1 ; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
3 ; Checks how NVPTX lowers alloca buffers and their passing to functions.
5 ; Produced with the following CUDA code:
6 ; extern "C" __attribute__((device)) void callee(float* f, char* buf);
8 ; extern "C" __attribute__((global)) void kernel_func(float* a) {
9 ; char buf[4 * sizeof(float)];
10 ; *(reinterpret_cast<float*>(&buf[0])) = a[0];
11 ; *(reinterpret_cast<float*>(&buf[1])) = a[1];
12 ; *(reinterpret_cast<float*>(&buf[2])) = a[2];
13 ; *(reinterpret_cast<float*>(&buf[3])) = a[3];
17 ; CHECK: .visible .entry kernel_func
18 define void @kernel_func(float* %a) {
20 %buf = alloca [16 x i8], align 4
22 ; CHECK: .local .align 4 .b8 __local_depot0[16]
25 ; CHECK: ld.param.u64 %rd[[A_REG:[0-9]+]], [kernel_func_param_0]
26 ; CHECK: cvta.to.global.u64 %rd[[A1_REG:[0-9]+]], %rd[[A_REG]]
27 ; CHECK: add.u64 %rd[[SP_REG:[0-9]+]], %SP, 0
28 ; CHECK: ld.global.f32 %f[[A0_REG:[0-9]+]], [%rd[[A1_REG]]]
29 ; CHECK: st.local.f32 [{{%rd[0-9]+}}], %f[[A0_REG]]
31 %0 = load float, float* %a, align 4
32 %1 = bitcast [16 x i8]* %buf to float*
33 store float %0, float* %1, align 4
34 %arrayidx2 = getelementptr inbounds float, float* %a, i64 1
35 %2 = load float, float* %arrayidx2, align 4
36 %arrayidx3 = getelementptr inbounds [16 x i8], [16 x i8]* %buf, i64 0, i64 1
37 %3 = bitcast i8* %arrayidx3 to float*
38 store float %2, float* %3, align 4
39 %arrayidx4 = getelementptr inbounds float, float* %a, i64 2
40 %4 = load float, float* %arrayidx4, align 4
41 %arrayidx5 = getelementptr inbounds [16 x i8], [16 x i8]* %buf, i64 0, i64 2
42 %5 = bitcast i8* %arrayidx5 to float*
43 store float %4, float* %5, align 4
44 %arrayidx6 = getelementptr inbounds float, float* %a, i64 3
45 %6 = load float, float* %arrayidx6, align 4
46 %arrayidx7 = getelementptr inbounds [16 x i8], [16 x i8]* %buf, i64 0, i64 3
47 %7 = bitcast i8* %arrayidx7 to float*
48 store float %6, float* %7, align 4
50 ; CHECK: .param .b64 param0;
51 ; CHECK-NEXT: st.param.b64 [param0+0], %rd[[A_REG]]
52 ; CHECK-NEXT: .param .b64 param1;
53 ; CHECK-NEXT: st.param.b64 [param1+0], %rd[[SP_REG]]
54 ; CHECK-NEXT: call.uni
57 %arraydecay = getelementptr inbounds [16 x i8], [16 x i8]* %buf, i64 0, i64 0
58 call void @callee(float* %a, i8* %arraydecay) #2
62 declare void @callee(float*, i8*)
64 !nvvm.annotations = !{!0}
66 !0 = !{void (float*)* @kernel_func, !"kernel", i32 1}