1 ; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
2 ; RUN: %if ptxas %{ llc < %s -march=nvptx64 -mcpu=sm_20 | %ptxas-verify %}
4 ; Checks how NVPTX lowers alloca buffers and their passing to functions.
6 ; Produced with the following CUDA code:
7 ; extern "C" __attribute__((device)) void callee(ptr f, char* buf);
9 ; extern "C" __attribute__((global)) void kernel_func(ptr a) {
10 ; char buf[4 * sizeof(float)];
11 ; *(reinterpret_cast<ptr>(&buf[0])) = a[0];
12 ; *(reinterpret_cast<ptr>(&buf[1])) = a[1];
13 ; *(reinterpret_cast<ptr>(&buf[2])) = a[2];
14 ; *(reinterpret_cast<ptr>(&buf[3])) = a[3];
18 ; CHECK: .visible .entry kernel_func
19 define void @kernel_func(ptr %a) {
21 %buf = alloca [16 x i8], align 4
23 ; CHECK: .local .align 4 .b8 __local_depot0[16]
26 ; CHECK: ld.param.u64 %rd[[A_REG:[0-9]+]], [kernel_func_param_0]
27 ; CHECK: cvta.to.global.u64 %rd[[A1_REG:[0-9]+]], %rd[[A_REG]]
28 ; CHECK: add.u64 %rd[[SP_REG:[0-9]+]], %SP, 0
29 ; CHECK: ld.global.f32 %f[[A0_REG:[0-9]+]], [%rd[[A1_REG]]]
30 ; CHECK: st.local.f32 [{{%rd[0-9]+}}], %f[[A0_REG]]
32 %0 = load float, ptr %a, align 4
33 store float %0, ptr %buf, align 4
34 %arrayidx2 = getelementptr inbounds float, ptr %a, i64 1
35 %1 = load float, ptr %arrayidx2, align 4
36 %arrayidx3 = getelementptr inbounds [16 x i8], ptr %buf, i64 0, i64 1
37 store float %1, ptr %arrayidx3, align 4
38 %arrayidx4 = getelementptr inbounds float, ptr %a, i64 2
39 %2 = load float, ptr %arrayidx4, align 4
40 %arrayidx5 = getelementptr inbounds [16 x i8], ptr %buf, i64 0, i64 2
41 store float %2, ptr %arrayidx5, align 4
42 %arrayidx6 = getelementptr inbounds float, ptr %a, i64 3
43 %3 = load float, ptr %arrayidx6, align 4
44 %arrayidx7 = getelementptr inbounds [16 x i8], ptr %buf, i64 0, i64 3
45 store float %3, ptr %arrayidx7, align 4
47 ; CHECK: .param .b64 param0;
48 ; CHECK-NEXT: st.param.b64 [param0+0], %rd[[A_REG]]
49 ; CHECK-NEXT: .param .b64 param1;
50 ; CHECK-NEXT: st.param.b64 [param1+0], %rd[[SP_REG]]
51 ; CHECK-NEXT: call.uni
54 call void @callee(ptr %a, ptr %buf) #2
58 declare void @callee(ptr, ptr)
60 !nvvm.annotations = !{!0}
62 !0 = !{ptr @kernel_func, !"kernel", i32 1}