1 // RUN: %clang_cc1 -emit-llvm %s -o - -fcuda-is-device -triple nvptx-unknown-unknown | FileCheck %s
2
3 // Verifies Clang emits correct address spaces and addrspacecast instructions
4 // for CUDA code.
5
6 #include "Inputs/cuda.h"
7
8 // CHECK: @i = addrspace(1) externally_initialized global
9 __device__ int i;
10
11 // CHECK: @j = addrspace(4) externally_initialized global
12 __constant__ int j;
13
14 // CHECK: @k = addrspace(3) global
15 __shared__ int k;
16
17 struct MyStruct {
18 int data1;
19 int data2;
20 };
21
22 // CHECK: @_ZZ5func0vE1a = internal addrspace(3) global %struct.MyStruct zeroinitializer
23 // CHECK: @_ZZ5func1vE1a = internal addrspace(3) global float 0.000000e+00
24 // CHECK: @_ZZ5func2vE1a = internal addrspace(3) global [256 x float] zeroinitializer
25 // CHECK: @_ZZ5func3vE1a = internal addrspace(3) global float 0.000000e+00
26 // CHECK: @_ZZ5func4vE1a = internal addrspace(3) global float 0.000000e+00
27 // CHECK: @b = addrspace(3) global float undef
28 // CHECK: @c = addrspace(3) global %struct.c undef
29 // CHECK @d = addrspace(3) global %struct.d undef
30
foo()31 __device__ void foo() {
32 // CHECK: load i32, i32* addrspacecast (i32 addrspace(1)* @i to i32*)
33 i++;
34
35 // CHECK: load i32, i32* addrspacecast (i32 addrspace(4)* @j to i32*)
36 j++;
37
38 // CHECK: load i32, i32* addrspacecast (i32 addrspace(3)* @k to i32*)
39 k++;
40
41 static int li;
42 // CHECK: load i32, i32* addrspacecast (i32 addrspace(1)* @_ZZ3foovE2li to i32*)
43 li++;
44
45 __constant__ int lj;
46 // CHECK: load i32, i32* addrspacecast (i32 addrspace(4)* @_ZZ3foovE2lj to i32*)
47 lj++;
48
49 __shared__ int lk;
50 // CHECK: load i32, i32* addrspacecast (i32 addrspace(3)* @_ZZ3foovE2lk to i32*)
51 lk++;
52 }
53
func0()54 __device__ void func0() {
55 __shared__ MyStruct a;
56 MyStruct *ap = &a; // composite type
57 ap->data1 = 1;
58 ap->data2 = 2;
59 }
60 // CHECK: define void @_Z5func0v()
61 // CHECK: store %struct.MyStruct* addrspacecast (%struct.MyStruct addrspace(3)* @_ZZ5func0vE1a to %struct.MyStruct*), %struct.MyStruct** %ap
62
callee(float * ap)63 __device__ void callee(float *ap) {
64 *ap = 1.0f;
65 }
66
func1()67 __device__ void func1() {
68 __shared__ float a;
69 callee(&a); // implicit cast from parameters
70 }
71 // CHECK: define void @_Z5func1v()
72 // CHECK: call void @_Z6calleePf(float* addrspacecast (float addrspace(3)* @_ZZ5func1vE1a to float*))
73
func2()74 __device__ void func2() {
75 __shared__ float a[256];
76 float *ap = &a[128]; // implicit cast from a decayed array
77 *ap = 1.0f;
78 }
79 // CHECK: define void @_Z5func2v()
80 // CHECK: store float* getelementptr inbounds ([256 x float], [256 x float]* addrspacecast ([256 x float] addrspace(3)* @_ZZ5func2vE1a to [256 x float]*), i32 0, i32 128), float** %ap
81
func3()82 __device__ void func3() {
83 __shared__ float a;
84 float *ap = reinterpret_cast<float *>(&a); // explicit cast
85 *ap = 1.0f;
86 }
87 // CHECK: define void @_Z5func3v()
88 // CHECK: store float* addrspacecast (float addrspace(3)* @_ZZ5func3vE1a to float*), float** %ap
89
func4()90 __device__ void func4() {
91 __shared__ float a;
92 float *ap = (float *)&a; // explicit c-style cast
93 *ap = 1.0f;
94 }
95 // CHECK: define void @_Z5func4v()
96 // CHECK: store float* addrspacecast (float addrspace(3)* @_ZZ5func4vE1a to float*), float** %ap
97
98 __shared__ float b;
99
func5()100 __device__ float *func5() {
101 return &b; // implicit cast from a return value
102 }
103 // CHECK: define float* @_Z5func5v()
104 // CHECK: ret float* addrspacecast (float addrspace(3)* @b to float*)
105
106 struct StructWithCtor {
StructWithCtorStructWithCtor107 __device__ StructWithCtor(): data(1) {}
StructWithCtorStructWithCtor108 __device__ StructWithCtor(const StructWithCtor &second): data(second.data) {}
getDataStructWithCtor109 __device__ int getData() { return data; }
110 int data;
111 };
112
construct_shared_struct()113 __device__ int construct_shared_struct() {
114 // CHECK-LABEL: define i32 @_Z23construct_shared_structv()
115 __shared__ StructWithCtor s;
116 // CHECK: call void @_ZN14StructWithCtorC1Ev(%struct.StructWithCtor* addrspacecast (%struct.StructWithCtor addrspace(3)* @_ZZ23construct_shared_structvE1s to %struct.StructWithCtor*))
117 __shared__ StructWithCtor t(s);
118 // CHECK: call void @_ZN14StructWithCtorC1ERKS_(%struct.StructWithCtor* addrspacecast (%struct.StructWithCtor addrspace(3)* @_ZZ23construct_shared_structvE1t to %struct.StructWithCtor*), %struct.StructWithCtor* dereferenceable(4) addrspacecast (%struct.StructWithCtor addrspace(3)* @_ZZ23construct_shared_structvE1s to %struct.StructWithCtor*))
119 return t.getData();
120 // CHECK: call i32 @_ZN14StructWithCtor7getDataEv(%struct.StructWithCtor* addrspacecast (%struct.StructWithCtor addrspace(3)* @_ZZ23construct_shared_structvE1t to %struct.StructWithCtor*))
121 }
122
123 // Make sure we allow __shared__ structures with default or empty constructors.
124 struct c {
125 int i;
126 };
127 __shared__ struct c c;
128
129 struct d {
130 int i;
dd131 d() {}
132 };
133 __shared__ struct d d;
134