llvm/test/CodeGen/X86/machine-block-freq.mir

# RUN: llc -mtriple=x86_64-gnu-linux --passes='print<machine-block-freq>' -filetype=null 2>&1 %s | FileCheck %s

---
name:            is_odd
tracksRegLiveness: true
body:             |
  bb.0:
    successors: %bb.2(0x40000000), %bb.1(0x40000000)
    liveins: $edi
  
    %0:gr32 = COPY $edi
    %1:gr32 = COPY killed %0
    %4:gr32 = MOV32ri 2
    $eax = COPY %1
    CDQ implicit-def $eax, implicit-def $edx, implicit $eax
    IDIV32r %4, implicit-def $eax, implicit-def $edx, implicit-def $eflags, implicit $eax, implicit $edx
    %5:gr32 = COPY $edx
    CMP32ri %5, 1, implicit-def $eflags
    JCC_1 %bb.2, 5, implicit $eflags
  
  bb.1:
    %7:gr32 = MOV32ri 1
    $eax = COPY %7
    RET64 implicit $eax
  
  bb.2:
    %6:gr32 = MOV32r0 implicit-def $eflags
    $eax = COPY %6
    RET64 implicit $eax
...

# CHECK: block-frequency-info: is_odd
# CHECK:  - BB1: float = 0.5
# CHECK:  - BB2: float = 0.5