test/CodeGen/MIR/X86/subregister-index-operands.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -march=x86-64 -run-pass none -o - %s | FileCheck %s
# This test ensures that the MIR parser parses and prints subregisters index
# operands correctly.

--- |

  define zeroext i1 @t(i1 %c) {
  entry:
    ret i1 %c
  }

...
---
name:            t
tracksRegLiveness: true
registers:
  - { id: 0, class: gr32 }
  - { id: 1, class: gr8 }
body: |
  bb.0.entry:
    liveins: $edi, $eax
    ; CHECK-LABEL: name: t
    ; CHECK: liveins: $edi, $eax
    ; CHECK: [[INSERT_SUBREG:%[0-9]+]]:gr32 = INSERT_SUBREG $edi, $al, %subreg.sub_8bit
    ; CHECK: [[EXTRACT_SUBREG:%[0-9]+]]:gr8 = EXTRACT_SUBREG $eax, %subreg.sub_8bit_hi
    ; CHECK: $ax = REG_SEQUENCE [[EXTRACT_SUBREG]], %subreg.sub_8bit, [[EXTRACT_SUBREG]], %subreg.sub_8bit_hi
    ; CHECK: RETQ $ax
    %0 = INSERT_SUBREG $edi, $al, %subreg.sub_8bit
    %1 = EXTRACT_SUBREG $eax, %subreg.sub_8bit_hi
    $ax = REG_SEQUENCE %1, %subreg.sub_8bit, %1, %subreg.sub_8bit_hi
    RETQ $ax
...