1; RUN: opt -S -mtriple=amdgcn-amd- -amdgpu-annotate-kernel-features %s | FileCheck %s
2
3; Test to ensure recursive functions exhibit proper behaviour
4; Test to generate fibonacci numbers
5
6; CHECK: define i32 @fib(i32 %n) #[[FIB:[0-9]+]] {
7define i32 @fib(i32 %n) #0 {
8  %cmp1 = icmp eq i32 %n, 0
9  br i1 %cmp1, label %exit, label %cont1
10
11cont1:
12  %cmp2 = icmp eq i32 %n, 1
13  br i1 %cmp2, label %exit, label %cont2
14
15cont2:
16  %nm1 = sub i32 %n, 1
17  %fibm1 = call i32 @fib(i32 %nm1)
18  %nm2 = sub i32 %n, 2
19  %fibm2 = call i32 @fib(i32 %nm2)
20  %retval = add i32 %fibm1, %fibm2
21
22  ret i32 %retval
23
24exit:
25  ret i32 1
26}
27
28; CHECK: define amdgpu_kernel void @kernel(i32 addrspace(1)* %m) #[[KERNEL:[0-9]+]] {
29define amdgpu_kernel void @kernel(i32 addrspace(1)* %m) #1 {
30  %r = call i32 @fib(i32 5)
31  store i32 %r, i32 addrspace(1)* %m
32  ret void
33}
34
35attributes #1 = { "uniform-work-group-size"="true" }
36
37; CHECK: attributes #[[FIB]] = { "uniform-work-group-size"="true" }
38; CHECK: attributes #[[KERNEL]] = { "amdgpu-calls" "uniform-work-group-size"="true" }
39