1; This is a regression test for a bug in the AMDGPU Propagate Attributes pass
2; where a call instruction's callee could be replaced with a function pointer
3; passed to the original call instruction as an argument.
4;
5; Example:
6; `call void @f(void ()* @g)`
7; could become
8; `call void @g(void ()* @g.1)`
9; which is invalid IR.
10
11; RUN: opt -S -mtriple=amdgcn-amd-amdhsa -amdgpu-propagate-attributes-late %s | FileCheck %s
12
13; CHECK-LABEL: define amdgpu_kernel void @thiswasabug() #0
14; CHECK-NOT: call void @g(void ()* @g.1)
15; CHECK-DAG: call void @f(void ()* @g.1)
16; CHECK-DAG: call void @g()
17define amdgpu_kernel void @thiswasabug() #0 {
18    ; no replacement, but @g should be renamed to @g.1
19    call void @f(void ()* @g)
20
21    ; this should call the clone, which takes the name @g
22    call void @g()
23    ret void
24}
25
26define private void @f(void ()* nocapture %0) #0 {
27    ret void
28}
29
30; In order to expose this bug, it is necessary that `g` have one of the
31; propagated attributes, so that a clone and substitution would take place if g
32; were actually the function being called.
33; CHECK-DAG: define private void @g.1() #1
34; CHECK-DAG: define internal void @g() #2
35define private void @g() #1 {
36    ret void
37}
38
39attributes #0 = { noinline }
40attributes #1 = { noinline "amdgpu-waves-per-eu"="1,10" }
41