llvm/test/CodeGen/MIR/X86/successor-basic-blocks-weights.mir

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

--- |

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

  less:
    ret i32 0

  exit:
    ret i32 %a
  }

...
---
name:            foo
body: |
  ; CHECK-LABEL: bb.0.entry:
  ; CHECK:         successors: %bb.1(0x2a3d70a4), %bb.2(0x55c28f5c)
  ; CHECK-LABEL: bb.1.less:
  bb.0.entry:
    successors: %bb.1 (33), %bb.2(67)
    liveins: $edi

    CMP32ri8 $edi, 10, implicit-def $eflags
    JCC_1 %bb.2, 15, implicit killed $eflags

  bb.1.less:
    $eax = MOV32r0 implicit-def dead $eflags
    RET64 killed $eax

  bb.2.exit:
    liveins: $edi

    $eax = COPY killed $edi
    RET64 killed $eax
...