; LLVM IR from caryll/otfcc :: lib/table (cvt)

; 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"

%struct.table_cvt = type { i32, ptr }

; 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 ptr @otfcc_buildCvt(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i16, align 2
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %11, label %10

10:                                               ; preds = %2
  store ptr null, ptr %3, align 8
  br label %35

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %12 = call ptr (...) @bufnew()
  store ptr %12, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 2, ptr %7) #3
  store i16 0, ptr %7, align 2, !tbaa !9
  br label %13

13:                                               ; preds = %30, %11
  %14 = load i16, ptr %7, align 2, !tbaa !9
  %15 = zext i16 %14 to i32
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.table_cvt, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !11
  %19 = icmp ult i32 %15, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 2, ptr %7) #3
  br label %33

21:                                               ; preds = %13
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.table_cvt, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  %26 = load i16, ptr %7, align 2, !tbaa !9
  %27 = zext i16 %26 to i64
  %28 = getelementptr inbounds i16, ptr %25, i64 %27
  %29 = load i16, ptr %28, align 2, !tbaa !9
  call void @bufwrite16b(ptr noundef %22, i16 noundef zeroext %29)
  br label %30

30:                                               ; preds = %21
  %31 = load i16, ptr %7, align 2, !tbaa !9
  %32 = add i16 %31, 1
  store i16 %32, ptr %7, align 2, !tbaa !9
  br label %13, !llvm.loop !15

33:                                               ; preds = %20
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %34, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %35

35:                                               ; preds = %33, %10
  %36 = load ptr, ptr %3, align 8
  ret ptr %36
}

declare ptr @bufnew(...) #2

declare void @bufwrite16b(ptr noundef, i16 noundef zeroext) #2

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 = { "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 }

!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 = !{!10, !10, i64 0}
!10 = !{!"short", !7, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"", !13, i64 0, !6, i64 8}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !6, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"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: nounwind uwtable
define dso_local ptr @otfcc_buildCvt(ptr noundef readonly %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %.loopexit, label %3

3:                                                ; preds = %2
  %4 = tail call ptr (...) @bufnew() #2
  %5 = load i32, ptr %0, align 8, !tbaa !5
  %.not11 = icmp eq i32 %5, 0
  br i1 %.not11, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  br label %7

7:                                                ; preds = %.lr.ph, %7
  %.010 = phi i16 [ 0, %.lr.ph ], [ %12, %7 ]
  %8 = load ptr, ptr %6, align 8, !tbaa !11
  %9 = zext i16 %.010 to i64
  %10 = getelementptr inbounds i16, ptr %8, i64 %9
  %11 = load i16, ptr %10, align 2, !tbaa !12
  tail call void @bufwrite16b(ptr noundef %4, i16 noundef zeroext %11) #2
  %12 = add i16 %.010, 1
  %13 = zext i16 %12 to i32
  %14 = load i32, ptr %0, align 8, !tbaa !5
  %15 = icmp ugt i32 %14, %13
  br i1 %15, label %7, label %.loopexit, !llvm.loop !14

.loopexit:                                        ; preds = %7, %3, %2
  %.08 = phi ptr [ null, %2 ], [ %4, %3 ], [ %4, %7 ]
  ret ptr %.08
}

declare ptr @bufnew(...) local_unnamed_addr #1

declare void @bufwrite16b(ptr noundef, i16 noundef zeroext) local_unnamed_addr #1

attributes #0 = { 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 = { "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, !7, i64 0}
!6 = !{!"", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"short", !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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