; LLVM IR from dynexcoin/Dynex :: src/Common/StringView.ll (ZNK6Common10StringView10beginsWithERKc)

; 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"

%"class.Common::StringView" = type { ptr, i64 }

@.str = external hidden unnamed_addr constant [29 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [75 x i8], align 1
@__PRETTY_FUNCTION__._ZNK6Common10StringView10beginsWithERKc = external hidden unnamed_addr constant [58 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_ZNK6Common10StringView10beginsWithERKc(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef nonnull align 1 dereferenceable(1) %1) #1 align 2 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %6 = load ptr, ptr %4, align 8
  %7 = getelementptr inbounds %"class.Common::StringView", ptr %6, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = icmp ne ptr %8, null
  br i1 %9, label %14, label %10

10:                                               ; preds = %2
  %11 = getelementptr inbounds %"class.Common::StringView", ptr %6, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !12
  %13 = icmp eq i64 %12, 0
  br label %14

14:                                               ; preds = %10, %2
  %15 = phi i1 [ true, %2 ], [ %13, %10 ]
  br i1 %15, label %16, label %17

16:                                               ; preds = %14
  br label %19

17:                                               ; preds = %14
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.2, i32 noundef 181, ptr noundef @__PRETTY_FUNCTION__._ZNK6Common10StringView10beginsWithERKc) #2
  unreachable

18:                                               ; No predecessors!
  br label %19

19:                                               ; preds = %18, %16
  %20 = getelementptr inbounds %"class.Common::StringView", ptr %6, i32 0, i32 1
  %21 = load i64, ptr %20, align 8, !tbaa !12
  %22 = icmp eq i64 %21, 0
  br i1 %22, label %23, label %24

23:                                               ; preds = %19
  store i1 false, ptr %3, align 1
  br label %33

24:                                               ; preds = %19
  %25 = getelementptr inbounds %"class.Common::StringView", ptr %6, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !9
  %27 = load i8, ptr %26, align 1, !tbaa !13
  %28 = sext i8 %27 to i32
  %29 = load ptr, ptr %5, align 8, !tbaa !5
  %30 = load i8, ptr %29, align 1, !tbaa !13
  %31 = sext i8 %30 to i32
  %32 = icmp eq i32 %28, %31
  store i1 %32, ptr %3, align 1
  br label %33

33:                                               ; preds = %24, %23
  %34 = load i1, ptr %3, align 1
  ret i1 %34
}

attributes #0 = { noreturn nounwind "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 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 = { noreturn 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++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTSN6Common10StringViewE", !6, i64 0, !11, i64 8}
!11 = !{!"long", !7, i64 0}
!12 = !{!10, !11, i64 8}
!13 = !{!7, !7, i64 0}


; 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"

@.str = external hidden unnamed_addr constant [29 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [75 x i8], align 1
@__PRETTY_FUNCTION__._ZNK6Common10StringView10beginsWithERKc = external hidden unnamed_addr constant [58 x i8], align 1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_ZNK6Common10StringView10beginsWithERKc(ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %0, ptr nocapture noundef nonnull readonly align 1 dereferenceable(1) %1) local_unnamed_addr #1 align 2 {
  %3 = load ptr, ptr %0, align 8, !tbaa !5
  %.not = icmp ne ptr %3, null
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8
  %6 = icmp eq i64 %5, 0
  %or.cond = select i1 %.not, i1 true, i1 %6
  br i1 %or.cond, label %.critedge, label %7

7:                                                ; preds = %2
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.2, i32 noundef 181, ptr noundef nonnull @__PRETTY_FUNCTION__._ZNK6Common10StringView10beginsWithERKc) #2
  unreachable

.critedge:                                        ; preds = %2
  br i1 %6, label %12, label %8

8:                                                ; preds = %.critedge
  %9 = load i8, ptr %3, align 1, !tbaa !11
  %10 = load i8, ptr %1, align 1, !tbaa !11
  %11 = icmp eq i8 %9, %10
  br label %12

12:                                               ; preds = %.critedge, %8
  %.0 = phi i1 [ %11, %8 ], [ false, %.critedge ]
  ret i1 %.0
}

attributes #0 = { noreturn nounwind "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 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 = { noreturn 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, !7, i64 0}
!6 = !{!"_ZTSN6Common10StringViewE", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!8, !8, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass