; LLVM IR from zeux/meshoptimizer :: gltf/image.ll (Z13mimeExtensionPKc)

; 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"

@_ZL10kMimeTypes = external hidden global [5 x [2 x ptr]], align 16
@.str.4 = external hidden unnamed_addr constant [5 x i8], align 1

; 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 i32 @strcmp(ptr noundef, ptr noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_Z13mimeExtensionPKc(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %24, %1
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = icmp ult i64 %7, 5
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  store i32 2, ptr %5, align 4
  br label %27

10:                                               ; preds = %6
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = getelementptr inbounds [5 x [2 x ptr]], ptr @_ZL10kMimeTypes, i64 0, i64 %11
  %13 = getelementptr inbounds [2 x ptr], ptr %12, i64 0, i64 0
  %14 = load ptr, ptr %13, align 16, !tbaa !5
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = call i32 @strcmp(ptr noundef %14, ptr noundef %15) #4
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %23

18:                                               ; preds = %10
  %19 = load i64, ptr %4, align 8, !tbaa !9
  %20 = getelementptr inbounds [5 x [2 x ptr]], ptr @_ZL10kMimeTypes, i64 0, i64 %19
  %21 = getelementptr inbounds [2 x ptr], ptr %20, i64 0, i64 1
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  store ptr %22, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %27

23:                                               ; preds = %10
  br label %24

24:                                               ; preds = %23
  %25 = load i64, ptr %4, align 8, !tbaa !9
  %26 = add i64 %25, 1
  store i64 %26, ptr %4, align 8, !tbaa !9
  br label %6, !llvm.loop !11

27:                                               ; preds = %18, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  %28 = load i32, ptr %5, align 4
  switch i32 %28, label %32 [
    i32 2, label %29
    i32 1, label %30
  ]

29:                                               ; preds = %27
  store ptr @.str.4, ptr %2, align 8
  br label %30

30:                                               ; preds = %29, %27
  %31 = load ptr, ptr %2, align 8
  ret ptr %31

32:                                               ; preds = %27
  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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@_ZL10kMimeTypes = external hidden local_unnamed_addr global [5 x [2 x ptr]], align 16
@.str.4 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef ptr @_Z13mimeExtensionPKc(ptr nocapture noundef readonly %0) local_unnamed_addr #1 {
  %2 = load ptr, ptr @_ZL10kMimeTypes, align 16, !tbaa !5
  %3 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %2, ptr noundef nonnull dereferenceable(1) %0) #2
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %21, label %5

5:                                                ; preds = %1
  %6 = load ptr, ptr getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 16), align 16, !tbaa !5
  %7 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %6, ptr noundef nonnull dereferenceable(1) %0) #2
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %21, label %9

9:                                                ; preds = %5
  %10 = load ptr, ptr getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 32), align 16, !tbaa !5
  %11 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %10, ptr noundef nonnull dereferenceable(1) %0) #2
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %21, label %13

13:                                               ; preds = %9
  %14 = load ptr, ptr getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 48), align 16, !tbaa !5
  %15 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %14, ptr noundef nonnull dereferenceable(1) %0) #2
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %21, label %17

17:                                               ; preds = %13
  %18 = load ptr, ptr getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 64), align 16, !tbaa !5
  %19 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %18, ptr noundef nonnull dereferenceable(1) %0) #2
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %21, label %.loopexit

21:                                               ; preds = %17, %13, %9, %5, %1
  %.lcssa = phi ptr [ @_ZL10kMimeTypes, %1 ], [ getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 16), %5 ], [ getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 32), %9 ], [ getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 48), %13 ], [ getelementptr inbounds (i8, ptr @_ZL10kMimeTypes, i64 64), %17 ]
  %22 = getelementptr inbounds i8, ptr %.lcssa, i64 8
  %23 = load ptr, ptr %22, align 8, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %17, %21
  %spec.select = phi ptr [ %23, %21 ], [ @.str.4, %17 ]
  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 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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