llvm/test/CodeGen/RISCV/rvv/undef-earlyclobber-chain.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=riscv32 -mattr=+v -enable-subreg-liveness -run-pass init-undef -run-pass machineverifier %s -o - | FileCheck %s
# RUN: llc -mtriple=riscv32 -mattr=+v -enable-subreg-liveness -passes=init-undef,verify %s -o - | FileCheck %s

--- |
  source_filename = "<stdin>"
  target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
  target triple = "riscv64"

  define <vscale x 2 x float> @undef_early_clobber_chain(ptr %p) #0 {
  entry:
    %0 = tail call <vscale x 2 x float> @llvm.riscv.vrgather.vx.nxv2f32.i64(<vscale x 2 x float> undef, <vscale x 2 x float> undef, i64 0, i64 0)
    ret <vscale x 2 x float> %0
  }

  declare <vscale x 2 x float> @llvm.riscv.vrgather.vx.nxv2f32.i64(<vscale x 2 x float>, <vscale x 2 x float>, i64, i64) #1

  attributes #0 = { "target-features"="+v" }
  attributes #1 = { nocallback nofree nosync nounwind willreturn memory(none) "target-features"="+v" }

...
---
name:            undef_early_clobber_chain
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
callsEHReturn:   false
callsUnwindInit: false
hasEHContTarget: false
hasEHScopes:     false
hasEHFunclets:   false
isOutlined:      false
debugInstrRef:   false
failsVerification: false
tracksDebugUserValues: false
registers:
  - { id: 0, class: gpr, preferred-register: '' }
  - { id: 1, class: vr, preferred-register: '' }
  - { id: 2, class: vr, preferred-register: '' }
  - { id: 3, class: vr, preferred-register: '' }
liveins:         []
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    1
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  functionContext: ''
  maxCallFrameSize: 4294967295
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  hasTailCall:     false
  localFrameSize:  0
  savePoint:       []
  restorePoint:    []
fixedStack:      []
stack:           []
entry_values:    []
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo:
  varArgsFrameIndex: 0
  varArgsSaveSize: 0
body:             |
  bb.0.entry:
    ; CHECK-LABEL: name: undef_early_clobber_chain
    ; CHECK: [[DEF:%[0-9]+]]:vr = IMPLICIT_DEF
    ; CHECK-NEXT: dead $x0 = PseudoVSETIVLI 0, 208 /* e32, m1, ta, ma */, implicit-def $vl, implicit-def $vtype
    ; CHECK-NEXT: [[INIT_UNDEF:%[0-9]+]]:vr = INIT_UNDEF
    ; CHECK-NEXT: early-clobber %1:vr = PseudoVRGATHER_VI_M1 undef [[DEF]], [[INIT_UNDEF]], 0, 0, 5 /* e32 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
    ; CHECK-NEXT: $v8 = COPY %1
    ; CHECK-NEXT: PseudoRET implicit $v8
    %2:vr = IMPLICIT_DEF
    dead $x0 = PseudoVSETIVLI 0, 208 /* e32, m1, ta, ma */, implicit-def $vl, implicit-def $vtype
    early-clobber %1:vr = PseudoVRGATHER_VI_M1 undef %2, undef %2, 0, 0, 5 /* e32 */, 0 /* tu, mu */, implicit $vl, implicit $vtype
    $v8 = COPY %1
    PseudoRET implicit $v8

...