llvm/test/CodeGen/RISCV/nomerge.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=riscv64 -o - | FileCheck %s
; RUN: llc < %s -mtriple=riscv64 -global-isel -global-isel-abort=1 -o - | FileCheck --check-prefix=GISEL %s

define void @foo(i32 %i) nounwind {
; CHECK-LABEL: foo:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    addi sp, sp, -16
; CHECK-NEXT:    sd ra, 8(sp) # 8-byte Folded Spill
; CHECK-NEXT:    li a1, 7
; CHECK-NEXT:    sext.w a0, a0
; CHECK-NEXT:    beq a0, a1, .LBB0_3
; CHECK-NEXT:  # %bb.1: # %entry
; CHECK-NEXT:    li a1, 5
; CHECK-NEXT:    bne a0, a1, .LBB0_4
; CHECK-NEXT:  # %bb.2: # %if.then
; CHECK-NEXT:    call bar
; CHECK-NEXT:    j .LBB0_4
; CHECK-NEXT:  .LBB0_3: # %if.then2
; CHECK-NEXT:    call bar
; CHECK-NEXT:  .LBB0_4: # %if.end3
; CHECK-NEXT:    ld ra, 8(sp) # 8-byte Folded Reload
; CHECK-NEXT:    addi sp, sp, 16
; CHECK-NEXT:    tail bar
;
; GISEL-LABEL: foo:
; GISEL:       # %bb.0: # %entry
; GISEL-NEXT:    addi sp, sp, -16
; GISEL-NEXT:    sd ra, 8(sp) # 8-byte Folded Spill
; GISEL-NEXT:    li a1, 7
; GISEL-NEXT:    sext.w a0, a0
; GISEL-NEXT:    beq a0, a1, .LBB0_3
; GISEL-NEXT:  # %bb.1: # %entry
; GISEL-NEXT:    li a1, 5
; GISEL-NEXT:    bne a0, a1, .LBB0_4
; GISEL-NEXT:  # %bb.2: # %if.then
; GISEL-NEXT:    call bar
; GISEL-NEXT:    j .LBB0_4
; GISEL-NEXT:  .LBB0_3: # %if.then2
; GISEL-NEXT:    call bar
; GISEL-NEXT:  .LBB0_4: # %if.end3
; GISEL-NEXT:    call bar
; GISEL-NEXT:    ld ra, 8(sp) # 8-byte Folded Reload
; GISEL-NEXT:    addi sp, sp, 16
; GISEL-NEXT:    ret
entry:
  switch i32 %i, label %if.end3 [
    i32 5, label %if.then
    i32 7, label %if.then2
  ]

if.then:
  tail call void @bar() #0
  br label %if.end3

if.then2:
  tail call void @bar() #0
  br label %if.end3

if.end3:
  tail call void @bar() #0
  ret void
}

define void @foo_tail(i1 %i) nounwind {
; CHECK-LABEL: foo_tail:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    andi a0, a0, 1
; CHECK-NEXT:    beqz a0, .LBB1_2
; CHECK-NEXT:  # %bb.1: # %if.then
; CHECK-NEXT:    tail bar
; CHECK-NEXT:  .LBB1_2: # %if.else
; CHECK-NEXT:    tail bar
;
; GISEL-LABEL: foo_tail:
; GISEL:       # %bb.0: # %entry
; GISEL-NEXT:    addi sp, sp, -16
; GISEL-NEXT:    sd ra, 8(sp) # 8-byte Folded Spill
; GISEL-NEXT:    xori a0, a0, 1
; GISEL-NEXT:    andi a0, a0, 1
; GISEL-NEXT:    bnez a0, .LBB1_2
; GISEL-NEXT:  # %bb.1: # %if.then
; GISEL-NEXT:    call bar
; GISEL-NEXT:    j .LBB1_3
; GISEL-NEXT:  .LBB1_2: # %if.else
; GISEL-NEXT:    call bar
; GISEL-NEXT:  .LBB1_3: # %if.then
; GISEL-NEXT:    ld ra, 8(sp) # 8-byte Folded Reload
; GISEL-NEXT:    addi sp, sp, 16
; GISEL-NEXT:    ret
entry:
  br i1 %i, label %if.then, label %if.else

if.then:
  tail call void @bar() #0
  br label %if.end

if.else:
  tail call void @bar() #0
  br label %if.end

if.end:
  ret void
}

declare void @bar()

attributes #0 = { nomerge }