test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-binop-same-val.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64 -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs %s -o - | FileCheck %s

name:            or_same
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $x0

    ; Fold: x or x -> x
    ; CHECK-LABEL: name: or_same
    ; CHECK: liveins: $x0
    ; CHECK: %copy:_(s64) = COPY $x0
    ; CHECK: $x0 = COPY %copy(s64)
    ; CHECK: RET_ReallyLR implicit $x0
    %copy:_(s64) = COPY $x0
    %or:_(s64) = G_OR %copy, %copy
    $x0 = COPY %or(s64)
    RET_ReallyLR implicit $x0

...
---
name:            and_same
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $x0

    ; Fold: x and x -> x

    ; CHECK-LABEL: name: and_same
    ; CHECK: liveins: $x0
    ; CHECK: %copy:_(s64) = COPY $x0
    ; CHECK: $x0 = COPY %copy(s64)
    ; CHECK: RET_ReallyLR implicit $x0
    %copy:_(s64) = COPY $x0
    %and:_(s64) = G_AND %copy, %copy
    $x0 = COPY %and(s64)
    RET_ReallyLR implicit $x0

...
---
name:            and_same2
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $x0, $x1

    ; We can fold when the LHS and RHS are guaranteed to be identical.

    ; CHECK-LABEL: name: and_same2
    ; CHECK: liveins: $x0, $x1
    ; CHECK: %copy1:_(s64) = COPY $x0
    ; CHECK: %copy2:_(s64) = COPY $x1
    ; CHECK: %or:_(s64) = G_OR %copy1, %copy2
    ; CHECK: $x0 = COPY %or(s64)
    ; CHECK: RET_ReallyLR implicit $x0
    %copy1:_(s64) = COPY $x0
    %copy2:_(s64) = COPY $x1
    %or:_(s64) = G_OR %copy1, %copy2
    %same_as_or:_(s64) = COPY %or(s64)
    %and:_(s64) = G_AND %or, %same_as_or
    $x0 = COPY %and(s64)
    RET_ReallyLR implicit $x0

...
---
name:            or_and_not_same
tracksRegLiveness: true
body:             |
  bb.0:
    liveins: $x0, $x1, $x2

    ; None of the G_ORs or G_ANDs should be eliminated here, because their LHS
    ; and RHS values are different.

    ; CHECK-LABEL: name: or_and_not_same
    ; CHECK: liveins: $x0, $x1, $x2
    ; CHECK: %copy1:_(s64) = COPY $x0
    ; CHECK: %copy2:_(s64) = COPY $x1
    ; CHECK: %copy3:_(s64) = COPY $x2
    ; CHECK: %or1:_(s64) = G_OR %copy1, %copy2
    ; CHECK: %or2:_(s64) = G_OR %copy1, %copy3
    ; CHECK: %and:_(s64) = G_AND %or1, %or2
    ; CHECK: $x0 = COPY %and(s64)
    ; CHECK: RET_ReallyLR implicit $x0
    %copy1:_(s64) = COPY $x0
    %copy2:_(s64) = COPY $x1
    %copy3:_(s64) = COPY $x2
    %or1:_(s64) = G_OR %copy1, %copy2
    %or2:_(s64) = G_OR %copy1, %copy3
    %and:_(s64) = G_AND %or1, %or2
    $x0 = COPY %and(s64)
    RET_ReallyLR implicit $x0

...