llvm/test/CodeGen/X86/block-placement-triangle-profile-likely-prob.mir

# RUN: llc -mtriple=x86_64-unknown-linux-gnu -run-pass=block-placement -profile-likely-prob=80 %s -o - | FileCheck %s
#
# Test for profiled triangular CFG handling in MachineBlockPlacement
# Verify that a large ProfileLikelyProb value does not fail compilation

--- |
  define i32 @main(i32 %argc, ptr %argv) #0 !prof !0 {
  entry:
    %cmp = icmp sgt i32 %argc, 1
    br i1 %cmp, label %pred, label %succ, !prof !1

  succ:
    ret i32 0

  pred:
    br label %succ
  }

  attributes #0 = { nounwind "use-sample-profile" }

  !0 = !{!"function_entry_count", i64 1}
  !1 = !{!"branch_weights", i32 0, i32 1}
...
---
name:            main
alignment:       1
tracksRegLiveness: true
noPhis:          true
isSSA:           false
noVRegs:         true
liveins:
  - { reg: '$edi', virtual-reg: '' }
body:             |
  bb.0.entry:
    successors: %bb.1(0x00000000), %bb.2(0x80000000)
    liveins: $edi

    CMP32ri killed renamable $edi, 1, implicit-def $eflags
    JCC_1 %bb.2, 15, implicit killed $eflags

  bb.1.succ:
    $eax = MOV32ri 0
    RET64 $eax

  bb.2.pred:
    successors: %bb.1(0x80000000)

    JMP_1 %bb.1
...

# CHECK: name: main
# CHECK: bb.0.entry:
# CHECK: successors: %bb.1
# CHECK-SAME: %bb.2
# CHECK: JCC_1 %bb.1
# CHECK: bb.2.pred:
# CHECK: successors: %bb.1
# CHECK: bb.1.succ:
# CHECK: RET64