llvm/test/CodeGen/X86/distancemap.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc %s -o - -mtriple=x86_64-unknown-linux -run-pass=twoaddressinstruction -verify-machineinstrs | FileCheck %s

# In TwoAddressInstructionPass, new instructions should be added to DistanceMap.
# In this case, function convertInstTo3Addr is called on the first ADD
# instruction, extra COPY instructions are generated. If they are not added to
# DistanceMap, function noUseAfterLastDef computes a wrong value for the later
# ADD instruction, and a different commute decision is made.

--- |
  ; ModuleID = 't.ll'
  source_filename = "t.ll"
  target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
  target triple = "x86_64-unknown-linux"

  declare i16 @llvm.sadd.sat.i16(i16, i16)

  define signext i16 @func16(i16 signext %x, i16 signext %y, i16 signext %z) nounwind {
    %a = mul i16 %y, %z
    %tmp = call i16 @llvm.sadd.sat.i16(i16 %x, i16 %a)
    ret i16 %tmp
  }

...
---
name:            func16
alignment:       16
tracksRegLiveness: true
registers:
  - { id: 0, class: gr32 }
  - { id: 1, class: gr32 }
  - { id: 2, class: gr32 }
  - { id: 3, class: gr16 }
  - { id: 4, class: gr32 }
  - { id: 5, class: gr16 }
  - { id: 6, class: gr16 }
  - { id: 7, class: gr32 }
  - { id: 8, class: gr32 }
  - { id: 9, class: gr32 }
  - { id: 10, class: gr16 }
  - { id: 11, class: gr32 }
  - { id: 13, class: gr32 }
  - { id: 14, class: gr16 }
frameInfo:
  maxAlignment:    1
body:             |
  bb.0 :
    liveins: $edi, $esi, $edx
    ; CHECK-LABEL: name: func16
    ; CHECK: liveins: $edi, $esi, $edx
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:gr32 = COPY killed $edx
    ; CHECK-NEXT: [[COPY1:%[0-9]+]]:gr32 = COPY killed $esi
    ; CHECK-NEXT: [[COPY2:%[0-9]+]]:gr32 = COPY killed $edi
    ; CHECK-NEXT: [[COPY3:%[0-9]+]]:gr16 = COPY killed [[COPY2]].sub_16bit
    ; CHECK-NEXT: [[COPY4:%[0-9]+]]:gr32 = COPY [[COPY1]]
    ; CHECK-NEXT: [[IMUL32rr:%[0-9]+]]:gr32 = IMUL32rr [[IMUL32rr]], killed [[COPY]], implicit-def dead $eflags
    ; CHECK-NEXT: [[COPY4:%[0-9]+]]:gr16 = COPY killed [[IMUL32rr]].sub_16bit
    ; CHECK-NEXT: [[DEF:%[0-9]+]]:gr64_nosp = IMPLICIT_DEF
    ; CHECK-NEXT: [[DEF]].sub_16bit:gr64_nosp = COPY [[COPY3]]
    ; CHECK-NEXT: [[DEF1:%[0-9]+]]:gr64_nosp = IMPLICIT_DEF
    ; CHECK-NEXT: [[DEF1]].sub_16bit:gr64_nosp = COPY [[COPY4]]
    ; CHECK-NEXT: [[LEA64_32r:%[0-9]+]]:gr32 = LEA64_32r killed [[DEF]], 1, killed [[DEF1]], 0, $noreg
    ; CHECK-NEXT: [[COPY5:%[0-9]+]]:gr16 = COPY killed [[LEA64_32r]].sub_16bit
    ; CHECK-NEXT: [[MOVSX32rr16_:%[0-9]+]]:gr32 = MOVSX32rr16 killed [[COPY5]]
    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr32 = COPY [[MOVSX32rr16_]]
    ; CHECK-NEXT: [[SAR32ri:%[0-9]+]]:gr32 = SAR32ri [[SAR32ri]], 15, implicit-def dead $eflags
    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr32 = COPY [[SAR32ri]]
    ; CHECK-NEXT: [[XOR32ri:%[0-9]+]]:gr32 = XOR32ri [[XOR32ri]], -32768, implicit-def dead $eflags
    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr16 = COPY [[COPY3]]
    ; CHECK-NEXT: [[ADD16rr:%[0-9]+]]:gr16 = ADD16rr [[ADD16rr]], killed [[COPY4]], implicit-def $eflags
    ; CHECK-NEXT: undef %11.sub_16bit:gr32 = COPY killed [[ADD16rr]]
    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr32 = COPY [[XOR32ri]]
    ; CHECK-NEXT: [[CMOV32rr:%[0-9]+]]:gr32 = CMOV32rr [[CMOV32rr]], killed %11, 1, implicit killed $eflags
    ; CHECK-NEXT: [[COPY6:%[0-9]+]]:gr16 = COPY killed [[CMOV32rr]].sub_16bit
    ; CHECK-NEXT: $ax = COPY killed [[COPY6]]
    ; CHECK-NEXT: RET 0, killed $ax
    %2:gr32 = COPY killed $edx
    %1:gr32 = COPY killed $esi
    %0:gr32 = COPY killed $edi
    %3:gr16 = COPY killed %0.sub_16bit:gr32
    %4:gr32 = IMUL32rr killed %1:gr32, killed %2:gr32, implicit-def dead $eflags
    %5:gr16 = COPY killed %4.sub_16bit:gr32
    %6:gr16 = ADD16rr %3:gr16, %5:gr16, implicit-def dead $eflags
    %7:gr32 = MOVSX32rr16 killed %6:gr16
    %8:gr32 = SAR32ri killed %7:gr32, 15, implicit-def dead $eflags
    %9:gr32 = XOR32ri killed %8:gr32, -32768, implicit-def dead $eflags
    %10:gr16 = ADD16rr killed %3:gr16, killed %5:gr16, implicit-def $eflags
    %11:gr32 = INSERT_SUBREG undef %12:gr32, killed %10:gr16, %subreg.sub_16bit
    %13:gr32 = CMOV32rr killed %11:gr32, killed %9:gr32, 0, implicit killed $eflags
    %14:gr16 = COPY killed %13.sub_16bit:gr32
    $ax = COPY killed %14:gr16
    RET 0, killed $ax

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