; LLVM IR from lfarcaro/ARINC653_ARMV7A_AM335X :: Hardware (consoleUtils)

; 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"

@ConsoleType = external hidden global i32, align 4
@.str.1 = external hidden unnamed_addr constant [44 x i8], align 1

declare i32 @UARTPuts(ptr noundef, 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: nounwind uwtable
define dso_local zeroext i8 @ConsoleUtilsGetChar() #2 {
  %1 = alloca i8, align 1
  %2 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 1, ptr %1) #3
  store i8 0, ptr %1, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %2) #3
  store i8 0, ptr %2, align 1, !tbaa !5
  %3 = load i32, ptr @ConsoleType, align 4, !tbaa !8
  %4 = icmp eq i32 1, %3
  br i1 %4, label %5, label %7

5:                                                ; preds = %0
  %6 = call i32 @UARTPuts(ptr noundef @.str.1, i32 noundef -1)
  br label %23

7:                                                ; preds = %0
  %8 = call zeroext i8 @UARTGetc()
  store i8 %8, ptr %1, align 1, !tbaa !5
  %9 = load i8, ptr %1, align 1, !tbaa !5
  store i8 %9, ptr %2, align 1, !tbaa !5
  br label %10

10:                                               ; preds = %20, %7
  %11 = load i8, ptr %2, align 1, !tbaa !5
  %12 = zext i8 %11 to i32
  %13 = icmp ne i32 %12, 10
  br i1 %13, label %14, label %18

14:                                               ; preds = %10
  %15 = load i8, ptr %2, align 1, !tbaa !5
  %16 = zext i8 %15 to i32
  %17 = icmp ne i32 %16, 13
  br label %18

18:                                               ; preds = %14, %10
  %19 = phi i1 [ false, %10 ], [ %17, %14 ]
  br i1 %19, label %20, label %22

20:                                               ; preds = %18
  %21 = call zeroext i8 @UARTGetc()
  store i8 %21, ptr %2, align 1, !tbaa !5
  br label %10, !llvm.loop !10

22:                                               ; preds = %18
  br label %23

23:                                               ; preds = %22, %5
  %24 = load i8, ptr %1, align 1, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %1) #3
  ret i8 %24
}

declare zeroext i8 @UARTGetc() #0

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, 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"

@ConsoleType = external hidden local_unnamed_addr global i32, align 4
@.str.1 = external hidden unnamed_addr constant [44 x i8], align 1

declare i32 @UARTPuts(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i8 @ConsoleUtilsGetChar() local_unnamed_addr #1 {
  %1 = load i32, ptr @ConsoleType, align 4, !tbaa !5
  %2 = icmp eq i32 %1, 1
  br i1 %2, label %3, label %5

3:                                                ; preds = %0
  %4 = tail call i32 @UARTPuts(ptr noundef nonnull @.str.1, i32 noundef -1) #2
  br label %.loopexit

5:                                                ; preds = %0
  %6 = tail call zeroext i8 @UARTGetc() #2
  br label %7

7:                                                ; preds = %8, %5
  %.0 = phi i8 [ %6, %5 ], [ %9, %8 ]
  switch i8 %.0, label %8 [
    i8 13, label %.loopexit
    i8 10, label %.loopexit
  ]

8:                                                ; preds = %7
  %9 = tail call zeroext i8 @UARTGetc() #2
  br label %7, !llvm.loop !9

.loopexit:                                        ; preds = %7, %7, %3
  %.04 = phi i8 [ 0, %3 ], [ %6, %7 ], [ %6, %7 ]
  ret i8 %.04
}

declare zeroext i8 @UARTGetc() local_unnamed_addr #0

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass