llvm-project/llvm/test/CodeGen/X86/GlobalISel/select-trunc.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=x86_64-linux-gnu -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s --check-prefix=CHECK
--- |
  define i1 @trunc_i32toi1(i32 %a) {
    %r = trunc i32 %a to i1
    ret i1 %r
  }

  define i8 @trunc_i32toi8(i32 %a) {
    %r = trunc i32 %a to i8
    ret i8 %r
  }

  define i16 @trunc_i32toi16(i32 %a) {
    %r = trunc i32 %a to i16
    ret i16 %r
  }

  define i8 @trunc_i64toi8(i64 %a) {
    %r = trunc i64 %a to i8
    ret i8 %r
  }

  define i16 @trunc_i64toi16(i64 %a) {
    %r = trunc i64 %a to i16
    ret i16 %r
  }

  define i32 @trunc_i64toi32(i64 %a) {
    %r = trunc i64 %a to i32
    ret i32 %r
  }

...
---
name:            trunc_i32toi1
alignment:       16
legalized:       true
regBankSelected: true
registers:
  - { id: 0, class: gpr }
  - { id: 1, class: gpr }
  - { id: 2, class: gpr }
body:             |
  bb.1 (%ir-block.0):
    liveins: $edi

    ; CHECK-LABEL: name: trunc_i32toi1
    ; CHECK: [[COPY:%[0-9]+]]:gr32 = COPY $edi
    ; CHECK: [[COPY1:%[0-9]+]]:gr8 = COPY [[COPY]].sub_8bit
    ; CHECK: $al = COPY [[COPY1]]
    ; CHECK: RET 0, implicit $al
    %0(s32) = COPY $edi
    %1(s1) = G_TRUNC %0(s32)
    %2(s8) = G_ANYEXT %1(s1)
    $al = COPY %2(s8)
    RET 0, implicit $al

...
---
name:            trunc_i32toi8
alignment:       16
legalized:       true
regBankSelected: true
registers:
  - { id: 0, class: gpr }
  - { id: 1, class: gpr }
body:             |
  bb.1 (%ir-block.0):
    liveins: $edi

    ; CHECK-LABEL: name: trunc_i32toi8
    ; CHECK: [[COPY:%[0-9]+]]:gr32 = COPY $edi
    ; CHECK: [[COPY1:%[0-9]+]]:gr8 = COPY [[COPY]].sub_8bit
    ; CHECK: $al = COPY [[COPY1]]
    ; CHECK: RET 0, implicit $al
    %0(s32) = COPY $edi
    %1(s8) = G_TRUNC %0(s32)
    $al = COPY %1(s8)
    RET 0, implicit $al

...
---
name:            trunc_i32toi16
alignment:       16
legalized:       true
regBankSelected: true
registers:
  - { id: 0, class: gpr }
  - { id: 1, class: gpr }
body:             |
  bb.1 (%ir-block.0):
    liveins: $edi

    ; CHECK-LABEL: name: trunc_i32toi16
    ; CHECK: [[COPY:%[0-9]+]]:gr32 = COPY $edi
    ; CHECK: [[COPY1:%[0-9]+]]:gr16 = COPY [[COPY]].sub_16bit
    ; CHECK: $ax = COPY [[COPY1]]
    ; CHECK: RET 0, implicit $ax
    %0(s32) = COPY $edi
    %1(s16) = G_TRUNC %0(s32)
    $ax = COPY %1(s16)
    RET 0, implicit $ax

...
---
name:            trunc_i64toi8
alignment:       16
legalized:       true
regBankSelected: true
registers:
  - { id: 0, class: gpr }
  - { id: 1, class: gpr }
body:             |
  bb.1 (%ir-block.0):
    liveins: $rdi

    ; CHECK-LABEL: name: trunc_i64toi8
    ; CHECK: [[COPY:%[0-9]+]]:gr64_with_sub_8bit = COPY $rdi
    ; CHECK: [[COPY1:%[0-9]+]]:gr8 = COPY [[COPY]].sub_8bit
    ; CHECK: $al = COPY [[COPY1]]
    ; CHECK: RET 0, implicit $al
    %0(s64) = COPY $rdi
    %1(s8) = G_TRUNC %0(s64)
    $al = COPY %1(s8)
    RET 0, implicit $al

...
---
name:            trunc_i64toi16
alignment:       16
legalized:       true
regBankSelected: true
registers:
  - { id: 0, class: gpr }
  - { id: 1, class: gpr }
body:             |
  bb.1 (%ir-block.0):
    liveins: $rdi

    ; CHECK-LABEL: name: trunc_i64toi16
    ; CHECK: [[COPY:%[0-9]+]]:gr64 = COPY $rdi
    ; CHECK: [[COPY1:%[0-9]+]]:gr16 = COPY [[COPY]].sub_16bit
    ; CHECK: $ax = COPY [[COPY1]]
    ; CHECK: RET 0, implicit $ax
    %0(s64) = COPY $rdi
    %1(s16) = G_TRUNC %0(s64)
    $ax = COPY %1(s16)
    RET 0, implicit $ax

...
---
name:            trunc_i64toi32
alignment:       16
legalized:       true
regBankSelected: true
registers:
  - { id: 0, class: gpr }
  - { id: 1, class: gpr }
body:             |
  bb.1 (%ir-block.0):
    liveins: $rdi

    ; CHECK-LABEL: name: trunc_i64toi32
    ; CHECK: [[COPY:%[0-9]+]]:gr64 = COPY $rdi
    ; CHECK: [[COPY1:%[0-9]+]]:gr32 = COPY [[COPY]].sub_32bit
    ; CHECK: $eax = COPY [[COPY1]]
    ; CHECK: RET 0, implicit $eax
    %0(s64) = COPY $rdi
    %1(s32) = G_TRUNC %0(s64)
    $eax = COPY %1(s32)
    RET 0, implicit $eax

...