; LLVM IR from jingweizhanghuai/Morn :: example (TCP3)

; 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"

; Function Attrs: nounwind uwtable
define dso_local void @func(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %64, %1
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds i8, ptr %5, i64 %7
  %9 = load i8, ptr %8, align 1, !tbaa !11
  %10 = icmp ne i8 %9, 0
  br i1 %10, label %12, label %11

11:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  br label %67

12:                                               ; preds = %4
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds i8, ptr %13, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = sext i8 %17 to i32
  %19 = icmp sge i32 %18, 97
  br i1 %19, label %20, label %37

20:                                               ; preds = %12
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = load i32, ptr %3, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i8, ptr %21, i64 %23
  %25 = load i8, ptr %24, align 1, !tbaa !11
  %26 = sext i8 %25 to i32
  %27 = icmp sle i32 %26, 122
  br i1 %27, label %28, label %37

28:                                               ; preds = %20
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = load i32, ptr %3, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  %33 = load i8, ptr %32, align 1, !tbaa !11
  %34 = sext i8 %33 to i32
  %35 = add nsw i32 %34, -32
  %36 = trunc i32 %35 to i8
  store i8 %36, ptr %32, align 1, !tbaa !11
  br label %63

37:                                               ; preds = %20, %12
  %38 = load ptr, ptr %2, align 8, !tbaa !5
  %39 = load i32, ptr %3, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i8, ptr %38, i64 %40
  %42 = load i8, ptr %41, align 1, !tbaa !11
  %43 = sext i8 %42 to i32
  %44 = icmp sge i32 %43, 65
  br i1 %44, label %45, label %62

45:                                               ; preds = %37
  %46 = load ptr, ptr %2, align 8, !tbaa !5
  %47 = load i32, ptr %3, align 4, !tbaa !9
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i8, ptr %46, i64 %48
  %50 = load i8, ptr %49, align 1, !tbaa !11
  %51 = sext i8 %50 to i32
  %52 = icmp sle i32 %51, 90
  br i1 %52, label %53, label %62

53:                                               ; preds = %45
  %54 = load ptr, ptr %2, align 8, !tbaa !5
  %55 = load i32, ptr %3, align 4, !tbaa !9
  %56 = sext i32 %55 to i64
  %57 = getelementptr inbounds i8, ptr %54, i64 %56
  %58 = load i8, ptr %57, align 1, !tbaa !11
  %59 = sext i8 %58 to i32
  %60 = add nsw i32 %59, 32
  %61 = trunc i32 %60 to i8
  store i8 %61, ptr %57, align 1, !tbaa !11
  br label %62

62:                                               ; preds = %53, %45, %37
  br label %63

63:                                               ; preds = %62, %28
  br label %64

64:                                               ; preds = %63
  %65 = load i32, ptr %3, align 4, !tbaa !9
  %66 = add nsw i32 %65, 1
  store i32 %66, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !12

67:                                               ; preds = %11
  ret void
}

; 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

attributes #0 = { nounwind 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @func(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %.not18 = icmp eq i8 %2, 0
  br i1 %.not18, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %11, %1
  ret void

.lr.ph:                                           ; preds = %1, %11
  %indvars.iv = phi i64 [ %indvars.iv.next, %11 ], [ 0, %1 ]
  %3 = phi i8 [ %13, %11 ], [ %2, %1 ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %5 = add i8 %3, -97
  %or.cond = icmp ult i8 %5, 26
  br i1 %or.cond, label %6, label %7

6:                                                ; preds = %.lr.ph
  %narrow = add nsw i8 %3, -32
  br label %.sink.split

7:                                                ; preds = %.lr.ph
  %8 = add i8 %3, -65
  %or.cond17 = icmp ult i8 %8, 26
  br i1 %or.cond17, label %9, label %11

9:                                                ; preds = %7
  %10 = or disjoint i8 %3, 32
  br label %.sink.split

.sink.split:                                      ; preds = %9, %6
  %narrow.sink = phi i8 [ %narrow, %6 ], [ %10, %9 ]
  store i8 %narrow.sink, ptr %4, align 1, !tbaa !5
  br label %11

11:                                               ; preds = %.sink.split, %7
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %.not = icmp eq i8 %13, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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" }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass