llvm-project/llvm/test/CodeGen/MIR/X86/machine-basic-block-operands.mir

# RUN: llc -march=x86-64 -run-pass none -o - %s | FileCheck %s
# This test ensures that the MIR parser parses machine basic block operands.

--- |

  define i32 @foo(i32* %p) {
  entry:
    %a = load i32, i32* %p
    %0 = icmp sle i32 %a, 10
    br i1 %0, label %less, label %exit

  less:
    ret i32 0

  exit:
    ret i32 %a
  }

  define i32 @bar(i32* %p) {
  entry:
    %a = load i32, i32* %p
    %b = icmp sle i32 %a, 10
    br i1 %b, label %0, label %1

  ; <label>:0
    ret i32 0

  ; <label>:1
    ret i32 %a
  }

...
---
# CHECK: name: foo
name:            foo
body: |
  ; CHECK: bb.0.entry
  bb.0.entry:
    successors: %bb.1, %bb.2

    $eax = MOV32rm $rdi, 1, _, 0, _
    ; CHECK:      CMP32ri8 $eax, 10
    ; CHECK-NEXT: JCC_1 %bb.2, 15
    CMP32ri8 $eax, 10, implicit-def $eflags
    JCC_1 %bb.2, 15, implicit $eflags
  ; CHECK: bb.1.less:

  bb.1.less:
    $eax = MOV32r0 implicit-def $eflags

  bb.2.exit:
    RET64 $eax
...
---
# CHECK: name: bar
name:            bar
body: |
  ; CHECK: bb.0.entry:
  bb.0.entry:
    successors: %bb.1, %bb.3

    $eax = MOV32rm $rdi, 1, _, 0, _
    ; CHECK:      CMP32ri8 $eax, 10
    ; CHECK-NEXT: JCC_1 %bb.2, 15
    CMP32ri8 $eax, 10, implicit-def $eflags
    JCC_1 %bb.3, 15, implicit $eflags

  bb.1:
    $eax = MOV32r0 implicit-def $eflags

  bb.3:
    RET64 $eax
...