llvm/test/CodeGen/AArch64/GlobalISel/postlegalizercombiner-rotate.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64 -run-pass=aarch64-postlegalizer-combiner --aarch64postlegalizercombiner-only-enable-rule="rotate_out_of_range" -verify-machineinstrs %s -o - | FileCheck %s
# REQUIRES: asserts

# Check that we simplify the constant rotate amount to be in range.
---
name:            rotl
alignment:       4
legalized:       true
tracksRegLiveness: true
liveins:
  - { reg: '$w0' }
body:             |
  bb.1.entry:
    liveins: $w0

    ; CHECK-LABEL: name: rotl
    ; CHECK: liveins: $w0
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
    ; CHECK-NEXT: [[ROTL:%[0-9]+]]:_(s32) = G_ROTL [[COPY]], [[C]](s64)
    ; CHECK-NEXT: $w0 = COPY [[ROTL]](s32)
    ; CHECK-NEXT: RET_ReallyLR implicit $w0
    %0:_(s32) = COPY $w0
    %5:_(s64) = G_CONSTANT i64 -16
    %2:_(s32) = G_ROTL %0, %5(s64)
    $w0 = COPY %2(s32)
    RET_ReallyLR implicit $w0

...
---
name:            rotr
alignment:       4
legalized:       true
tracksRegLiveness: true
liveins:
  - { reg: '$w0' }
body:             |
  bb.1.entry:
    liveins: $w0

    ; CHECK-LABEL: name: rotr
    ; CHECK: liveins: $w0
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 16
    ; CHECK-NEXT: [[ROTR:%[0-9]+]]:_(s32) = G_ROTR [[COPY]], [[C]](s64)
    ; CHECK-NEXT: $w0 = COPY [[ROTR]](s32)
    ; CHECK-NEXT: RET_ReallyLR implicit $w0
    %0:_(s32) = COPY $w0
    %5:_(s64) = G_CONSTANT i64 -16
    %2:_(s32) = G_ROTR %0, %5(s64)
    $w0 = COPY %2(s32)
    RET_ReallyLR implicit $w0

...
---
name:            rotl_bitwidth_cst
alignment:       4
legalized:       true
tracksRegLiveness: true
liveins:
  - { reg: '$w0' }
body:             |
  bb.1.entry:
    liveins: $w0

    ; CHECK-LABEL: name: rotl_bitwidth_cst
    ; CHECK: liveins: $w0
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 0
    ; CHECK-NEXT: [[ROTL:%[0-9]+]]:_(s32) = G_ROTL [[COPY]], [[C]](s64)
    ; CHECK-NEXT: $w0 = COPY [[ROTL]](s32)
    ; CHECK-NEXT: RET_ReallyLR implicit $w0
    %0:_(s32) = COPY $w0
    %5:_(s64) = G_CONSTANT i64 32
    %2:_(s32) = G_ROTL %0, %5(s64)
    $w0 = COPY %2(s32)
    RET_ReallyLR implicit $w0

...
---
name:            rotl_bitwidth_minus_one_cst
alignment:       4
legalized:       true
tracksRegLiveness: true
liveins:
  - { reg: '$w0' }
body:             |
  bb.1.entry:
    liveins: $w0

    ; CHECK-LABEL: name: rotl_bitwidth_minus_one_cst
    ; CHECK: liveins: $w0
    ; CHECK-NEXT: {{  $}}
    ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s32) = COPY $w0
    ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 31
    ; CHECK-NEXT: [[ROTL:%[0-9]+]]:_(s32) = G_ROTL [[COPY]], [[C]](s64)
    ; CHECK-NEXT: $w0 = COPY [[ROTL]](s32)
    ; CHECK-NEXT: RET_ReallyLR implicit $w0
    %0:_(s32) = COPY $w0
    %5:_(s64) = G_CONSTANT i64 31
    %2:_(s32) = G_ROTL %0, %5(s64)
    $w0 = COPY %2(s32)
    RET_ReallyLR implicit $w0

...