# RUN: llc -mtriple x86_64 -run-pass=x86-prelegalizer-combiner %s -o - | FileCheck %s
# RUN: llc -mtriple x86_64 -passes=x86-prelegalizer-combiner-pass %s -o - | FileCheck %s

---
name:            right_ident_sub
tracksRegLiveness: true
body:             |
  bb.0.entry:
    liveins: $eax
    ; Fold (x - 0) -> x
    ; CHECK-LABEL: name: right_ident_sub
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_SUB %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax

...
---
name:            right_ident_add
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Fold (x + 0) -> x
    ; CHECK-LABEL: name: right_ident_add
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_ADD %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...

---
name:            right_ident_or
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Fold (x || 0) -> x
    ; CHECK-LABEL: name: right_ident_or
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_OR %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            right_ident_xor
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Fold (x | 0) -> x
    ; CHECK-LABEL: name: right_ident_xor
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_XOR %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            right_ident_shl
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Fold (x << 0) -> x
    ; CHECK-LABEL: name: right_ident_shl
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_SHL %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            right_ident_ashr
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Fold (x ashr 0) -> x
    ; CHECK-LABEL: name: right_ident_ashr
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_ASHR %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            right_ident_lshr
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Fold (x lshr 0) -> x
    ; CHECK-LABEL: name: right_ident_lshr
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %x(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 0
    %op:_(s32) = G_LSHR %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            right_ident_ptr_add
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $rax
    ; Fold (x + 0) -> x
    ; CHECK-LABEL: name: right_ident_ptr_add
    ; CHECK: liveins: $rax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(p0) = COPY $rax
    ; CHECK-NEXT: $rax = COPY %x(p0)
    ; CHECK-NEXT: RET implicit $rax
    %x:_(p0) = COPY $rax
    %cst:_(s64) = G_CONSTANT i64 0
    %op:_(p0) = G_PTR_ADD %x(p0), %cst
    $rax = COPY %op(p0)
    RET implicit $rax
...
---
name:            right_identity_rotl
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $eax, $ebx
    ; CHECK-LABEL: name: right_identity_rotl
    ; CHECK: liveins: $eax, $ebx
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %copy:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %copy(s32)
    ; CHECK-NEXT: RET implicit $eax
    %copy:_(s32) = COPY $eax
    %zero:_(s32) = G_CONSTANT i32 0
    %rot:_(s32) = G_ROTL %copy(s32), %zero(s32)
    $eax = COPY %rot(s32)
    RET implicit $eax
...
---
name:            right_identity_rotr
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $eax, $ebx
    ; CHECK-LABEL: name: right_identity_rotr
    ; CHECK: liveins: $eax, $ebx
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %copy:_(s32) = COPY $eax
    ; CHECK-NEXT: $eax = COPY %copy(s32)
    ; CHECK-NEXT: RET implicit $eax
    %copy:_(s32) = COPY $eax
    %zero:_(s32) = G_CONSTANT i32 0
    %rot:_(s32) = G_ROTR %copy(s32), %zero(s32)
    $eax = COPY %rot(s32)
    RET implicit $eax
...