct s6 *a0) {
return a0->f0 = 0x0;
}
int f6_reload(struct s6 *a0) {
return (a0->f0 += 0xF);
}
// CHECK-OPT-LABEL: define zeroext i1 @test_6()
// CHECK-OPT: ret i1 true
// CHECK-OPT: }
_Bool test_6() {
struct s6 g6 = { 0xF };
unsigned long long res = 0;
res ^= g6.f0;
res ^= f6_load(&g6);
res ^= g6.f0;
return res;
}
/***/
// Check that we compute the best alignment possible for each access.
//
// CHECK-RECORD: *** Dumping IRgen Record Layout
// CHECK-RECORD: Record: RecordDecl{{.*}}s7
// CHECK-RECORD: Layout: <CGRecordLayout
// CHECK-RECORD: LLVMType:%struct.s7 = type { i32, i32, i32, i8, [3 x i8], [4 x i8], [12 x i8] }
// CHECK-RECORD: IsZeroInitializable:1
// CHECK-RECORD: BitFields:[
// CHECK-RECORD: <CGBitFieldInfo Offset:0 Size:5 IsSigned:1 StorageSize:8 StorageAlignment:4>
// CHECK-RECORD: <CGBitFieldInfo Offset:0 Size:29 IsSigned:1 StorageSize:32 StorageAlignment:16>
struct __attribute__((aligned(16))) s7 {
int a, b, c;
int f0 : 5;
int f1 : 29;
};
int f7_load(struct s7 *a0) {
return a0->f0;
}
/***/
// This is a case where we narrow the access width immediately.
struct __attribute__((packed)) s8 {
char f0 : 4;
char f1;
int f2 : 4;
char f3 : 4;
};
struct s8 g8 = { 0xF };
int f8_load(struct s8 *a0) {
return a0->f0 ^ a0 ->f2 ^ a0->f3;
}
int f8_store(struct s8 *a0) {
return (a0->f0 = 0xFD) ^ (a0->f2 = 0xFD) ^ (a0->f3 = 0xFD);
}
int f8_reload(struct s8 *a0) {
return (a0->f0 += 0xFD) ^ (a0->f2 += 0xFD) ^ (a0->f3 += 0xFD);
}
// CHECK-OPT-LABEL: define i32 @test_8()
// CHECK-OPT: ret i32 -3
// CHECK-OPT: }
unsigned test_8() {
struct s8 g8 = { 0xdeadbeef, 0xdeadbeef, 0xdeadbeef, 0xdeadbeef };
unsigned long long res = 0;
res ^= g8.f0 ^ g8.f2 ^ g8.f3;
res ^= f8_load(&g8) ^ f8_store(&g8) ^ f8_reload(&g8);
res ^= g8.f0 ^ g8.f2 ^ g8.f3;
return res;
}
/***/
// This is another case where we narrow the access width immediately.
//
// <rdar://problem/7893760>
struct __attribute__((packed)) s9 {
unsigned f0 : 7;
unsigned f1 : 7;
unsigned f2 : 7;
unsigned f3 : 7;
unsigned f4 : 7;
unsigned f5 : 7;
unsigned f6 : 7;
unsigned f7 : 7;
};
int f9_load(struct s9 *a0) {
return a0->f7;
}
Reference in a new issue View git blame Copy permalink