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

# 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
  }

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