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// RUN: %clang_cc1 -emit-llvm %s -o - -fcuda-is-device -triple nvptx-unknown-unknown | FileCheck %s
// Verifies Clang emits correct address spaces and addrspacecast instructions
// for CUDA code.
#include "Inputs/cuda.h"
// CHECK: @i = addrspace(1) global
__device__ int i;
// CHECK: @j = addrspace(4) global
__constant__ int j;
// CHECK: @k = addrspace(3) global
__shared__ int k;
struct MyStruct {
int data1;
int data2;
};
// CHECK: @_ZZ5func0vE1a = internal addrspace(3) global %struct.MyStruct zeroinitializer
// CHECK: @_ZZ5func1vE1a = internal addrspace(3) global float 0.000000e+00
// CHECK: @_ZZ5func2vE1a = internal addrspace(3) global [256 x float] zeroinitializer
// CHECK: @_ZZ5func3vE1a = internal addrspace(3) global float 0.000000e+00
// CHECK: @_ZZ5func4vE1a = internal addrspace(3) global float 0.000000e+00
// CHECK: @b = addrspace(3) global float 0.000000e+00
__device__ void foo() {
// CHECK: load i32* addrspacecast (i32 addrspace(1)* @i to i32*)
i++;
// CHECK: load i32* addrspacecast (i32 addrspace(4)* @j to i32*)
j++;
// CHECK: load i32* addrspacecast (i32 addrspace(3)* @k to i32*)
k++;
static int li;
// CHECK: load i32* addrspacecast (i32 addrspace(1)* @_ZZ3foovE2li to i32*)
li++;
__constant__ int lj;
// CHECK: load i32* addrspacecast (i32 addrspace(4)* @_ZZ3foovE2lj to i32*)
lj++;
__shared__ int lk;
// CHECK: load i32* addrspacecast (i32 addrspace(3)* @_ZZ3foovE2lk to i32*)
lk++;
}
__device__ void func0() {
__shared__ MyStruct a;
MyStruct *ap = &a; // composite type
ap->data1 = 1;
ap->data2 = 2;
}
// CHECK: define void @_Z5func0v()
// CHECK: store %struct.MyStruct* addrspacecast (%struct.MyStruct addrspace(3)* @_ZZ5func0vE1a to %struct.MyStruct*), %struct.MyStruct** %ap
__device__ void callee(float *ap) {
*ap = 1.0f;
}
__device__ void func1() {
__shared__ float a;
callee(&a); // implicit cast from parameters
}
// CHECK: define void @_Z5func1v()
// CHECK: call void @_Z6calleePf(float* addrspacecast (float addrspace(3)* @_ZZ5func1vE1a to float*))
__device__ void func2() {
__shared__ float a[256];
float *ap = &a[128]; // implicit cast from a decayed array
*ap = 1.0f;
}
// CHECK: define void @_Z5func2v()
// CHECK: store float* getelementptr inbounds ([256 x float]* addrspacecast ([256 x float] addrspace(3)* @_ZZ5func2vE1a to [256 x float]*), i32 0, i32 128), float** %ap
__device__ void func3() {
__shared__ float a;
float *ap = reinterpret_cast<float *>(&a); // explicit cast
*ap = 1.0f;
}
// CHECK: define void @_Z5func3v()
// CHECK: store float* addrspacecast (float addrspace(3)* @_ZZ5func3vE1a to float*), float** %ap
__device__ void func4() {
__shared__ float a;
float *ap = (float *)&a; // explicit c-style cast
*ap = 1.0f;
}
// CHECK: define void @_Z5func4v()
// CHECK: store float* addrspacecast (float addrspace(3)* @_ZZ5func4vE1a to float*), float** %ap
__shared__ float b;
__device__ float *func5() {
return &b; // implicit cast from a return value
}
// CHECK: define float* @_Z5func5v()
// CHECK: ret float* addrspacecast (float addrspace(3)* @b to float*)
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