; LLVM IR from xing1357/SimpleOS :: src (string)

; 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
declare dso_local i32 @strlen(ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @itoa(ptr noundef, i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @val(i8 noundef signext) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @toDeci(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  call void @itoa(ptr noundef %10, i32 noundef 16, i32 noundef %11)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %12 = load ptr, ptr %5, align 8, !tbaa !9
  %13 = call i32 @strlen(ptr noundef %12)
  store i32 %13, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 1, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = sub nsw i32 %14, 1
  store i32 %15, ptr %9, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %33, %2
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = icmp sge i32 %17, 0
  br i1 %18, label %19, label %36

19:                                               ; preds = %16
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = load i32, ptr %9, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds i8, ptr %20, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = call i32 @val(i8 noundef signext %24)
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = mul nsw i32 %25, %26
  %28 = load i32, ptr %8, align 4, !tbaa !5
  %29 = add nsw i32 %28, %27
  store i32 %29, ptr %8, align 4, !tbaa !5
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = mul nsw i32 %30, %31
  store i32 %32, ptr %7, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %19
  %34 = load i32, ptr %9, align 4, !tbaa !5
  %35 = add nsw i32 %34, -1
  store i32 %35, ptr %9, align 4, !tbaa !5
  br label %16, !llvm.loop !12

36:                                               ; preds = %16
  %37 = load i32, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i32 %37
}

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 = !{!"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 = 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: nounwind uwtable
declare dso_local i32 @strlen(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @itoa(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @val(i8 noundef signext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @toDeci(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  tail call void @itoa(ptr noundef undef, i32 noundef 16, i32 noundef %0)
  %3 = tail call i32 @strlen(ptr noundef undef)
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.0.in16 = phi i32 [ %.0, %.lr.ph ], [ %3, %2 ]
  %.01215 = phi i32 [ %7, %.lr.ph ], [ 0, %2 ]
  %.01314 = phi i32 [ %8, %.lr.ph ], [ 1, %2 ]
  %.0 = add nsw i32 %.0.in16, -1
  %5 = tail call i32 @val(i8 noundef signext undef)
  %6 = mul nsw i32 %5, %.01314
  %7 = add nsw i32 %6, %.01215
  %8 = mul nsw i32 %.01314, %1
  %9 = icmp ugt i32 %.0.in16, 1
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.012.lcssa = phi i32 [ 0, %2 ], [ %7, %.lr.ph ]
  ret i32 %.012.lcssa
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass