; LLVM IR from lfarcaro/ARINC653_ARMV7A_Z7000 :: ARINC653_ARMV7A_Z7000.sw/ARINC653_ARMV7A_Z7000/src/ARINC653 (arinc653_common)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local zeroext i8 @COMMON_COMPARESTRINGS(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca i8, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %39, %3
  %11 = load i32, ptr %8, align 4, !tbaa !9
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = icmp ult i32 %11, %12
  br i1 %13, label %14, label %40

14:                                               ; preds = %10
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = load i32, ptr %8, align 4, !tbaa !9
  %17 = zext i32 %16 to i64
  %18 = getelementptr inbounds i8, ptr %15, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = zext i8 %19 to i32
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = load i32, ptr %8, align 4, !tbaa !9
  %23 = zext i32 %22 to i64
  %24 = getelementptr inbounds i8, ptr %21, i64 %23
  %25 = load i8, ptr %24, align 1, !tbaa !11
  %26 = zext i8 %25 to i32
  %27 = icmp ne i32 %20, %26
  br i1 %27, label %28, label %29

28:                                               ; preds = %14
  br label %40

29:                                               ; preds = %14
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i32, ptr %8, align 4, !tbaa !9
  %32 = add i32 %31, 1
  store i32 %32, ptr %8, align 4, !tbaa !9
  %33 = zext i32 %31 to i64
  %34 = getelementptr inbounds i8, ptr %30, i64 %33
  %35 = load i8, ptr %34, align 1, !tbaa !11
  %36 = zext i8 %35 to i32
  %37 = icmp eq i32 %36, 0
  br i1 %37, label %38, label %39

38:                                               ; preds = %29
  store i8 1, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %41

39:                                               ; preds = %29
  br label %10, !llvm.loop !12

40:                                               ; preds = %28, %10
  store i8 0, ptr %4, align 1
  store i32 1, ptr %9, align 4
  br label %41

41:                                               ; preds = %40, %38
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %42 = load i8, ptr %4, align 1
  ret i8 %42
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"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: read) uwtable
define dso_local zeroext range(i8 0, 2) i8 @COMMON_COMPARESTRINGS(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %wide.trip.count = zext i32 %2 to i64
  br label %4

4:                                                ; preds = %10, %3
  %indvars.iv = phi i64 [ %indvars.iv.next, %10 ], [ 0, %3 ]
  %exitcond.not = icmp eq i64 %indvars.iv, %wide.trip.count
  br i1 %exitcond.not, label %12, label %5

5:                                                ; preds = %4
  %6 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %9 = load i8, ptr %8, align 1, !tbaa !5
  %.not = icmp eq i8 %7, %9
  br i1 %.not, label %10, label %12

10:                                               ; preds = %5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = icmp eq i8 %7, 0
  br i1 %11, label %12, label %4, !llvm.loop !8

12:                                               ; preds = %4, %5, %10
  %.08 = phi i8 [ 1, %10 ], [ 0, %5 ], [ 0, %4 ]
  ret i8 %.08
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass