llvm/test/CodeGen/LoongArch/spill-ra-without-kill.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -O0 --mtriple=loongarch64 -mattr=+d --verify-machineinstrs < %s | FileCheck %s

;; This test case is reduced from pr17377.c of the GCC C Torture Suite using
;; bugpoint.

@calls = external dso_local global i32, align 4
declare ptr @llvm.returnaddress(i32 immarg)

define dso_local ptr @f(i32 noundef signext %i) "frame-pointer"="all" {
; CHECK-LABEL: f:
; CHECK:       # %bb.0: # %entry
; CHECK-NEXT:    addi.d $sp, $sp, -48
; CHECK-NEXT:    .cfi_def_cfa_offset 48
; CHECK-NEXT:    st.d $ra, $sp, 40 # 8-byte Folded Spill
; CHECK-NEXT:    st.d $fp, $sp, 32 # 8-byte Folded Spill
; CHECK-NEXT:    .cfi_offset 1, -8
; CHECK-NEXT:    .cfi_offset 22, -16
; CHECK-NEXT:    addi.d $fp, $sp, 48
; CHECK-NEXT:    .cfi_def_cfa 22, 0
; CHECK-NEXT:    st.d $ra, $fp, -40 # 8-byte Folded Spill
; CHECK-NEXT:    # kill: def $r5 killed $r4
; CHECK-NEXT:    st.w $a0, $fp, -28
; CHECK-NEXT:    pcalau12i $a0, %pc_hi20(calls)
; CHECK-NEXT:    addi.d $a2, $a0, %pc_lo12(calls)
; CHECK-NEXT:    ld.w $a0, $a2, 0
; CHECK-NEXT:    addi.d $a1, $a0, 1
; CHECK-NEXT:    st.w $a1, $a2, 0
; CHECK-NEXT:    bnez $a0, .LBB0_2
; CHECK-NEXT:    b .LBB0_1
; CHECK-NEXT:  .LBB0_1: # %if.then
; CHECK-NEXT:    ld.d $a0, $fp, -40 # 8-byte Folded Reload
; CHECK-NEXT:    st.d $a0, $fp, -24
; CHECK-NEXT:    b .LBB0_7
; CHECK-NEXT:  .LBB0_2: # %if.end
; CHECK-NEXT:    ld.w $a0, $fp, -28
; CHECK-NEXT:    st.d $a0, $fp, -48 # 8-byte Folded Spill
; CHECK-NEXT:    beqz $a0, .LBB0_5
; CHECK-NEXT:    b .LBB0_3
; CHECK-NEXT:  .LBB0_3: # %if.end
; CHECK-NEXT:    ld.d $a0, $fp, -48 # 8-byte Folded Reload
; CHECK-NEXT:    addi.w $a0, $a0, 0
; CHECK-NEXT:    ori $a1, $zero, 1
; CHECK-NEXT:    bne $a0, $a1, .LBB0_6
; CHECK-NEXT:    b .LBB0_4
; CHECK-NEXT:  .LBB0_4: # %sw.bb
; CHECK-NEXT:    pcalau12i $a0, %pc_hi20(f)
; CHECK-NEXT:    addi.d $a0, $a0, %pc_lo12(f)
; CHECK-NEXT:    st.d $a0, $fp, -24
; CHECK-NEXT:    b .LBB0_7
; CHECK-NEXT:  .LBB0_5: # %sw.bb1
; CHECK-NEXT:    ld.d $a0, $fp, -40 # 8-byte Folded Reload
; CHECK-NEXT:    st.d $a0, $fp, -24
; CHECK-NEXT:    b .LBB0_7
; CHECK-NEXT:  .LBB0_6: # %sw.epilog
; CHECK-NEXT:    move $a0, $zero
; CHECK-NEXT:    st.d $a0, $fp, -24
; CHECK-NEXT:    b .LBB0_7
; CHECK-NEXT:  .LBB0_7: # %return
; CHECK-NEXT:    ld.d $a0, $fp, -24
; CHECK-NEXT:    ld.d $fp, $sp, 32 # 8-byte Folded Reload
; CHECK-NEXT:    ld.d $ra, $sp, 40 # 8-byte Folded Reload
; CHECK-NEXT:    addi.d $sp, $sp, 48
; CHECK-NEXT:    ret
entry:
  %retval = alloca ptr, align 8
  %i.addr = alloca i32, align 4
  store i32 %i, ptr %i.addr, align 4
  %0 = load i32, ptr @calls, align 4
  %inc = add nsw i32 %0, 1
  store i32 %inc, ptr @calls, align 4
  %cmp = icmp eq i32 %0, 0
  br i1 %cmp, label %if.then, label %if.end

if.then:
  %1 = call ptr @llvm.returnaddress(i32 0)
  store ptr %1, ptr %retval, align 8
  br label %return

if.end:
  %2 = load i32, ptr %i.addr, align 4
  switch i32 %2, label %sw.epilog [
    i32 1, label %sw.bb
    i32 0, label %sw.bb1
  ]

sw.bb:
  store ptr @f, ptr %retval, align 8
  br label %return

sw.bb1:
  %3 = call ptr @llvm.returnaddress(i32 0)
  store ptr %3, ptr %retval, align 8
  br label %return

sw.epilog:
  store ptr null, ptr %retval, align 8
  br label %return

return:
  %4 = load ptr, ptr %retval, align 8
  ret ptr %4
}