test/CodeGen/Mips/delay-slot-filler-bundled-insts.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
## Check that the delay-slot filler does not attempt to split BUNDLE instructions
# RUN: llc %s -start-before=mips-delay-slot-filler -stop-after=mips-delay-slot-filler \
# RUN:   -verify-machineinstrs -o - | FileCheck %s
## Check that we can emit assembly for input with BUNDLE instructions:
# RUN: llc %s -start-before=mips-delay-slot-filler -verify-machineinstrs -o - | FileCheck %s -check-prefix ASM

# ASM:  # %bb.0:
# ASM-NEXT: daddiu	$sp, $sp, -16
# ASM-NEXT: sd	$ra, 8($sp)
## BUNDLE should be emitted in order:
# ASM-NEXT: daddiu	$sp, $sp, -16
# ASM-NEXT: daddiu	$sp, $sp, 16
# ASM-NEXT: beqz	$4, .LBB0_2
# ASM-NEXT: nop
--- |
  target datalayout = "E-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128"
  target triple = "mips64-unknown-freebsd"
  declare i8* @func_a(i64 zeroext)
  declare i8* @func_b(i64 zeroext)
  ; Function Attrs: nounwind
  define i8* @test(i64 zeroext %nbytes) local_unnamed_addr #0 {
  entry:
    %cmp = icmp eq i64 %nbytes, 0
    br i1 %cmp, label %if.else, label %if.then

  if.then:                                          ; preds = %entry
    %call = tail call i8* @func_a(i64 zeroext %nbytes)
    br label %return

  if.else:                                          ; preds = %entry
    %call1 = tail call i8* @func_b(i64 zeroext 0)
    br label %return

  return:                                           ; preds = %if.else, %if.then
    %retval.0 = phi i8* [ %call, %if.then ], [ %call1, %if.else ]
    ret i8* %retval.0
  }
  ; Function Attrs: nounwind
  declare void @llvm.stackprotector(i8*, i8**) #0

  attributes #0 = { nounwind }

...
---
name:            test
alignment:       8
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:
  - { reg: '$a0_64', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       16
  offsetAdjustment: 0
  maxAlignment:    8
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  0
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
      stack-id: default, callee-saved-register: '$ra_64', callee-saved-restored: true,
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
constants:       []
machineFunctionInfo: {}
body:             |
  ; CHECK-LABEL: name: test
  ; CHECK: bb.0.entry:
  ; CHECK:   successors: %bb.2(0x30000000), %bb.1(0x50000000)
  ; CHECK:   $sp_64 = DADDiu $sp_64, -16
  ; CHECK:   CFI_INSTRUCTION def_cfa_offset 16
  ; CHECK:   SD killed $ra_64, $sp_64, 8 :: (store 8 into %stack.0)
  ; CHECK:   CFI_INSTRUCTION offset $ra_64, -8
  ; CHECK:   BUNDLE {
  ; CHECK:     $sp_64 = DADDiu $sp_64, -16
  ; CHECK:     $sp_64 = DADDiu $sp_64, 16
  ; CHECK:   }
  ; CHECK:   BEQ64 renamable $a0_64, $zero_64, %bb.2, implicit-def $at {
  ; CHECK:     NOP
  ; CHECK:   }
  ; CHECK: bb.1.if.then:
  ; CHECK:   successors: %bb.3(0x80000000)
  ; CHECK:   JAL @func_a, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64 {
  ; CHECK:     NOP
  ; CHECK:   }
  ; CHECK:   J %bb.3, implicit-def dead $at {
  ; CHECK:     NOP
  ; CHECK:   }
  ; CHECK: bb.2.if.else:
  ; CHECK:   successors: %bb.3(0x80000000)
  ; CHECK:   JAL @func_b, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64 {
  ; CHECK:     $a0_64 = DADDiu $zero_64, 0
  ; CHECK:   }
  ; CHECK: bb.3.return:
  ; CHECK:   $ra_64 = LD $sp_64, 8 :: (load 8 from %stack.0)
  ; CHECK:   PseudoReturn64 undef $ra_64, implicit $v0_64 {
  ; CHECK:     $sp_64 = DADDiu $sp_64, 16
  ; CHECK:   }
  bb.0.entry:
    successors: %bb.2(0x30000000), %bb.1(0x50000000)
    liveins: $a0_64, $ra_64

    $sp_64 = DADDiu $sp_64, -16
    CFI_INSTRUCTION def_cfa_offset 16
    SD killed $ra_64, $sp_64, 8 :: (store 8 into %stack.0)
    CFI_INSTRUCTION offset $ra_64, -8
    ; This BUNDLE instruction must not be split by the delay slot filler:
    BUNDLE {
      $sp_64 = DADDiu $sp_64, -16
      $sp_64 = DADDiu $sp_64, 16
    }
    BEQ64 renamable $a0_64, $zero_64, %bb.2, implicit-def $at

  bb.1.if.then:
    successors: %bb.3(0x80000000)
    liveins: $a0_64

    JAL @func_a, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64
    J %bb.3, implicit-def dead $at

  bb.2.if.else:
    successors: %bb.3(0x80000000)

    $a0_64 = DADDiu $zero_64, 0
    JAL @func_b, csr_n64, implicit-def dead $ra, implicit $a0_64, implicit-def $sp, implicit-def $v0_64

  bb.3.return:
    liveins: $v0_64

    $ra_64 = LD $sp_64, 8 :: (load 8 from %stack.0)
    $sp_64 = DADDiu $sp_64, 16
    PseudoReturn64 undef $ra_64, implicit $v0_64

...