; LLVM IR from ASDAlexander77/TypeScriptCompiler :: tsc/tsc-new-parser/parser_run.ll (Z14firstNonOptioniPPc)

; 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 willreturn memory(read)
declare i64 @strlen(ptr noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z14firstNonOptioniPPc(i32 noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %54, %2
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  store i32 2, ptr %7, align 4
  br label %57

13:                                               ; preds = %8
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds ptr, ptr %14, i64 %16
  %18 = load ptr, ptr %17, align 8, !tbaa !9
  %19 = call i64 @strlen(ptr noundef %18) #4
  %20 = icmp ult i64 %19, 3
  br i1 %20, label %21, label %27

21:                                               ; preds = %13
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds ptr, ptr %22, i64 %24
  %26 = load ptr, ptr %25, align 8, !tbaa !9
  store ptr %26, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %57

27:                                               ; preds = %13
  %28 = load ptr, ptr %5, align 8, !tbaa !9
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds ptr, ptr %28, i64 %30
  %32 = load ptr, ptr %31, align 8, !tbaa !9
  %33 = getelementptr inbounds i8, ptr %32, i64 0
  %34 = load i8, ptr %33, align 1, !tbaa !11
  %35 = sext i8 %34 to i32
  %36 = icmp ne i32 %35, 45
  br i1 %36, label %47, label %37

37:                                               ; preds = %27
  %38 = load ptr, ptr %5, align 8, !tbaa !9
  %39 = load i32, ptr %6, align 4, !tbaa !5
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds ptr, ptr %38, i64 %40
  %42 = load ptr, ptr %41, align 8, !tbaa !9
  %43 = getelementptr inbounds i8, ptr %42, i64 1
  %44 = load i8, ptr %43, align 1, !tbaa !11
  %45 = sext i8 %44 to i32
  %46 = icmp ne i32 %45, 45
  br i1 %46, label %47, label %53

47:                                               ; preds = %37, %27
  %48 = load ptr, ptr %5, align 8, !tbaa !9
  %49 = load i32, ptr %6, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds ptr, ptr %48, i64 %50
  %52 = load ptr, ptr %51, align 8, !tbaa !9
  store ptr %52, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %57

53:                                               ; preds = %37
  br label %54

54:                                               ; preds = %53
  %55 = load i32, ptr %6, align 4, !tbaa !5
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %6, align 4, !tbaa !5
  br label %8, !llvm.loop !12

57:                                               ; preds = %47, %21, %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %58 = load i32, ptr %7, align 4
  switch i32 %58, label %62 [
    i32 2, label %59
    i32 1, label %60
  ]

59:                                               ; preds = %57
  store ptr null, ptr %3, align 8
  br label %60

60:                                               ; preds = %59, %57
  %61 = load ptr, ptr %3, align 8
  ret ptr %61

62:                                               ; preds = %57
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind willreturn memory(read) "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 = { mustprogress 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 }
attributes #4 = { nounwind willreturn memory(read) }

!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++ 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: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @_Z14firstNonOptioniPPc(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #1 {
  %.not1718 = icmp sgt i32 %0, 1
  br i1 %.not1718, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.lr.ph

3:                                                ; preds = %10
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph.preheader, %3
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %3 ]
  %4 = getelementptr inbounds ptr, ptr %1, i64 %indvars.iv
  %5 = load ptr, ptr %4, align 8, !tbaa !7
  %6 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %5) #2
  %7 = icmp ult i64 %6, 3
  br i1 %7, label %._crit_edge, label %8

8:                                                ; preds = %.lr.ph
  %9 = load i8, ptr %5, align 1, !tbaa !11
  %.not = icmp eq i8 %9, 45
  br i1 %.not, label %10, label %._crit_edge

10:                                               ; preds = %8
  %11 = getelementptr inbounds i8, ptr %5, i64 1
  %12 = load i8, ptr %11, align 1, !tbaa !11
  %.not16 = icmp eq i8 %12, 45
  br i1 %.not16, label %3, label %._crit_edge

._crit_edge:                                      ; preds = %3, %.lr.ph, %10, %8, %2
  %spec.select = phi ptr [ null, %2 ], [ %5, %8 ], [ %5, %10 ], [ %5, %.lr.ph ], [ null, %3 ]
  ret ptr %spec.select
}

attributes #0 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 nofree nounwind willreturn memory(read, inaccessiblemem: none) 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 willreturn memory(read) }

!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"}
!7 = !{!8, !8, i64 0}
!8 = !{!"any pointer", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C++ TBAA"}
!11 = !{!9, !9, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass