1 // RUN: %clang_cc1 %s -cl-std=CL2.0 -include opencl-c.h -triple amdgcn -emit-llvm -o - | FileCheck %s
2 // RUN: %clang_cc1 %s -O0 -cl-std=CL2.0 -include opencl-c.h -triple amdgcn -emit-llvm -o - | FileCheck --check-prefix=NOOPT %s
18 // LLVM requests global variable with common linkage to be initialized with zeroinitializer, therefore use -fno-common
19 // to suppress common linkage for tentative definition.
21 // Test 0 as initializer.
23 // CHECK: @private_p = local_unnamed_addr addrspace(1) global i8* addrspacecast (i8 addrspace(4)* null to i8*), align 4
24 private char *private_p = 0;
26 // CHECK: @local_p = local_unnamed_addr addrspace(1) global i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), align 4
27 local char *local_p = 0;
29 // CHECK: @global_p = local_unnamed_addr addrspace(1) global i8 addrspace(1)* null, align 4
30 global char *global_p = 0;
32 // CHECK: @constant_p = local_unnamed_addr addrspace(1) global i8 addrspace(2)* null, align 4
33 constant char *constant_p = 0;
35 // CHECK: @generic_p = local_unnamed_addr addrspace(1) global i8 addrspace(4)* null, align 4
36 generic char *generic_p = 0;
38 // Test NULL as initializer.
40 // CHECK: @private_p_NULL = local_unnamed_addr addrspace(1) global i8* addrspacecast (i8 addrspace(4)* null to i8*), align 4
41 private char *private_p_NULL = NULL;
43 // CHECK: @local_p_NULL = local_unnamed_addr addrspace(1) global i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), align 4
44 local char *local_p_NULL = NULL;
46 // CHECK: @global_p_NULL = local_unnamed_addr addrspace(1) global i8 addrspace(1)* null, align 4
47 global char *global_p_NULL = NULL;
49 // CHECK: @constant_p_NULL = local_unnamed_addr addrspace(1) global i8 addrspace(2)* null, align 4
50 constant char *constant_p_NULL = NULL;
52 // CHECK: @generic_p_NULL = local_unnamed_addr addrspace(1) global i8 addrspace(4)* null, align 4
53 generic char *generic_p_NULL = NULL;
55 // Test constant folding of null pointer.
56 // A null pointer should be folded to a null pointer in the target address space.
58 // CHECK: @fold_generic = local_unnamed_addr addrspace(1) global i32 addrspace(4)* null, align 4
59 generic int *fold_generic = (global int*)(generic float*)(private char*)0;
61 // CHECK: @fold_priv = local_unnamed_addr addrspace(1) global i16* addrspacecast (i16 addrspace(4)* null to i16*), align 4
62 private short *fold_priv = (private short*)(generic int*)(global void*)0;
64 // CHECK: @fold_priv_arith = local_unnamed_addr addrspace(1) global i8* inttoptr (i32 9 to i8*), align 4
65 private char *fold_priv_arith = (private char*)0 + 10;
67 // CHECK: @fold_int = local_unnamed_addr addrspace(1) global i32 13, align 4
68 int fold_int = (int)(private void*)(generic char*)(global int*)0 + 14;
70 // CHECK: @fold_int2 = local_unnamed_addr addrspace(1) global i32 12, align 4
71 int fold_int2 = (int) ((private void*)0 + 13);
73 // CHECK: @fold_int3 = local_unnamed_addr addrspace(1) global i32 -1, align 4
74 int fold_int3 = (int) ((private int*)0);
76 // CHECK: @fold_int4 = local_unnamed_addr addrspace(1) global i32 7, align 4
77 int fold_int4 = (int) &((private int*)0)[2];
79 // CHECK: @fold_int5 = local_unnamed_addr addrspace(1) global i32 3, align 4
80 int fold_int5 = (int) &((private StructTy1*)0)->p2;
82 // Test static variable initialization.
84 // NOOPT: @test_static_var.sp1 = internal addrspace(1) global i8* addrspacecast (i8 addrspace(4)* null to i8*), align 4
85 // NOOPT: @test_static_var.sp2 = internal addrspace(1) global i8* addrspacecast (i8 addrspace(4)* null to i8*), align 4
86 // NOOPT: @test_static_var.sp3 = internal addrspace(1) global i8* addrspacecast (i8 addrspace(4)* null to i8*), align 4
87 // NOOPT: @test_static_var.sp4 = internal addrspace(1) global i8* null, align 4
88 // NOOPT: @test_static_var.sp5 = internal addrspace(1) global i8* null, align 4
89 // NOOPT: @test_static_var.SS1 = internal addrspace(1) global %struct.StructTy1 { i8* addrspacecast (i8 addrspace(4)* null to i8*), i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(2)* null, i8 addrspace(1)* null, i8 addrspace(4)* null }, align 4
90 // NOOPT: @test_static_var.SS2 = internal addrspace(1) global %struct.StructTy2 zeroinitializer, align 4
92 void test_static_var(void) {
93 static private char *sp1 = 0;
94 static private char *sp2 = NULL;
95 static private char *sp3;
96 static private char *sp4 = (private char*)((void)0, 0);
98 static private char *sp5 = (private char*)x;
100 static StructTy2 SS2;
103 // Test function-scope variable initialization.
104 // NOOPT-LABEL: test_func_scope_var
105 // NOOPT: store i8* addrspacecast (i8 addrspace(4)* null to i8*), i8** %sp1, align 4
106 // NOOPT: store i8* addrspacecast (i8 addrspace(4)* null to i8*), i8** %sp2, align 4
107 // NOOPT: store i8* null, i8** %sp3, align 4
108 // NOOPT: store i8* null, i8** %sp4, align 4
109 // NOOPT: %[[SS1:.*]] = bitcast %struct.StructTy1* %SS1 to i8*
110 // NOOPT: call void @llvm.memcpy.p0i8.p2i8.i64(i8* %[[SS1]], i8 addrspace(2)* bitcast (%struct.StructTy1 addrspace(2)* @test_func_scope_var.SS1 to i8 addrspace(2)*), i64 32, i32 4, i1 false)
111 // NOOPT: %[[SS2:.*]] = bitcast %struct.StructTy2* %SS2 to i8*
112 // NOOPT: call void @llvm.memset.p0i8.i64(i8* %[[SS2]], i8 0, i64 24, i32 4, i1 false)
114 void test_func_scope_var(void) {
115 private char *sp1 = 0;
116 private char *sp2 = NULL;
117 private char *sp3 = (private char*)((void)0, 0);
119 private char *sp4 = (private char*)x;
120 StructTy1 SS1 = {0, 0, 0, 0, 0};
121 StructTy2 SS2 = {0, 0, 0};
124 // Test default initialization of pointers.
126 // Tentative definition of global variables with non-zero initializer
127 // cannot have common linkage since common linkage requires zero initialization
128 // and does not have explicit section.
130 // CHECK: @p1 = weak local_unnamed_addr addrspace(1) global i8* addrspacecast (i8 addrspace(4)* null to i8*), align 4
133 // CHECK: @p2 = weak local_unnamed_addr addrspace(1) global i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), align 4
136 // CHECK: @p3 = common local_unnamed_addr addrspace(1) global i8 addrspace(2)* null, align 4
139 // CHECK: @p4 = common local_unnamed_addr addrspace(1) global i8 addrspace(1)* null, align 4
142 // CHECK: @p5 = common local_unnamed_addr addrspace(1) global i8 addrspace(4)* null, align 4
145 // Test default initialization of sturcture.
147 // CHECK: @S1 = weak local_unnamed_addr addrspace(1) global %struct.StructTy1 { i8* addrspacecast (i8 addrspace(4)* null to i8*), i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(2)* null, i8 addrspace(1)* null, i8 addrspace(4)* null }, align 4
150 // CHECK: @S2 = common local_unnamed_addr addrspace(1) global %struct.StructTy2 zeroinitializer, align 4
153 // Test default initialization of array.
154 // CHECK: @A1 = weak local_unnamed_addr addrspace(1) global [2 x %struct.StructTy1] [%struct.StructTy1 { i8* addrspacecast (i8 addrspace(4)* null to i8*), i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(2)* null, i8 addrspace(1)* null, i8 addrspace(4)* null }, %struct.StructTy1 { i8* addrspacecast (i8 addrspace(4)* null to i8*), i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(2)* null, i8 addrspace(1)* null, i8 addrspace(4)* null }], align 4
157 // CHECK: @A2 = common local_unnamed_addr addrspace(1) global [2 x %struct.StructTy2] zeroinitializer, align 4
160 // Test comparison with 0.
162 // CHECK-LABEL: cmp_private
163 // CHECK: icmp eq i8* %p, addrspacecast (i8 addrspace(4)* null to i8*)
164 void cmp_private(private char* p) {
169 // CHECK-LABEL: cmp_local
170 // CHECK: icmp eq i8 addrspace(3)* %p, addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*)
171 void cmp_local(local char* p) {
176 // CHECK-LABEL: cmp_global
177 // CHECK: icmp eq i8 addrspace(1)* %p, null
178 void cmp_global(global char* p) {
183 // CHECK-LABEL: cmp_constant
184 // CHECK: icmp eq i8 addrspace(2)* %p, null
185 char cmp_constant(constant char* p) {
192 // CHECK-LABEL: cmp_generic
193 // CHECK: icmp eq i8 addrspace(4)* %p, null
194 void cmp_generic(generic char* p) {
199 // Test comparison with NULL.
201 // CHECK-LABEL: cmp_NULL_private
202 // CHECK: icmp eq i8* %p, addrspacecast (i8 addrspace(4)* null to i8*)
203 void cmp_NULL_private(private char* p) {
208 // CHECK-LABEL: cmp_NULL_local
209 // CHECK: icmp eq i8 addrspace(3)* %p, addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*)
210 void cmp_NULL_local(local char* p) {
215 // CHECK-LABEL: cmp_NULL_global
216 // CHECK: icmp eq i8 addrspace(1)* %p, null
217 void cmp_NULL_global(global char* p) {
222 // CHECK-LABEL: cmp_NULL_constant
223 // CHECK: icmp eq i8 addrspace(2)* %p, null
224 char cmp_NULL_constant(constant char* p) {
231 // CHECK-LABEL: cmp_NULL_generic
232 // CHECK: icmp eq i8 addrspace(4)* %p, null
233 void cmp_NULL_generic(generic char* p) {
238 // Test storage 0 as null pointer.
239 // CHECK-LABEL: test_storage_null_pointer
240 // CHECK: store i8* addrspacecast (i8 addrspace(4)* null to i8*), i8* addrspace(4)* %arg_private
241 // CHECK: store i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(3)* addrspace(4)* %arg_local
242 // CHECK: store i8 addrspace(1)* null, i8 addrspace(1)* addrspace(4)* %arg_global
243 // CHECK: store i8 addrspace(2)* null, i8 addrspace(2)* addrspace(4)* %arg_constant
244 // CHECK: store i8 addrspace(4)* null, i8 addrspace(4)* addrspace(4)* %arg_generic
245 void test_storage_null_pointer(private char** arg_private,
246 local char** arg_local,
247 global char** arg_global,
248 constant char** arg_constant,
249 generic char** arg_generic) {
257 // Test storage NULL as null pointer.
258 // CHECK-LABEL: test_storage_null_pointer_NULL
259 // CHECK: store i8* addrspacecast (i8 addrspace(4)* null to i8*), i8* addrspace(4)* %arg_private
260 // CHECK: store i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(3)* addrspace(4)* %arg_local
261 // CHECK: store i8 addrspace(1)* null, i8 addrspace(1)* addrspace(4)* %arg_global
262 // CHECK: store i8 addrspace(2)* null, i8 addrspace(2)* addrspace(4)* %arg_constant
263 // CHECK: store i8 addrspace(4)* null, i8 addrspace(4)* addrspace(4)* %arg_generic
264 void test_storage_null_pointer_NULL(private char** arg_private,
265 local char** arg_local,
266 global char** arg_global,
267 constant char** arg_constant,
268 generic char** arg_generic) {
272 *arg_constant = NULL;
276 // Test pass null pointer to function as argument.
277 void test_pass_null_pointer_arg_calee(private char* arg_private,
278 local char* arg_local,
279 global char* arg_global,
280 constant char* arg_constant,
281 generic char* arg_generic);
283 // CHECK-LABEL: test_pass_null_pointer_arg
284 // CHECK: call void @test_pass_null_pointer_arg_calee(i8* addrspacecast (i8 addrspace(4)* null to i8*), i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(1)* null, i8 addrspace(2)* null, i8 addrspace(4)* null)
285 // CHECK: call void @test_pass_null_pointer_arg_calee(i8* addrspacecast (i8 addrspace(4)* null to i8*), i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*), i8 addrspace(1)* null, i8 addrspace(2)* null, i8 addrspace(4)* null)
286 void test_pass_null_pointer_arg(void) {
287 test_pass_null_pointer_arg_calee(0, 0, 0, 0, 0);
288 test_pass_null_pointer_arg_calee(NULL, NULL, NULL, NULL, NULL);
291 // Test cast null pointer to size_t.
292 void test_cast_null_pointer_to_sizet_calee(size_t arg_private,
298 // CHECK-LABEL: test_cast_null_pointer_to_sizet
299 // CHECK: call void @test_cast_null_pointer_to_sizet_calee(i64 ptrtoint (i8* addrspacecast (i8 addrspace(4)* null to i8*) to i64), i64 ptrtoint (i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*) to i64), i64 0, i64 0, i64 0)
300 // CHECK: call void @test_cast_null_pointer_to_sizet_calee(i64 ptrtoint (i8* addrspacecast (i8 addrspace(4)* null to i8*) to i64), i64 ptrtoint (i8 addrspace(3)* addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*) to i64), i64 0, i64 0, i64 0)
301 void test_cast_null_pointer_to_sizet(void) {
302 test_cast_null_pointer_to_sizet_calee((size_t)((private char*)0),
303 (size_t)((local char*)0),
304 (size_t)((global char*)0),
305 (size_t)((constant char*)0),
306 (size_t)((generic char*)0));
307 test_cast_null_pointer_to_sizet_calee((size_t)((private char*)NULL),
308 (size_t)((local char*)NULL),
309 (size_t)((global char*)NULL),
310 (size_t)((constant char*)0), // NULL cannot be casted to constant pointer since it is defined as a generic pointer
311 (size_t)((generic char*)NULL));
314 // Test comparision between null pointers.
315 #define TEST_EQ00(addr1, addr2) int test_eq00_##addr1##_##addr2(void) { return (addr1 char*)0 == (addr2 char*)0; }
316 #define TEST_EQ0N(addr1, addr2) int test_eq0N_##addr1##_##addr2(void) { return (addr1 char*)0 == (addr2 char*)NULL; }
317 #define TEST_EQN0(addr1, addr2) int test_eqN0_##addr1##_##addr2(void) { return (addr1 char*)NULL == (addr2 char*)0; }
318 #define TEST_EQNN(addr1, addr2) int test_eqNN_##addr1##_##addr2(void) { return (addr1 char*)0 == (addr2 char*)NULL; }
319 #define TEST_NE00(addr1, addr2) int test_ne00_##addr1##_##addr2(void) { return (addr1 char*)0 != (addr2 char*)0; }
320 #define TEST_NE0N(addr1, addr2) int test_ne0N_##addr1##_##addr2(void) { return (addr1 char*)0 != (addr2 char*)NULL; }
321 #define TEST_NEN0(addr1, addr2) int test_neN0_##addr1##_##addr2(void) { return (addr1 char*)NULL != (addr2 char*)0; }
322 #define TEST_NENN(addr1, addr2) int test_neNN_##addr1##_##addr2(void) { return (addr1 char*)0 != (addr2 char*)NULL; }
323 #define TEST(addr1, addr2) \
324 TEST_EQ00(addr1, addr2) \
325 TEST_EQ0N(addr1, addr2) \
326 TEST_EQN0(addr1, addr2) \
327 TEST_EQNN(addr1, addr2) \
328 TEST_NE00(addr1, addr2) \
329 TEST_NE0N(addr1, addr2) \
330 TEST_NEN0(addr1, addr2) \
331 TEST_NENN(addr1, addr2)
333 // CHECK-LABEL: test_eq00_generic_private
335 // CHECK-LABEL: test_eq0N_generic_private
337 // CHECK-LABEL: test_eqN0_generic_private
339 // CHECK-LABEL: test_eqNN_generic_private
341 // CHECK-LABEL: test_ne00_generic_private
343 // CHECK-LABEL: test_ne0N_generic_private
345 // CHECK-LABEL: test_neN0_generic_private
347 // CHECK-LABEL: test_neNN_generic_private
349 TEST(generic, private)
351 // CHECK-LABEL: test_eq00_generic_local
353 // CHECK-LABEL: test_eq0N_generic_local
355 // CHECK-LABEL: test_eqN0_generic_local
357 // CHECK-LABEL: test_eqNN_generic_local
359 // CHECK-LABEL: test_ne00_generic_local
361 // CHECK-LABEL: test_ne0N_generic_local
363 // CHECK-LABEL: test_neN0_generic_local
365 // CHECK-LABEL: test_neNN_generic_local
369 // CHECK-LABEL: test_eq00_generic_global
371 // CHECK-LABEL: test_eq0N_generic_global
373 // CHECK-LABEL: test_eqN0_generic_global
375 // CHECK-LABEL: test_eqNN_generic_global
377 // CHECK-LABEL: test_ne00_generic_global
379 // CHECK-LABEL: test_ne0N_generic_global
381 // CHECK-LABEL: test_neN0_generic_global
383 // CHECK-LABEL: test_neNN_generic_global
385 TEST(generic, global)
387 // CHECK-LABEL: test_eq00_generic_generic
389 // CHECK-LABEL: test_eq0N_generic_generic
391 // CHECK-LABEL: test_eqN0_generic_generic
393 // CHECK-LABEL: test_eqNN_generic_generic
395 // CHECK-LABEL: test_ne00_generic_generic
397 // CHECK-LABEL: test_ne0N_generic_generic
399 // CHECK-LABEL: test_neN0_generic_generic
401 // CHECK-LABEL: test_neNN_generic_generic
403 TEST(generic, generic)
405 // CHECK-LABEL: test_eq00_constant_constant
407 TEST_EQ00(constant, constant)
409 // Test cast to bool.
411 // CHECK-LABEL: cast_bool_private
412 // CHECK: icmp eq i8* %p, addrspacecast (i8 addrspace(4)* null to i8*)
413 void cast_bool_private(private char* p) {
418 // CHECK-LABEL: cast_bool_local
419 // CHECK: icmp eq i8 addrspace(3)* %p, addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*)
420 void cast_bool_local(local char* p) {
425 // CHECK-LABEL: cast_bool_global
426 // CHECK: icmp eq i8 addrspace(1)* %p, null
427 void cast_bool_global(global char* p) {
432 // CHECK-LABEL: cast_bool_constant
433 // CHECK: icmp eq i8 addrspace(2)* %p, null
434 char cast_bool_constant(constant char* p) {
441 // CHECK-LABEL: cast_bool_generic
442 // CHECK: icmp eq i8 addrspace(4)* %p, null
443 void cast_bool_generic(generic char* p) {
448 // Test initialize a struct using memset.
449 // For large structures which is mostly zero, clang generats llvm.memset for
450 // the zero part and store for non-zero members.
456 // CHECK-LABEL: test_memset
457 // CHECK: call void @llvm.memset.p0i8.i64(i8* {{.*}}, i8 0, i64 32, i32 8, i1 false)
458 // CHECK: store i8* addrspacecast (i8 addrspace(4)* null to i8*), i8** {{.*}}
459 StructTy3 test_memset(void) {
460 StructTy3 S3 = {0, 0, 0, 0, 0};
464 // Test casting literal 0 to pointer.
465 // A 0 literal casted to pointer should become a null pointer.
467 // CHECK-LABEL: test_cast_0_to_ptr
468 // CHECK: ret i32* addrspacecast (i32 addrspace(4)* null to i32*)
469 private int* test_cast_0_to_ptr(void) {
470 return (private int*)0;
473 // Test casting non-literal integer with 0 value to pointer.
474 // A non-literal integer expression with 0 value is casted to a pointer with
477 // CHECK-LABEL: test_cast_int_to_ptr1
478 // CHECK: ret i32* null
479 private int* test_cast_int_to_ptr1(void) {
480 return (private int*)((void)0, 0);
483 // CHECK-LABEL: test_cast_int_to_ptr2
484 // CHECK: ret i32* null
485 private int* test_cast_int_to_ptr2(void) {
487 return (private int*)x;
490 // Test logical operations.
491 // CHECK-LABEL: test_not_nullptr
493 int test_not_nullptr(void) {
494 return !(private char*)NULL;
497 // CHECK-LABEL: test_and_nullptr
499 int test_and_nullptr(int a) {
500 return a && ((private char*)NULL);
503 // CHECK-LABEL: test_not_ptr
504 // CHECK: %[[lnot:.*]] = icmp eq i8* %p, addrspacecast (i8 addrspace(4)* null to i8*)
505 // CHECK: %[[lnot_ext:.*]] = zext i1 %[[lnot]] to i32
506 // CHECK: ret i32 %[[lnot_ext]]
507 int test_not_ptr(private char* p) {
510 // CHECK-LABEL: test_and_ptr
511 // CHECK: %[[tobool:.*]] = icmp ne i8* %p1, addrspacecast (i8 addrspace(4)* null to i8*)
512 // CHECK: %[[tobool1:.*]] = icmp ne i8 addrspace(3)* %p2, addrspacecast (i8 addrspace(4)* null to i8 addrspace(3)*)
513 // CHECK: %[[res:.*]] = and i1 %[[tobool]], %[[tobool1]]
514 // CHECK: %[[land_ext:.*]] = zext i1 %[[res]] to i32
515 // CHECK: ret i32 %[[land_ext]]
516 int test_and_ptr(private char* p1, local char* p2) {
520 // Test folding of null pointer in function scope.
521 // NOOPT-LABEL: test_fold
522 // NOOPT: call void @test_fold_callee
523 // NOOPT: store i32 addrspace(1)* null, i32 addrspace(1)** %glob, align 4
524 // NOOPT: %{{.*}} = sub i64 %{{.*}}, 0
525 // NOOPT: call void @test_fold_callee
526 // NOOPT: %{{.*}} = add nsw i64 %{{.*}}, sext (i32 ptrtoint (i32* addrspacecast (i32 addrspace(4)* null to i32*) to i32) to i64)
527 // NOOPT: %{{.*}} = sub nsw i64 %{{.*}}, 1
528 void test_fold_callee(void);
529 void test_fold(void) {
530 global int* glob = (test_fold_callee(), (global int*)(generic char*)0);
531 long x = glob - (global int*)(generic char*)0;
532 x = x + (int)(test_fold_callee(), (private int*)(generic char*)(global short*)0);
533 x = x - (int)((private int*)0 == (private int*)(generic char*)0);