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; RUN: opt -S -mtriple=amdgcn-amd- -amdgpu-annotate-kernel-features %s | FileCheck %s
; Test to ensure recursive functions exhibit proper behaviour
; Test to generate fibonacci numbers
; CHECK: define i32 @fib(i32 %n) #[[FIB:[0-9]+]] {
define i32 @fib(i32 %n) #0 {
%cmp1 = icmp eq i32 %n, 0
br i1 %cmp1, label %exit, label %cont1
cont1:
%cmp2 = icmp eq i32 %n, 1
br i1 %cmp2, label %exit, label %cont2
cont2:
%nm1 = sub i32 %n, 1
%fibm1 = call i32 @fib(i32 %nm1)
%nm2 = sub i32 %n, 2
%fibm2 = call i32 @fib(i32 %nm2)
%retval = add i32 %fibm1, %fibm2
ret i32 %retval
exit:
ret i32 1
}
; CHECK: define amdgpu_kernel void @kernel(i32 addrspace(1)* %m) #[[FIB]] {
define amdgpu_kernel void @kernel(i32 addrspace(1)* %m) #1 {
%r = call i32 @fib(i32 5)
store i32 %r, i32 addrspace(1)* %m
ret void
}
attributes #1 = { "uniform-work-group-size"="true" }
; CHECK: attributes #[[FIB]] = { "uniform-work-group-size"="true" }
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