1; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
2
3; Checks how NVPTX lowers alloca buffers and their passing to functions.
4;
5; Produced with the following CUDA code:
6;  extern "C" __attribute__((device)) void callee(float* f, char* buf);
7;
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];
14;    callee(a, buf);
15;  }
16
17; CHECK: .visible .entry kernel_func
18define void @kernel_func(float* %a) {
19entry:
20  %buf = alloca [16 x i8], align 4
21
22; CHECK: .local .align 4 .b8 	__local_depot0[16]
23; CHECK: mov.u64 %rd[[BUF_REG:[0-9]+]]
24; CHECK: cvta.local.u64 %SP, %rd[[BUF_REG]]
25
26; CHECK: ld.param.u64 %rd[[A_REG:[0-9]+]], [kernel_func_param_0]
27; CHECK: ld.f32 %f[[A0_REG:[0-9]+]], [%rd[[A_REG]]]
28; CHECK: st.f32 [%SP+0], %f[[A0_REG]]
29
30  %0 = load float* %a, align 4
31  %1 = bitcast [16 x i8]* %buf to float*
32  store float %0, float* %1, align 4
33  %arrayidx2 = getelementptr inbounds float* %a, i64 1
34  %2 = load float* %arrayidx2, align 4
35  %arrayidx3 = getelementptr inbounds [16 x i8]* %buf, i64 0, i64 1
36  %3 = bitcast i8* %arrayidx3 to float*
37  store float %2, float* %3, align 4
38  %arrayidx4 = getelementptr inbounds float* %a, i64 2
39  %4 = load float* %arrayidx4, align 4
40  %arrayidx5 = getelementptr inbounds [16 x i8]* %buf, i64 0, i64 2
41  %5 = bitcast i8* %arrayidx5 to float*
42  store float %4, float* %5, align 4
43  %arrayidx6 = getelementptr inbounds float* %a, i64 3
44  %6 = load float* %arrayidx6, align 4
45  %arrayidx7 = getelementptr inbounds [16 x i8]* %buf, i64 0, i64 3
46  %7 = bitcast i8* %arrayidx7 to float*
47  store float %6, float* %7, align 4
48
49; CHECK: add.u64 %rd[[SP_REG:[0-9]+]], %SP, 0
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
55; CHECK-NEXT:   callee,
56
57  %arraydecay = getelementptr inbounds [16 x i8]* %buf, i64 0, i64 0
58  call void @callee(float* %a, i8* %arraydecay) #2
59  ret void
60}
61
62declare void @callee(float*, i8*)
63
64!nvvm.annotations = !{!0}
65
66!0 = !{void (float*)* @kernel_func, !"kernel", i32 1}
67