test/CodeGen/ARM/GlobalISel/arm-legalize-cmp.mir

# RUN: llc -mtriple arm-- -run-pass=legalizer %s -o - | FileCheck %s
# RUN: llc -mtriple thumb-- -mattr=+v6t2 -run-pass=legalizer %s -o - | FileCheck %s
--- |
  define void @test_icmp_s8() { ret void }
  define void @test_icmp_s16() { ret void }
  define void @test_icmp_s32() { ret void }

  define void @test_icmp_p0() { ret void }
...
---
name:            test_icmp_s8
# CHECK-LABEL: name: test_icmp_s8
legalized:       false
# CHECK: legalized: true
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
  - { id: 4, class: _ }
  - { id: 5, class: _ }
body:             |
  bb.0:
    liveins: $r0, $r1

    %0(p0) = COPY $r0
    %1(s8) = G_LOAD %0 :: (load 1)
    %2(p0) = COPY $r1
    %3(s8) = G_LOAD %2 :: (load 1)
    %4(s1) = G_ICMP intpred(ne), %1(s8), %3
    ; G_ICMP with s8 should widen
    ; CHECK: {{%[0-9]+}}:_(s1) = G_ICMP intpred(ne), {{%[0-9]+}}(s32), {{%[0-9]+}}
    ; CHECK-NOT: {{%[0-9]+}}:_(s1) = G_ICMP intpred(ne), {{%[0-9]+}}(s8), {{%[0-9]+}}
    %5(s32) = G_ZEXT %4(s1)
    $r0 = COPY %5(s32)
    BX_RET 14, $noreg, implicit $r0
...
---
name:            test_icmp_s16
# CHECK-LABEL: name: test_icmp_s16
legalized:       false
# CHECK: legalized: true
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
  - { id: 4, class: _ }
  - { id: 5, class: _ }
body:             |
  bb.0:
    liveins: $r0, $r1

    %0(p0) = COPY $r0
    %1(s16) = G_LOAD %0 :: (load 2)
    %2(p0) = COPY $r1
    %3(s16) = G_LOAD %2 :: (load 2)
    %4(s1) = G_ICMP intpred(slt), %1(s16), %3
    ; G_ICMP with s16 should widen
    ; CHECK: {{%[0-9]+}}:_(s1) = G_ICMP intpred(slt), {{%[0-9]+}}(s32), {{%[0-9]+}}
    ; CHECK-NOT: {{%[0-9]+}}:_(s1) = G_ICMP intpred(slt), {{%[0-9]+}}(s16), {{%[0-9]+}}
    %5(s32) = G_ZEXT %4(s1)
    $r0 = COPY %5(s32)
    BX_RET 14, $noreg, implicit $r0
...
---
name:            test_icmp_s32
# CHECK-LABEL: name: test_icmp_s32
legalized:       false
# CHECK: legalized: true
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
body:             |
  bb.0:
    liveins: $r0, $r1

    %0(s32) = COPY $r0
    %1(s32) = COPY $r1
    %2(s1) = G_ICMP intpred(eq), %0(s32), %1
    ; G_ICMP with s32 is legal, so we should find it unchanged in the output
    ; CHECK: {{%[0-9]+}}:_(s1) = G_ICMP intpred(eq), {{%[0-9]+}}(s32), {{%[0-9]+}}
    %3(s32) = G_ZEXT %2(s1)
    $r0 = COPY %3(s32)
    BX_RET 14, $noreg, implicit $r0
...
---
name:            test_icmp_p0
# CHECK-LABEL: name: test_icmp_p0
legalized:       false
# CHECK: legalized: true
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
body:             |
  bb.0:
    liveins: $r0, $r1

    %0(p0) = COPY $r0
    %1(p0) = COPY $r1
    %2(s1) = G_ICMP intpred(eq), %0(p0), %1
    ; G_ICMP with p0 is legal, so we should find it unchanged in the output
    ; CHECK: {{%[0-9]+}}:_(s1) = G_ICMP intpred(eq), {{%[0-9]+}}(p0), {{%[0-9]+}}
    %3(s32) = G_ZEXT %2(s1)
    $r0 = COPY %3(s32)
    BX_RET 14, $noreg, implicit $r0
...