llvm/test/CodeGen/AMDGPU/nested-calls.ll

; RUN: llc -march=amdgcn -mcpu=fiji -mattr=-flat-for-global -amdgpu-sroa=0 -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=GCN -check-prefix=VI %s
; RUN: llc -march=amdgcn -mcpu=hawaii -amdgpu-sroa=0 -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=GCN -check-prefix=CI %s
; RUN: llc -march=amdgcn -mcpu=gfx900 -mattr=-flat-for-global -amdgpu-sroa=0 -verify-machineinstrs < %s | FileCheck -enable-var-scope -check-prefix=GCN -check-prefix=GFX9 -check-prefix=VI %s

; Test calls when called by other callable functions rather than
; kernels.

declare void @external_void_func_i32(i32) #0

; GCN-LABEL: {{^}}test_func_call_external_void_func_i32_imm:
; GCN: s_waitcnt
; GCN: s_mov_b32 s5, s32
; Spill CSR VGPR used for SGPR spilling
; GCN: buffer_store_dword v32, off, s[0:3], s5 offset:4
; GCN-DAG: s_add_u32 s32, s32, 0x200
; GCN-DAG: v_writelane_b32 v32, s33, 0
; GCN-DAG: v_writelane_b32 v32, s34, 1
; GCN-DAG: v_writelane_b32 v32, s35, 2

; GCN: s_swappc_b64

; GCN: v_readlane_b32 s35, v32, 2
; GCN: v_readlane_b32 s34, v32, 1
; GCN: v_readlane_b32 s33, v32, 0
; GCN: buffer_load_dword v32, off, s[0:3], s5 offset:4
; GCN: s_sub_u32 s32, s32, 0x200
; GCN: s_setpc_b64
define void @test_func_call_external_void_func_i32_imm() #0 {
  call void @external_void_func_i32(i32 42)
  ret void
}

; GCN-LABEL: {{^}}test_func_call_external_void_func_i32_imm_stack_use:
; GCN: s_waitcnt
; GCN: s_mov_b32 s5, s32
; GCN: s_add_u32 s32, s32, 0x1200{{$}}
; GCN: buffer_store_dword v{{[0-9]+}}, off, s[0:3], s5 offset
; GCN: s_swappc_b64
; GCN: s_sub_u32 s32, s32, 0x1200{{$}}
; GCN: s_setpc_b64
define void @test_func_call_external_void_func_i32_imm_stack_use() #0 {
  %alloca = alloca [16 x i32], align 4
  %gep0 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 0
  %gep15 = getelementptr inbounds [16 x i32], [16 x i32]* %alloca, i32 0, i32 16
  store volatile i32 0, i32* %gep0
  store volatile i32 0, i32* %gep15
  call void @external_void_func_i32(i32 42)
  ret void
}

attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind noinline }