; LLVM IR from HiroIshida/tinyfk :: urdf_parser/tinyxml/tinyxmlparser.ll (ZN9TiXmlBase10IsAlphaNumEh13TiXmlEncoding)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN9TiXmlBase10IsAlphaNumEh13TiXmlEncoding(i8 noundef zeroext %0, i32 noundef %1) #0 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca i8, align 1
  %5 = alloca i32, align 4
  store i8 %0, ptr %4, align 1, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !8
  %6 = load i8, ptr %4, align 1, !tbaa !5
  %7 = zext i8 %6 to i32
  %8 = icmp slt i32 %7, 127
  br i1 %8, label %9, label %13

9:                                                ; preds = %2
  %10 = load i8, ptr %4, align 1, !tbaa !5
  %11 = zext i8 %10 to i32
  %12 = call i32 @isalnum(i32 noundef %11) #2
  store i32 %12, ptr %3, align 4
  br label %14

13:                                               ; preds = %2
  store i32 1, ptr %3, align 4
  br label %14

14:                                               ; preds = %13, %9
  %15 = load i32, ptr %3, align 4
  ret i32 %15
}

; Function Attrs: inlinehint mustprogress nounwind willreturn memory(read) uwtable
declare i32 @isalnum(i32 noundef) #1

attributes #0 = { 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 #1 = { inlinehint mustprogress nounwind willreturn memory(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" }
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 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"_ZTS13TiXmlEncoding", !6, 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"

; Function Attrs: mustprogress nofree nounwind willreturn memory(read) uwtable
define dso_local noundef i32 @_ZN9TiXmlBase10IsAlphaNumEh13TiXmlEncoding(i8 noundef zeroext %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = icmp ult i8 %0, 127
  br i1 %3, label %4, label %7

4:                                                ; preds = %2
  %5 = zext nneg i8 %0 to i32
  %6 = tail call i32 @isalnum(i32 noundef %5) #2
  br label %7

7:                                                ; preds = %2, %4
  %.0 = phi i32 [ %6, %4 ], [ 1, %2 ]
  ret i32 %.0
}

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @isalnum(i32 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind willreturn memory(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" }
attributes #1 = { inlinehint mustprogress nofree nounwind willreturn memory(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" }
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)"}


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