llvm/test/CodeGen/AMDGPU/nomerge.ll

; RUN: llc -mtriple=amdgpu10.30-amd-amdhsa -global-isel=0 < %s | FileCheck %s
; RUN: llc -mtriple=amdgpu10.30-amd-amdhsa -global-isel=1 < %s | FileCheck %s
; RUN: llc -mtriple=amdgpu10.30-amd-amdhsa -global-isel=0 -stop-after=finalize-isel < %s | FileCheck --check-prefix=MIR %s
; RUN: llc -mtriple=amdgpu10.30-amd-amdhsa -global-isel=1 -stop-after=finalize-isel < %s | FileCheck --check-prefix=MIR %s

declare void @report() noreturn
declare void @bar()

; CHECK-LABEL: {{^}}noreturn_merge:
; CHECK:       s_swappc_b64
; CHECK-NOT:   s_swappc_b64
; MIR-LABEL:   {{^}}name: noreturn_merge
; MIR-NOT:     nomerge
define void @noreturn_merge(i1 inreg %c) {
  br i1 %c, label %a, label %b
a:
  call void @report()
  unreachable
b:
  call void @report()
  unreachable
}

; CHECK-LABEL: {{^}}noreturn_nomerge:
; CHECK:       s_swappc_b64
; CHECK:       s_swappc_b64
; CHECK-NOT:   s_swappc_b64
; MIR-LABEL:   {{^}}name: noreturn_nomerge
; MIR:         nomerge {{.*}}SI_CALL
; MIR:         nomerge {{.*}}SI_CALL
define void @noreturn_nomerge(i1 inreg %c) {
  br i1 %c, label %a, label %b
a:
  call void @report() nomerge
  unreachable
b:
  call void @report() nomerge
  unreachable
}

; CHECK-LABEL: {{^}}tail_merge:
; CHECK:       s_setpc_b64
; CHECK-NOT:   s_setpc_b64
; MIR-LABEL:   {{^}}name: tail_merge
; MIR-NOT:     nomerge
define void @tail_merge(i1 inreg %c) {
  br i1 %c, label %a, label %b
a:
  tail call void @bar()
  ret void
b:
  tail call void @bar()
  ret void
}

; CHECK-LABEL: {{^}}tail_nomerge:
; CHECK:       s_setpc_b64
; CHECK:       s_setpc_b64
; CHECK-NOT:   s_setpc_b64
; MIR-LABEL:   {{^}}name: tail_nomerge
; MIR:         nomerge SI_TCRETURN
; MIR:         nomerge SI_TCRETURN
define void @tail_nomerge(i1 inreg %c) {
  br i1 %c, label %a, label %b
a:
  tail call void @bar() nomerge
  ret void
b:
  tail call void @bar() nomerge
  ret void
}