; LLVM IR from xirc/cp-algorithm :: aoj/ITP2/ITP2-11A/main.ll (Z5solvei)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str.2 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [78 x i8], align 1
@__PRETTY_FUNCTION__._Z5solvei = external hidden unnamed_addr constant [16 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4dumpi(i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvei(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp sge i32 %5, 1
  br i1 %6, label %7, label %10

7:                                                ; preds = %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp sle i32 %8, 18
  br label %10

10:                                               ; preds = %7, %1
  %11 = phi i1 [ false, %1 ], [ %9, %7 ]
  br i1 %11, label %12, label %13

12:                                               ; preds = %10
  br label %15

13:                                               ; preds = %10
  call void @__assert_fail(ptr noundef @.str.2, ptr noundef @.str.3, i32 noundef 22, ptr noundef @__PRETTY_FUNCTION__._Z5solvei) #3
  unreachable

14:                                               ; No predecessors!
  br label %15

15:                                               ; preds = %14, %12
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = shl i32 1, %16
  store i32 %17, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %25, %15
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  br label %28

23:                                               ; preds = %18
  %24 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z4dumpi(i32 noundef %24)
  br label %25

25:                                               ; preds = %23
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %4, align 4, !tbaa !5
  br label %18, !llvm.loop !9

28:                                               ; preds = %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #2

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { noreturn nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { noreturn nounwind }
attributes #4 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

@.str.2 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [78 x i8], align 1
@__PRETTY_FUNCTION__._Z5solvei = external hidden unnamed_addr constant [16 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4dumpi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5solvei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = add i32 %0, -1
  %3 = icmp ult i32 %2, 18
  br i1 %3, label %.preheader, label %4

4:                                                ; preds = %1
  tail call void @__assert_fail(ptr noundef nonnull @.str.2, ptr noundef nonnull @.str.3, i32 noundef 22, ptr noundef nonnull @__PRETTY_FUNCTION__._Z5solvei) #2
  unreachable

5:                                                ; preds = %.preheader
  ret void

.preheader:                                       ; preds = %1, %.preheader
  %.08 = phi i32 [ %6, %.preheader ], [ 0, %1 ]
  tail call void @_Z4dumpi(i32 noundef %.08)
  %6 = add nuw nsw i32 %.08, 1
  %.0.highbits = lshr i32 %6, %0
  %7 = icmp eq i32 %.0.highbits, 0
  br i1 %7, label %.preheader, label %5, !llvm.loop !5
}

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { noreturn nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { noreturn nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass