test/CodeGen/RISCV/live-sp.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -march=riscv64 -run-pass=prologepilog -simplify-mir  -o - %s | FileCheck %s
# verify live-on-entry registers are not marked killed by spills
--- |

  declare void @vararg(i32 signext, ...)

  define void @test1() {
  entry:
    %a = alloca i32, align 4
    %0 = call i8* @llvm.returnaddress(i32 0)
    %1 = ptrtoint i8* %0 to i64
    %conv = trunc i64 %1 to i32
    store i32 %conv, i32* %a, align 4
    %2 = load i32, i32* %a, align 4
    call void (i32, ...) @vararg(i32 signext 0, i32 signext %2)
    ret void
  }

  ; Function Attrs: nofree nosync nounwind readnone willreturn
  declare i8* @llvm.returnaddress(i32 immarg) #0

  attributes #0 = { nofree nosync nounwind readnone willreturn }

...
---
name:            test1
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:
  - { reg: '$x1', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: true
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    4
  adjustsStack:    false
  hasCalls:        true
  stackProtector:  ''
  maxCallFrameSize: 4294967295
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  hasTailCall:     false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: a, type: default, offset: 0, size: 4, alignment: 4,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo: {}
body:             |
  bb.0.entry:
    liveins: $x1

    ; CHECK-LABEL: name: test1
    ; CHECK: liveins: $x1
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: $x2 = frame-setup ADDI $x2, -16
    ; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 16
    ; CHECK-NEXT: SD $x1, $x2, 8 :: (store (s64) into %stack.1)
    ; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $x1, -8
    ; CHECK-NEXT: SW renamable $x1, $x2, 4 :: (store (s32) into %ir.a)
    ; CHECK-NEXT: renamable $x11 = ADDIW killed renamable $x1, 0
    ; CHECK-NEXT: $x10 = COPY $x0
    ; CHECK-NEXT: PseudoCALL target-flags(riscv-plt) @vararg, csr_ilp32_lp64, implicit-def dead $x1, implicit killed $x10, implicit $x11, implicit-def $x2
    ; CHECK-NEXT: $x1 = LD $x2, 8 :: (load (s64) from %stack.1)
    ; CHECK-NEXT: $x2 = frame-destroy ADDI $x2, 16
    ; CHECK-NEXT: PseudoRET
    SW renamable $x1, %stack.0.a, 0 :: (store (s32) into %ir.a)
    renamable $x11 = ADDIW killed renamable $x1, 0
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $x2, implicit $x2
    $x10 = COPY $x0
    PseudoCALL target-flags(riscv-plt) @vararg, csr_ilp32_lp64, implicit-def dead $x1, implicit killed $x10, implicit $x11, implicit-def $x2
    ADJCALLSTACKUP 0, 0, implicit-def dead $x2, implicit $x2
    PseudoRET

...