; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/MdeModulePkg/Universal (AsciiHiiToLower)

; 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 = external hidden unnamed_addr constant [148 x i8], align 1
@.str.16 = external hidden unnamed_addr constant [29 x i8], align 1

declare zeroext i8 @DebugAssertEnabled() #0

declare void @DebugAssert(ptr noundef, i64 noundef, ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @AsciiHiiToLower(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %1
  %4 = call zeroext i8 @DebugAssertEnabled()
  %5 = icmp ne i8 %4, 0
  br i1 %5, label %6, label %11

6:                                                ; preds = %3
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  call void @DebugAssert(ptr noundef @.str, i64 noundef 1982, ptr noundef @.str.16)
  br label %10

10:                                               ; preds = %9, %6
  br label %11

11:                                               ; preds = %10, %3
  br label %12

12:                                               ; preds = %11
  br label %13

13:                                               ; preds = %37, %12
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i8, ptr %14, align 1, !tbaa !9
  %16 = sext i8 %15 to i32
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %40

18:                                               ; preds = %13
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = load i8, ptr %19, align 1, !tbaa !9
  %21 = sext i8 %20 to i32
  %22 = icmp sge i32 %21, 65
  br i1 %22, label %23, label %36

23:                                               ; preds = %18
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = load i8, ptr %24, align 1, !tbaa !9
  %26 = sext i8 %25 to i32
  %27 = icmp sle i32 %26, 90
  br i1 %27, label %28, label %36

28:                                               ; preds = %23
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = load i8, ptr %29, align 1, !tbaa !9
  %31 = sext i8 %30 to i32
  %32 = sub nsw i32 %31, 65
  %33 = add nsw i32 %32, 97
  %34 = trunc i32 %33 to i8
  %35 = load ptr, ptr %2, align 8, !tbaa !5
  store i8 %34, ptr %35, align 1, !tbaa !9
  br label %36

36:                                               ; preds = %28, %23, %18
  br label %37

37:                                               ; preds = %36
  %38 = load ptr, ptr %2, align 8, !tbaa !5
  %39 = getelementptr inbounds i8, ptr %38, i32 1
  store ptr %39, ptr %2, align 8, !tbaa !5
  br label %13, !llvm.loop !10

40:                                               ; preds = %13
  ret void
}

attributes #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 = { 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" }

!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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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 = external hidden unnamed_addr constant [148 x i8], align 1
@.str.16 = external hidden unnamed_addr constant [29 x i8], align 1

declare zeroext i8 @DebugAssertEnabled() local_unnamed_addr #0

declare void @DebugAssert(ptr noundef, i64 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @AsciiHiiToLower(ptr noundef %0) local_unnamed_addr #1 {
  %2 = tail call zeroext i8 @DebugAssertEnabled() #2
  %3 = icmp eq i8 %2, 0
  %4 = icmp ne ptr %0, null
  %or.cond = or i1 %4, %3
  br i1 %or.cond, label %6, label %5

5:                                                ; preds = %1
  tail call void @DebugAssert(ptr noundef nonnull @.str, i64 noundef 1982, ptr noundef nonnull @.str.16) #2
  br label %6

6:                                                ; preds = %1, %5
  %7 = load i8, ptr %0, align 1, !tbaa !5
  %.not10 = icmp eq i8 %7, 0
  br i1 %.not10, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %6, %11
  %8 = phi i8 [ %13, %11 ], [ %7, %6 ]
  %.011 = phi ptr [ %12, %11 ], [ %0, %6 ]
  %9 = add i8 %8, -65
  %or.cond9 = icmp ult i8 %9, 26
  br i1 %or.cond9, label %10, label %11

10:                                               ; preds = %.lr.ph
  %narrow = or disjoint i8 %8, 32
  store i8 %narrow, ptr %.011, align 1, !tbaa !5
  br label %11

11:                                               ; preds = %.lr.ph, %10
  %12 = getelementptr inbounds i8, ptr %.011, i64 1
  %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

._crit_edge:                                      ; preds = %11, %6
  ret void
}

attributes #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 = { 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 #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 = !{!"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,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass