test/CodeGen/AArch64/GlobalISel/postlegalizer-combiner-redundant-sextinreg.mir

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

...
---
name:            sextload
legalized:       true
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x0

    ; CHECK-LABEL: name: sextload
    ; CHECK: liveins: $x0
    ; CHECK: %x0:_(p0) = COPY $x0
    ; CHECK: %sextload:_(s32) = G_SEXTLOAD %x0(p0) :: (load 2)
    ; CHECK: $w0 = COPY %sextload(s32)
    %x0:_(p0) = COPY $x0
    %sextload:_(s32) = G_SEXTLOAD %x0:_(p0) :: (load 2)
    %sext_inreg:_(s32) = G_SEXT_INREG %sextload:_(s32), 24
    $w0 = COPY %sext_inreg(s32)
...
---
name:            assert_sext
legalized:       true
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $w0
    ; The G_ASSERT_SEXT says we already sign extended from 24 bits, so the
    ; G_SEXT_INREG is not necessary.

    ; CHECK-LABEL: name: assert_sext
    ; CHECK: liveins: $w0
    ; CHECK: %w0:_(s32) = COPY $w0
    ; CHECK: %assert_sext:_(s32) = G_ASSERT_SEXT %w0, 24
    ; CHECK: $w0 = COPY %assert_sext(s32)
    %w0:_(s32) = COPY $w0
    %assert_sext:_(s32) = G_ASSERT_SEXT %w0, 24
    %sext_inreg:_(s32) = G_SEXT_INREG %assert_sext:_(s32), 24
    $w0 = COPY %sext_inreg(s32)
...
---
name:            assert_sext_greater_width
legalized:       true
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $w0
    ; The G_ASSERT_SEXT is from a wider width than the G_SEXT_INREG, so we
    ; can't eliminate it.

    ; CHECK-LABEL: name: assert_sext_greater_width
    ; CHECK: liveins: $w0
    ; CHECK: %w0:_(s32) = COPY $w0
    ; CHECK: %assert_sext:_(s32) = G_ASSERT_SEXT %w0, 24
    ; CHECK: %sext_inreg:_(s32) = G_SEXT_INREG %assert_sext, 12
    ; CHECK: $w0 = COPY %sext_inreg(s32)
    %w0:_(s32) = COPY $w0
    %assert_sext:_(s32) = G_ASSERT_SEXT %w0, 24
    %sext_inreg:_(s32) = G_SEXT_INREG %assert_sext:_(s32), 12
    $w0 = COPY %sext_inreg(s32)
...
---
name:            assert_sext_smaller_width
legalized:       true
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $w0
    ; The G_ASSERT_SEXT is from a smaller width, so the G_SEXT_INREG is not
    ; necessary.

    ; CHECK-LABEL: name: assert_sext_smaller_width
    ; CHECK: liveins: $w0
    ; CHECK: %w0:_(s32) = COPY $w0
    ; CHECK: %assert_sext:_(s32) = G_ASSERT_SEXT %w0, 8
    ; CHECK: $w0 = COPY %assert_sext(s32)
    %w0:_(s32) = COPY $w0
    %assert_sext:_(s32) = G_ASSERT_SEXT %w0, 8
    %sext_inreg:_(s32) = G_SEXT_INREG %assert_sext:_(s32), 12
    $w0 = COPY %sext_inreg(s32)
...