; LLVM IR from yourtion/LearningMasteringAlgorithms-C :: source (ohtbl)

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

9:                                                ; preds = %69, %2
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.OHTbl_, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = icmp slt i32 %10, %13
  br i1 %14, label %15, label %72

15:                                               ; preds = %9
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.OHTbl_, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %19, align 8, !tbaa !5
  %21 = call i32 %18(ptr noundef %20)
  %22 = load i32, ptr %7, align 4, !tbaa !9
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.OHTbl_, ptr %23, i32 0, i32 3
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load ptr, ptr %26, align 8, !tbaa !5
  %28 = call i32 %25(ptr noundef %27)
  %29 = mul nsw i32 %22, %28
  %30 = add nsw i32 %21, %29
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.OHTbl_, ptr %31, i32 0, i32 0
  %33 = load i32, ptr %32, align 8, !tbaa !11
  %34 = srem i32 %30, %33
  store i32 %34, ptr %6, align 4, !tbaa !9
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.OHTbl_, ptr %35, i32 0, i32 7
  %37 = load ptr, ptr %36, align 8, !tbaa !15
  %38 = load i32, ptr %6, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds ptr, ptr %37, i64 %39
  %41 = load ptr, ptr %40, align 8, !tbaa !5
  %42 = icmp eq ptr %41, null
  br i1 %42, label %43, label %44

43:                                               ; preds = %15
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %73

44:                                               ; preds = %15
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.OHTbl_, ptr %45, i32 0, i32 4
  %47 = load ptr, ptr %46, align 8, !tbaa !16
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.OHTbl_, ptr %48, i32 0, i32 7
  %50 = load ptr, ptr %49, align 8, !tbaa !15
  %51 = load i32, ptr %6, align 4, !tbaa !9
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds ptr, ptr %50, i64 %52
  %54 = load ptr, ptr %53, align 8, !tbaa !5
  %55 = load ptr, ptr %5, align 8, !tbaa !5
  %56 = load ptr, ptr %55, align 8, !tbaa !5
  %57 = call i32 %47(ptr noundef %54, ptr noundef %56)
  %58 = icmp ne i32 %57, 0
  br i1 %58, label %59, label %68

59:                                               ; preds = %44
  %60 = load ptr, ptr %4, align 8, !tbaa !5
  %61 = getelementptr inbounds %struct.OHTbl_, ptr %60, i32 0, i32 7
  %62 = load ptr, ptr %61, align 8, !tbaa !15
  %63 = load i32, ptr %6, align 4, !tbaa !9
  %64 = sext i32 %63 to i64
  %65 = getelementptr inbounds ptr, ptr %62, i64 %64
  %66 = load ptr, ptr %65, align 8, !tbaa !5
  %67 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %66, ptr %67, align 8, !tbaa !5
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %73

68:                                               ; preds = %44
  br label %69

69:                                               ; preds = %68
  %70 = load i32, ptr %7, align 4, !tbaa !9
  %71 = add nsw i32 %70, 1
  store i32 %71, ptr %7, align 4, !tbaa !9
  br label %9, !llvm.loop !17

72:                                               ; preds = %9
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %73

73:                                               ; preds = %72, %59, %43
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %74 = load i32, ptr %3, align 4
  ret i32 %74
}

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"OHTbl_", !10, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !10, i64 48, !6, i64 56}
!13 = !{!12, !6, i64 16}
!14 = !{!12, !6, i64 24}
!15 = !{!12, !6, i64 56}
!16 = !{!12, !6, i64 32}
!17 = distinct !{!17, !18}
!18 = !{!"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 range(i32 -1, 1) i32 @ohtbl_lookup(ptr nocapture noundef readonly %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  %7 = getelementptr inbounds i8, ptr %0, i64 56
  %8 = getelementptr inbounds i8, ptr %0, i64 32
  br label %13

9:                                                ; preds = %29
  %10 = add nuw nsw i32 %.021, 1
  %11 = load i32, ptr %0, align 8, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %13, label %.loopexit, !llvm.loop !11

13:                                               ; preds = %.lr.ph, %9
  %.021 = phi i32 [ 0, %.lr.ph ], [ %10, %9 ]
  %14 = load ptr, ptr %5, align 8, !tbaa !13
  %15 = load ptr, ptr %1, align 8, !tbaa !14
  %16 = tail call i32 %14(ptr noundef %15) #1
  %17 = load ptr, ptr %6, align 8, !tbaa !15
  %18 = load ptr, ptr %1, align 8, !tbaa !14
  %19 = tail call i32 %17(ptr noundef %18) #1
  %20 = mul nsw i32 %19, %.021
  %21 = add nsw i32 %20, %16
  %22 = load i32, ptr %0, align 8, !tbaa !5
  %23 = srem i32 %21, %22
  %24 = load ptr, ptr %7, align 8, !tbaa !16
  %25 = sext i32 %23 to i64
  %26 = getelementptr inbounds ptr, ptr %24, i64 %25
  %27 = load ptr, ptr %26, align 8, !tbaa !14
  %28 = icmp eq ptr %27, null
  br i1 %28, label %.loopexit, label %29

29:                                               ; preds = %13
  %30 = load ptr, ptr %8, align 8, !tbaa !17
  %31 = load ptr, ptr %1, align 8, !tbaa !14
  %32 = tail call i32 %30(ptr noundef nonnull %27, ptr noundef %31) #1
  %.not = icmp eq i32 %32, 0
  br i1 %.not, label %9, label %33

33:                                               ; preds = %29
  %34 = load ptr, ptr %7, align 8, !tbaa !16
  %35 = getelementptr inbounds ptr, ptr %34, i64 %25
  %36 = load ptr, ptr %35, align 8, !tbaa !14
  store ptr %36, ptr %1, align 8, !tbaa !14
  br label %.loopexit

.loopexit:                                        ; preds = %13, %9, %2, %33
  %.018 = phi i32 [ 0, %33 ], [ -1, %2 ], [ -1, %9 ], [ -1, %13 ]
  ret i32 %.018
}

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 = { 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 = !{!"OHTbl_", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !10, i64 32, !10, i64 40, !7, i64 48, !10, i64 56}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!6, !10, i64 16}
!14 = !{!10, !10, i64 0}
!15 = !{!6, !10, i64 24}
!16 = !{!6, !10, i64 56}
!17 = !{!6, !10, i64 32}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass