; LLVM IR from jspd-group/pegit :: src (stage)

; 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 i64 @findch(ptr noundef %0, i8 noundef signext %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i8, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i8 %1, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %8, ptr %6, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %28, %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %10, i32 1
  store ptr %11, ptr %4, align 8, !tbaa !5
  %12 = load i8, ptr %10, align 1, !tbaa !9
  %13 = sext i8 %12 to i32
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %15, label %29

15:                                               ; preds = %9
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load i8, ptr %16, align 1, !tbaa !9
  %18 = sext i8 %17 to i32
  %19 = load i8, ptr %5, align 1, !tbaa !9
  %20 = sext i8 %19 to i32
  %21 = icmp eq i32 %18, %20
  br i1 %21, label %22, label %28

22:                                               ; preds = %15
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = ptrtoint ptr %23 to i64
  %26 = ptrtoint ptr %24 to i64
  %27 = sub i64 %25, %26
  store i64 %27, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %30

28:                                               ; preds = %15
  br label %9, !llvm.loop !10

29:                                               ; preds = %9
  store i64 -1, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %30

30:                                               ; preds = %29, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %31 = load i64, ptr %3, align 8
  ret i64 %31
}

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 = !{!7, !7, 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"

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef i64 @findch(ptr noundef %0, i8 noundef signext %1) local_unnamed_addr #0 {
  %.pr = load i8, ptr %0, align 1, !tbaa !5
  br label %3

3:                                                ; preds = %5, %2
  %4 = phi i8 [ %7, %5 ], [ %.pr, %2 ]
  %.06 = phi ptr [ %6, %5 ], [ %0, %2 ]
  %.not = icmp eq i8 %4, 0
  br i1 %.not, label %.loopexit, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %.06, i64 1
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %8 = icmp eq i8 %7, %1
  br i1 %8, label %9, label %3, !llvm.loop !8

9:                                                ; preds = %5
  %10 = ptrtoint ptr %6 to i64
  %11 = ptrtoint ptr %0 to i64
  %12 = sub i64 %10, %11
  br label %.loopexit

.loopexit:                                        ; preds = %3, %9
  %.0 = phi i64 [ %12, %9 ], [ -1, %3 ]
  ret i64 %.0
}

attributes #0 = { nofree norecurse nosync nounwind 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" }

!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: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass