; 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.cmc_alloc_node = type { ptr, ptr, ptr, ptr }
%struct.int_list = type { ptr, i64, i64, i32, ptr, ptr }

@cmc_alloc_node_default = external hidden global %struct.cmc_alloc_node, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @intl_new_custom(i64 noundef %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store i64 %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !9
  %12 = load ptr, ptr %9, align 8, !tbaa !9
  %13 = load i64, ptr %6, align 8, !tbaa !5
  %14 = icmp ult i64 %13, 1
  br i1 %14, label %15, label %16

15:                                               ; preds = %4
  store ptr null, ptr %5, align 8
  br label %61

16:                                               ; preds = %4
  %17 = load ptr, ptr %8, align 8, !tbaa !9
  %18 = icmp ne ptr %17, null
  br i1 %18, label %20, label %19

19:                                               ; preds = %16
  store ptr @cmc_alloc_node_default, ptr %8, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %19, %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %21 = load ptr, ptr %8, align 8, !tbaa !9
  %22 = getelementptr inbounds %struct.cmc_alloc_node, ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !11
  %24 = call ptr %23(i64 noundef 48)
  store ptr %24, ptr %10, align 8, !tbaa !9
  %25 = load ptr, ptr %10, align 8, !tbaa !9
  %26 = icmp ne ptr %25, null
  br i1 %26, label %28, label %27

27:                                               ; preds = %20
  store ptr null, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %60

28:                                               ; preds = %20
  %29 = load ptr, ptr %8, align 8, !tbaa !9
  %30 = getelementptr inbounds %struct.cmc_alloc_node, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !13
  %32 = load i64, ptr %6, align 8, !tbaa !5
  %33 = call ptr %31(i64 noundef %32, i64 noundef 4)
  %34 = load ptr, ptr %10, align 8, !tbaa !9
  %35 = getelementptr inbounds %struct.int_list, ptr %34, i32 0, i32 0
  store ptr %33, ptr %35, align 8, !tbaa !14
  %36 = load ptr, ptr %10, align 8, !tbaa !9
  %37 = getelementptr inbounds %struct.int_list, ptr %36, i32 0, i32 0
  %38 = load ptr, ptr %37, align 8, !tbaa !14
  %39 = icmp ne ptr %38, null
  br i1 %39, label %45, label %40

40:                                               ; preds = %28
  %41 = load ptr, ptr %8, align 8, !tbaa !9
  %42 = getelementptr inbounds %struct.cmc_alloc_node, ptr %41, i32 0, i32 3
  %43 = load ptr, ptr %42, align 8, !tbaa !17
  %44 = load ptr, ptr %10, align 8, !tbaa !9
  call void %43(ptr noundef %44)
  store ptr null, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %60

45:                                               ; preds = %28
  %46 = load i64, ptr %6, align 8, !tbaa !5
  %47 = load ptr, ptr %10, align 8, !tbaa !9
  %48 = getelementptr inbounds %struct.int_list, ptr %47, i32 0, i32 1
  store i64 %46, ptr %48, align 8, !tbaa !18
  %49 = load ptr, ptr %10, align 8, !tbaa !9
  %50 = getelementptr inbounds %struct.int_list, ptr %49, i32 0, i32 2
  store i64 0, ptr %50, align 8, !tbaa !19
  %51 = load ptr, ptr %10, align 8, !tbaa !9
  %52 = getelementptr inbounds %struct.int_list, ptr %51, i32 0, i32 3
  store i32 0, ptr %52, align 8, !tbaa !20
  %53 = load ptr, ptr %7, align 8, !tbaa !9
  %54 = load ptr, ptr %10, align 8, !tbaa !9
  %55 = getelementptr inbounds %struct.int_list, ptr %54, i32 0, i32 4
  store ptr %53, ptr %55, align 8, !tbaa !21
  %56 = load ptr, ptr %8, align 8, !tbaa !9
  %57 = load ptr, ptr %10, align 8, !tbaa !9
  %58 = getelementptr inbounds %struct.int_list, ptr %57, i32 0, i32 5
  store ptr %56, ptr %58, align 8, !tbaa !22
  %59 = load ptr, ptr %10, align 8, !tbaa !9
  store ptr %59, ptr %5, align 8
  store i32 1, ptr %11, align 4
  br label %60

60:                                               ; preds = %45, %40, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  br label %61

61:                                               ; preds = %60, %15
  %62 = load ptr, ptr %5, align 8
  ret ptr %62
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"cmc_alloc_node", !10, i64 0, !10, i64 8, !10, i64 16, !10, i64 24}
!13 = !{!12, !10, i64 8}
!14 = !{!15, !10, i64 0}
!15 = !{!"int_list", !10, i64 0, !6, i64 8, !6, i64 16, !16, i64 24, !10, i64 32, !10, i64 40}
!16 = !{!"int", !7, i64 0}
!17 = !{!12, !10, i64 24}
!18 = !{!15, !6, i64 8}
!19 = !{!15, !6, i64 16}
!20 = !{!15, !16, i64 24}
!21 = !{!15, !10, i64 32}
!22 = !{!15, !10, i64 40}


; 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"

%struct.cmc_alloc_node = type { ptr, ptr, ptr, ptr }

@cmc_alloc_node_default = external hidden global %struct.cmc_alloc_node, align 8

; Function Attrs: nounwind uwtable
define dso_local ptr @intl_new_custom(i64 noundef %0, ptr noundef %1, ptr noundef %2, ptr nocapture noundef readnone %3) local_unnamed_addr #0 {
  %5 = icmp eq i64 %0, 0
  br i1 %5, label %22, label %6

6:                                                ; preds = %4
  %.not = icmp eq ptr %2, null
  %spec.store.select = select i1 %.not, ptr @cmc_alloc_node_default, ptr %2
  %7 = load ptr, ptr %spec.store.select, align 8, !tbaa !5
  %8 = tail call ptr %7(i64 noundef 48) #1
  %.not22 = icmp eq ptr %8, null
  br i1 %.not22, label %22, label %9

9:                                                ; preds = %6
  %10 = getelementptr inbounds i8, ptr %spec.store.select, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !10
  %12 = tail call ptr %11(i64 noundef %0, i64 noundef 4) #1
  store ptr %12, ptr %8, align 8, !tbaa !11
  %.not23 = icmp eq ptr %12, null
  br i1 %.not23, label %13, label %16

13:                                               ; preds = %9
  %14 = getelementptr inbounds i8, ptr %spec.store.select, i64 24
  %15 = load ptr, ptr %14, align 8, !tbaa !15
  tail call void %15(ptr noundef nonnull %8) #1
  br label %22

16:                                               ; preds = %9
  %17 = getelementptr inbounds i8, ptr %8, i64 8
  store i64 %0, ptr %17, align 8, !tbaa !16
  %18 = getelementptr inbounds i8, ptr %8, i64 16
  store i64 0, ptr %18, align 8, !tbaa !17
  %19 = getelementptr inbounds i8, ptr %8, i64 24
  store i32 0, ptr %19, align 8, !tbaa !18
  %20 = getelementptr inbounds i8, ptr %8, i64 32
  store ptr %1, ptr %20, align 8, !tbaa !19
  %21 = getelementptr inbounds i8, ptr %8, i64 40
  store ptr %spec.store.select, ptr %21, align 8, !tbaa !20
  br label %22

22:                                               ; preds = %13, %16, %6, %4
  %.1 = phi ptr [ null, %4 ], [ %8, %16 ], [ null, %13 ], [ null, %6 ]
  ret ptr %.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, !7, i64 0}
!6 = !{!"cmc_alloc_node", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{!12, !7, i64 0}
!12 = !{!"int_list", !7, i64 0, !13, i64 8, !13, i64 16, !14, i64 24, !7, i64 32, !7, i64 40}
!13 = !{!"long", !8, i64 0}
!14 = !{!"int", !8, i64 0}
!15 = !{!6, !7, i64 24}
!16 = !{!12, !13, i64 8}
!17 = !{!12, !13, i64 16}
!18 = !{!12, !14, i64 24}
!19 = !{!12, !7, i64 32}
!20 = !{!12, !7, i64 40}


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