; LLVM IR from smwikipedia/EmbeddedAndRTOSSamples :: C2.6 (t)

; 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"

%struct.uart = type { ptr, i32, [128 x i8], i32, i32, i32, i32, [128 x i8], i32, i32, i32, i32, i32 }
%struct.DisplayContext = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }

@uart = external global [4 x %struct.uart], align 16
@_binary_image_bmp_start = external global i8, align 1
@gDisplayContext = external global %struct.DisplayContext, align 4
@.str = external hidden unnamed_addr constant [74 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [47 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local void @main() #0 {
  %1 = alloca ptr, align 8
  %2 = alloca [128 x i8], align 16
  %3 = alloca ptr, align 8
  %4 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 128, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %5 = load i32, ptr inttoptr (i64 269746192 to ptr), align 4, !tbaa !5
  %6 = or i32 %5, 4096
  store i32 %6, ptr inttoptr (i64 269746192 to ptr), align 4, !tbaa !5
  %7 = load i32, ptr inttoptr (i64 269746192 to ptr), align 4, !tbaa !5
  %8 = or i32 %7, 8192
  store i32 %8, ptr inttoptr (i64 269746192 to ptr), align 4, !tbaa !5
  call void (...) @uart_init()
  store ptr @uart, ptr %3, align 8, !tbaa !9
  %9 = call i32 (...) @fbuf_init()
  store ptr @_binary_image_bmp_start, ptr %1, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %4) #3
  store i8 48, ptr %4, align 1, !tbaa !11
  br label %10

10:                                               ; preds = %33, %0
  br label %11

11:                                               ; preds = %10
  %12 = load i32, ptr getelementptr inbounds (%struct.DisplayContext, ptr @gDisplayContext, i32 0, i32 11), align 4, !tbaa !12
  %13 = load i32, ptr getelementptr inbounds (%struct.DisplayContext, ptr @gDisplayContext, i32 0, i32 13), align 4, !tbaa !14
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %22

15:                                               ; preds = %11
  %16 = load ptr, ptr %3, align 8, !tbaa !9
  call void @uprints(ptr noundef %16, ptr noundef @.str)
  %17 = load ptr, ptr %3, align 8, !tbaa !9
  %18 = getelementptr inbounds [128 x i8], ptr %2, i64 0, i64 0
  call void @ugets(ptr noundef %17, ptr noundef %18)
  %19 = load ptr, ptr %3, align 8, !tbaa !9
  call void @uprints(ptr noundef %19, ptr noundef @.str.1)
  %20 = load ptr, ptr %3, align 8, !tbaa !9
  %21 = getelementptr inbounds [128 x i8], ptr %2, i64 0, i64 0
  call void @uprints(ptr noundef %20, ptr noundef %21)
  br label %22

22:                                               ; preds = %15, %11
  %23 = load i8, ptr %4, align 1, !tbaa !11
  call void @putcursor(i8 noundef zeroext %23)
  %24 = load i8, ptr %4, align 1, !tbaa !11
  %25 = zext i8 %24 to i32
  %26 = add nsw i32 %25, 1
  %27 = icmp sgt i32 %26, 57
  br i1 %27, label %28, label %29

28:                                               ; preds = %22
  br label %33

29:                                               ; preds = %22
  %30 = load i8, ptr %4, align 1, !tbaa !11
  %31 = zext i8 %30 to i32
  %32 = add nsw i32 %31, 1
  br label %33

33:                                               ; preds = %29, %28
  %34 = phi i32 [ 48, %28 ], [ %32, %29 ]
  %35 = trunc i32 %34 to i8
  store i8 %35, ptr %4, align 1, !tbaa !11
  br label %10
}

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

declare void @uart_init(...) #2

declare i32 @fbuf_init(...) #2

declare void @uprints(ptr noundef, ptr noundef) #2

declare void @ugets(ptr noundef, ptr noundef) #2

declare void @putcursor(i8 noundef zeroext) #2

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 = { "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 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = !{!13, !6, i64 44}
!13 = !{!"", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20, !6, i64 24, !6, i64 28, !6, i64 32, !6, i64 36, !6, i64 40, !6, i64 44, !6, i64 48, !6, i64 52, !6, i64 56}
!14 = !{!13, !6, i64 52}


; 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"

%struct.uart = type { ptr, i32, [128 x i8], i32, i32, i32, i32, [128 x i8], i32, i32, i32, i32, i32 }
%struct.DisplayContext = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }

@uart = external global [4 x %struct.uart], align 16
@gDisplayContext = external local_unnamed_addr global %struct.DisplayContext, align 4
@.str = external hidden unnamed_addr constant [74 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [47 x i8], align 1

; Function Attrs: noreturn nounwind uwtable
define dso_local void @main() local_unnamed_addr #0 {
  %1 = alloca [128 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 128, ptr nonnull %1) #3
  %2 = load i32, ptr inttoptr (i64 269746192 to ptr), align 16, !tbaa !5
  %3 = or i32 %2, 12288
  store i32 %3, ptr inttoptr (i64 269746192 to ptr), align 16, !tbaa !5
  tail call void (...) @uart_init() #3
  %4 = tail call i32 (...) @fbuf_init() #3
  br label %5

5:                                                ; preds = %10, %0
  %.0 = phi i8 [ 48, %0 ], [ %13, %10 ]
  %6 = load i32, ptr getelementptr inbounds (i8, ptr @gDisplayContext, i64 44), align 4, !tbaa !9
  %7 = load i32, ptr getelementptr inbounds (i8, ptr @gDisplayContext, i64 52), align 4, !tbaa !11
  %8 = icmp eq i32 %6, %7
  br i1 %8, label %9, label %10

9:                                                ; preds = %5
  call void @uprints(ptr noundef nonnull @uart, ptr noundef nonnull @.str) #3
  call void @ugets(ptr noundef nonnull @uart, ptr noundef nonnull %1) #3
  call void @uprints(ptr noundef nonnull @uart, ptr noundef nonnull @.str.1) #3
  call void @uprints(ptr noundef nonnull @uart, ptr noundef nonnull %1) #3
  br label %10

10:                                               ; preds = %9, %5
  call void @putcursor(i8 noundef zeroext %.0) #3
  %11 = add i8 %.0, 1
  %12 = icmp ugt i8 %.0, 56
  %13 = select i1 %12, i8 48, i8 %11
  br label %5
}

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

declare void @uart_init(...) local_unnamed_addr #2

declare i32 @fbuf_init(...) local_unnamed_addr #2

declare void @uprints(ptr noundef, ptr noundef) local_unnamed_addr #2

declare void @ugets(ptr noundef, ptr noundef) local_unnamed_addr #2

declare void @putcursor(i8 noundef zeroext) local_unnamed_addr #2

attributes #0 = { noreturn 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { "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 = { 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/C++ TBAA"}
!9 = !{!10, !6, i64 44}
!10 = !{!"", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20, !6, i64 24, !6, i64 28, !6, i64 32, !6, i64 36, !6, i64 40, !6, i64 44, !6, i64 48, !6, i64 52, !6, i64 56}
!11 = !{!10, !6, i64 52}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass