; LLVM IR from LeoVen/C-Macro-Collections :: examples (callbacks)

; 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.buffer = type { [100 x i32], i64, i32, ptr, ptr, ptr }
%struct.buffer_fval = type { ptr, ptr, ptr, ptr, ptr, 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 zeroext i1 @b_equals(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  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 = getelementptr inbounds %struct.buffer, ptr %8, i32 0, i32 2
  store i32 0, ptr %9, align 8, !tbaa !9
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.buffer, ptr %10, i32 0, i32 2
  store i32 0, ptr %11, align 8, !tbaa !9
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.buffer, ptr %12, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !13
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.buffer, ptr %15, i32 0, i32 1
  %17 = load i64, ptr %16, align 8, !tbaa !13
  %18 = icmp ne i64 %14, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %2
  store i1 false, ptr %3, align 1
  br label %54

20:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !14
  br label %21

21:                                               ; preds = %48, %20
  %22 = load i64, ptr %6, align 8, !tbaa !14
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.buffer, ptr %23, i32 0, i32 1
  %25 = load i64, ptr %24, align 8, !tbaa !13
  %26 = icmp ult i64 %22, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %21
  store i32 2, ptr %7, align 4
  br label %51

28:                                               ; preds = %21
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.buffer, ptr %29, i32 0, i32 3
  %31 = load ptr, ptr %30, align 8, !tbaa !15
  %32 = getelementptr inbounds %struct.buffer_fval, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !16
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.buffer, ptr %34, i32 0, i32 0
  %36 = load i64, ptr %6, align 8, !tbaa !14
  %37 = getelementptr inbounds [100 x i32], ptr %35, i64 0, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !18
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = getelementptr inbounds %struct.buffer, ptr %39, i32 0, i32 0
  %41 = load i64, ptr %6, align 8, !tbaa !14
  %42 = getelementptr inbounds [100 x i32], ptr %40, i64 0, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !18
  %44 = call i32 %33(i32 noundef %38, i32 noundef %43)
  %45 = icmp ne i32 0, %44
  br i1 %45, label %46, label %47

46:                                               ; preds = %28
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %51

47:                                               ; preds = %28
  br label %48

48:                                               ; preds = %47
  %49 = load i64, ptr %6, align 8, !tbaa !14
  %50 = add i64 %49, 1
  store i64 %50, ptr %6, align 8, !tbaa !14
  br label %21, !llvm.loop !19

51:                                               ; preds = %46, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %52 = load i32, ptr %7, align 4
  switch i32 %52, label %56 [
    i32 2, label %53
    i32 1, label %54
  ]

53:                                               ; preds = %51
  store i1 true, ptr %3, align 1
  br label %54

54:                                               ; preds = %53, %51, %19
  %55 = load i1, ptr %3, align 1
  ret i1 %55

56:                                               ; preds = %51
  unreachable
}

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, !12, i64 408}
!10 = !{!"buffer", !7, i64 0, !11, i64 400, !12, i64 408, !6, i64 416, !6, i64 424, !6, i64 432}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !11, i64 400}
!14 = !{!11, !11, i64 0}
!15 = !{!10, !6, i64 416}
!16 = !{!17, !6, i64 0}
!17 = !{!"buffer_fval", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40}
!18 = !{!12, !12, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"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 noundef zeroext i1 @b_equals(ptr nocapture noundef %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 408
  store i32 0, ptr %3, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %1, i64 408
  store i32 0, ptr %4, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 400
  %6 = load i64, ptr %5, align 8, !tbaa !12
  %7 = getelementptr inbounds i8, ptr %1, i64 400
  %8 = load i64, ptr %7, align 8, !tbaa !12
  %.not = icmp eq i64 %6, %8
  br i1 %.not, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %2
  %9 = getelementptr inbounds i8, ptr %0, i64 416
  %10 = icmp eq i64 %6, 0
  br i1 %10, label %.loopexit, label %.lr.ph

11:                                               ; preds = %.lr.ph
  %12 = add nuw i64 %.01316, 1
  %13 = load i64, ptr %5, align 8, !tbaa !12
  %.not19 = icmp ult i64 %12, %13
  br i1 %.not19, label %.lr.ph, label %.loopexit, !llvm.loop !13

.lr.ph:                                           ; preds = %.preheader, %11
  %.01316 = phi i64 [ %12, %11 ], [ 0, %.preheader ]
  %14 = load ptr, ptr %9, align 8, !tbaa !15
  %15 = load ptr, ptr %14, align 8, !tbaa !16
  %16 = getelementptr inbounds [100 x i32], ptr %0, i64 0, i64 %.01316
  %17 = load i32, ptr %16, align 4, !tbaa !18
  %18 = getelementptr inbounds [100 x i32], ptr %1, i64 0, i64 %.01316
  %19 = load i32, ptr %18, align 4, !tbaa !18
  %20 = tail call i32 %15(i32 noundef %17, i32 noundef %19) #1
  %.not15 = icmp eq i32 %20, 0
  br i1 %.not15, label %11, label %.loopexit

.loopexit:                                        ; preds = %.lr.ph, %11, %.preheader, %2
  %.1 = phi i1 [ false, %2 ], [ true, %.preheader ], [ %.not15, %11 ], [ %.not15, %.lr.ph ]
  ret i1 %.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 = { 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, !10, i64 408}
!6 = !{!"buffer", !7, i64 0, !9, i64 400, !10, i64 408, !11, i64 416, !11, i64 424, !11, i64 432}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"long", !7, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!"any pointer", !7, i64 0}
!12 = !{!6, !9, i64 400}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!6, !11, i64 416}
!16 = !{!17, !11, i64 0}
!17 = !{!"buffer_fval", !11, i64 0, !11, i64 8, !11, i64 16, !11, i64 24, !11, i64 32, !11, i64 40}
!18 = !{!10, !10, i64 0}


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