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

; 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.int_list = type { ptr, i64, i64, i32, ptr, ptr }
%struct.cmc_alloc_node = type { 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 @intl_resize(ptr noundef %0, i64 noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.int_list, ptr %8, i32 0, i32 3
  store i32 0, ptr %9, align 8, !tbaa !11
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.int_list, ptr %10, i32 0, i32 1
  %12 = load i64, ptr %11, align 8, !tbaa !14
  %13 = load i64, ptr %5, align 8, !tbaa !9
  %14 = icmp eq i64 %12, %13
  br i1 %14, label %15, label %16

15:                                               ; preds = %2
  store i1 true, ptr %3, align 1
  br label %50

16:                                               ; preds = %2
  %17 = load i64, ptr %5, align 8, !tbaa !9
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.int_list, ptr %18, i32 0, i32 2
  %20 = load i64, ptr %19, align 8, !tbaa !15
  %21 = icmp ult i64 %17, %20
  br i1 %21, label %22, label %25

22:                                               ; preds = %16
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.int_list, ptr %23, i32 0, i32 3
  store i32 4, ptr %24, align 8, !tbaa !11
  store i1 false, ptr %3, align 1
  br label %50

25:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.int_list, ptr %26, i32 0, i32 5
  %28 = load ptr, ptr %27, align 8, !tbaa !16
  %29 = getelementptr inbounds %struct.cmc_alloc_node, ptr %28, i32 0, i32 2
  %30 = load ptr, ptr %29, align 8, !tbaa !17
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.int_list, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !19
  %34 = load i64, ptr %5, align 8, !tbaa !9
  %35 = mul i64 4, %34
  %36 = call ptr %30(ptr noundef %33, i64 noundef %35)
  store ptr %36, ptr %6, align 8, !tbaa !5
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = icmp ne ptr %37, null
  br i1 %38, label %42, label %39

39:                                               ; preds = %25
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.int_list, ptr %40, i32 0, i32 3
  store i32 1, ptr %41, align 8, !tbaa !11
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %49

42:                                               ; preds = %25
  %43 = load ptr, ptr %6, align 8, !tbaa !5
  %44 = load ptr, ptr %4, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.int_list, ptr %44, i32 0, i32 0
  store ptr %43, ptr %45, align 8, !tbaa !19
  %46 = load i64, ptr %5, align 8, !tbaa !9
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = getelementptr inbounds %struct.int_list, ptr %47, i32 0, i32 1
  store i64 %46, ptr %48, align 8, !tbaa !14
  store i1 true, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %49

49:                                               ; preds = %42, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %50

50:                                               ; preds = %49, %22, %15
  %51 = load i1, ptr %3, align 1
  ret i1 %51
}

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 = !{!"long", !7, i64 0}
!11 = !{!12, !13, i64 24}
!12 = !{!"int_list", !6, i64 0, !10, i64 8, !10, i64 16, !13, i64 24, !6, i64 32, !6, i64 40}
!13 = !{!"int", !7, i64 0}
!14 = !{!12, !10, i64 8}
!15 = !{!12, !10, i64 16}
!16 = !{!12, !6, i64 40}
!17 = !{!18, !6, i64 16}
!18 = !{!"cmc_alloc_node", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24}
!19 = !{!12, !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: nounwind uwtable
define dso_local noundef zeroext i1 @intl_resize(ptr nocapture noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 24
  store i32 0, ptr %3, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load i64, ptr %4, align 8, !tbaa !12
  %6 = icmp eq i64 %5, %1
  br i1 %6, label %22, label %7

7:                                                ; preds = %2
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  %9 = load i64, ptr %8, align 8, !tbaa !13
  %10 = icmp ugt i64 %9, %1
  br i1 %10, label %11, label %12

11:                                               ; preds = %7
  store i32 4, ptr %3, align 8, !tbaa !5
  br label %22

12:                                               ; preds = %7
  %13 = getelementptr inbounds i8, ptr %0, i64 40
  %14 = load ptr, ptr %13, align 8, !tbaa !14
  %15 = getelementptr inbounds i8, ptr %14, i64 16
  %16 = load ptr, ptr %15, align 8, !tbaa !15
  %17 = load ptr, ptr %0, align 8, !tbaa !17
  %18 = shl i64 %1, 2
  %19 = tail call ptr %16(ptr noundef %17, i64 noundef %18) #1
  %.not.not = icmp eq ptr %19, null
  br i1 %.not.not, label %20, label %21

20:                                               ; preds = %12
  store i32 1, ptr %3, align 8, !tbaa !5
  br label %22

21:                                               ; preds = %12
  store ptr %19, ptr %0, align 8, !tbaa !17
  store i64 %1, ptr %4, align 8, !tbaa !12
  br label %22

22:                                               ; preds = %20, %21, %2, %11
  %.1 = phi i1 [ false, %11 ], [ true, %2 ], [ true, %21 ], [ false, %20 ]
  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, !11, i64 24}
!6 = !{!"int_list", !7, i64 0, !10, i64 8, !10, i64 16, !11, i64 24, !7, i64 32, !7, i64 40}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"int", !8, i64 0}
!12 = !{!6, !10, i64 8}
!13 = !{!6, !10, i64 16}
!14 = !{!6, !7, i64 40}
!15 = !{!16, !7, i64 16}
!16 = !{!"cmc_alloc_node", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!17 = !{!6, !7, i64 0}


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