# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# 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:            dont_fold_sub
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; Not an identity, no folding.
    ; CHECK-LABEL: name: dont_fold_sub
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 -1
    ; CHECK-NEXT: %op:_(s32) = G_ADD %x, [[C]]
    ; CHECK-NEXT: $eax = COPY %op(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 1
    %op:_(s32) = G_SUB %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            sub_to_add
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; CHECK-LABEL: name: sub_to_add
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 -1
    ; CHECK-NEXT: %op:_(s32) = G_ADD %x, [[C]]
    ; CHECK-NEXT: $eax = COPY %op(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 1
    %op:_(s32) = G_SUB %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:            sub_to_add_nuw
tracksRegLiveness: true
body:             |
  bb.1.entry:
    liveins: $eax
    ; CHECK-LABEL: name: sub_to_add_nuw
    ; CHECK: liveins: $eax
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %x:_(s32) = COPY $eax
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 -1
    ; CHECK-NEXT: %op:_(s32) = G_ADD %x, [[C]]
    ; CHECK-NEXT: $eax = COPY %op(s32)
    ; CHECK-NEXT: RET implicit $eax
    %x:_(s32) = COPY $eax
    %cst:_(s32) = G_CONSTANT i32 1
    %op:_(s32) = nuw G_SUB %x(s32), %cst
    $eax = COPY %op(s32)
    RET implicit $eax
...
---
name:   sub_to_add_nsw_128
body:             |
  bb.0:
    liveins: $eax, $ebx

    ; CHECK-LABEL: name: sub_to_add_nsw_128
    ; CHECK: liveins: $eax, $ebx
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %a:_(s32) = COPY $eax
    ; CHECK-NEXT: %b:_(s8) = G_TRUNC %a(s32)
    ; CHECK-NEXT: %c:_(s8) = G_CONSTANT i8 -128
    ; CHECK-NEXT: %add:_(s8) = G_ADD %b, %c
    ; CHECK-NEXT: %d:_(s32) = G_ZEXT %add(s8)
    ; CHECK-NEXT: $eax = COPY %d(s32)
    ; CHECK-NEXT: RET implicit $rax
    %a:_(s32) = COPY $eax
    %b:_(s8) = G_TRUNC %a
    %c:_(s8) = G_CONSTANT i8 -128
    %add:_(s8) = nsw nuw G_SUB %b, %c
    %d:_(s32) = G_ZEXT %add
    $eax = COPY %d
    RET implicit $rax
...
---
name:   sub_to_add_nsw_intmin
body:             |
  bb.0:
    liveins: $eax, $ebx

    ; CHECK-LABEL: name: sub_to_add_nsw_intmin
    ; CHECK: liveins: $eax, $ebx
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: %a:_(s32) = COPY $eax
    ; CHECK-NEXT: %c:_(s32) = G_CONSTANT i32 -2147483648
    ; CHECK-NEXT: %add:_(s32) = G_ADD %a, %c
    ; CHECK-NEXT: $eax = COPY %add(s32)
    ; CHECK-NEXT: RET implicit $rax
    %a:_(s32) = COPY $eax
    %c:_(s32) = G_CONSTANT i32 -2147483648
    %add:_(s32) = nsw nuw G_SUB %a, %c
    $eax = COPY %add
    RET implicit $rax
...