llvm/test/Transforms/JumpThreading/compare.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; There should be no phi nodes left.
; RUN: opt -S -passes=jump-threading < %s | FileCheck %s

declare i32 @f1()
declare i32 @f2()
declare void @f3()

define i32 @test(i1 %cond) {
; CHECK-LABEL: @test(
; CHECK-NEXT:    br i1 [[COND:%.*]], label [[MERGE:%.*]], label [[MERGE_THREAD:%.*]]
; CHECK:       Merge.thread:
; CHECK-NEXT:    [[V2:%.*]] = call i32 @f2()
; CHECK-NEXT:    br label [[T2:%.*]]
; CHECK:       Merge:
; CHECK-NEXT:    [[V1:%.*]] = call i32 @f1()
; CHECK-NEXT:    [[A:%.*]] = icmp ne i32 [[V1]], 42
; CHECK-NEXT:    br i1 [[A]], label [[T2]], label [[F2:%.*]]
; CHECK:       T2:
; CHECK-NEXT:    call void @f3()
; CHECK-NEXT:    ret i32 1
; CHECK:       F2:
; CHECK-NEXT:    ret i32 0
;
  br i1 %cond, label %T1, label %F1

T1:
  %v1 = call i32 @f1()
  br label %Merge

F1:
  %v2 = call i32 @f2()
  br label %Merge

Merge:
  %B = phi i32 [%v1, %T1], [12, %F1]
  %A = icmp ne i32 %B, 42
  br i1 %A, label %T2, label %F2

T2:
  call void @f3()
  ret i32 1

F2:
  ret i32 0
}