; LLVM IR from LeoVen/C-Macro-Collections :: examples (sac_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.list = type { [100 x i32], i64, i32, ptr, ptr }

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
define dso_local void @l_init_custom(ptr dead_on_unwind noalias writable sret(%struct.list) align 8 %0, ptr noundef %1, ptr noundef %2, ptr noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store ptr %1, ptr %5, align 8, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !5
  store ptr %3, ptr %7, align 8, !tbaa !5
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 8 %0, i8 0, i64 432, i1 false)
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %12, label %11

11:                                               ; preds = %4
  br label %25

12:                                               ; preds = %4
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %16, label %15

15:                                               ; preds = %12
  store ptr @cmc_alloc_node_default, ptr %6, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %15, %12
  %17 = getelementptr inbounds %struct.list, ptr %0, i32 0, i32 0
  %18 = getelementptr inbounds [100 x i32], ptr %17, i64 0, i64 0
  call void @llvm.memset.p0.i64(ptr align 8 %18, i8 0, i64 400, i1 false)
  %19 = getelementptr inbounds %struct.list, ptr %0, i32 0, i32 1
  store i64 0, ptr %19, align 8, !tbaa !9
  %20 = getelementptr inbounds %struct.list, ptr %0, i32 0, i32 2
  store i32 0, ptr %20, align 8, !tbaa !13
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.list, ptr %0, i32 0, i32 3
  store ptr %21, ptr %22, align 8, !tbaa !14
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.list, ptr %0, i32 0, i32 4
  store ptr %23, ptr %24, align 8, !tbaa !15
  br label %25

25:                                               ; preds = %16, %11
  ret void
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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" }

!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, !11, i64 400}
!10 = !{!"list", !7, i64 0, !11, i64 400, !12, i64 408, !6, i64 416, !6, i64 424}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !12, i64 408}
!14 = !{!10, !6, i64 416}
!15 = !{!10, !6, i64 424}


; 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 }
%struct.list = type { [100 x i32], i64, i32, ptr, ptr }

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

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #0

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @l_init_custom(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.list) align 8 %0, ptr noundef %1, ptr noundef %2, ptr nocapture noundef readnone %3) local_unnamed_addr #1 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(432) %0, i8 0, i64 432, i1 false)
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %8, label %5

5:                                                ; preds = %4
  %.not5 = icmp eq ptr %2, null
  %spec.store.select = select i1 %.not5, ptr @cmc_alloc_node_default, ptr %2
  %6 = getelementptr inbounds i8, ptr %0, i64 416
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(412) %0, i8 0, i64 412, i1 false)
  store ptr %1, ptr %6, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 424
  store ptr %spec.store.select, ptr %7, align 8, !tbaa !12
  br label %8

8:                                                ; preds = %4, %5
  ret void
}

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #1 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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" }

!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 416}
!6 = !{!"list", !7, i64 0, !9, i64 400, !10, i64 408, !11, i64 416, !11, i64 424}
!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, !11, i64 424}


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