; 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 }

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @intl_empty(ptr noundef) #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @intl_pop_front(ptr noundef %0) #0 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = call zeroext i1 @intl_empty(ptr noundef %5)
  br i1 %6, label %7, label %10

7:                                                ; preds = %1
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.int_list, ptr %8, i32 0, i32 3
  store i32 2, ptr %9, align 8, !tbaa !9
  store i1 false, ptr %2, align 1
  br label %34

10:                                               ; preds = %1
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.int_list, ptr %11, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !13
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.int_list, ptr %14, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  %17 = getelementptr inbounds i32, ptr %16, i64 1
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.int_list, ptr %18, i32 0, i32 2
  %20 = load i64, ptr %19, align 8, !tbaa !14
  %21 = sub i64 %20, 1
  %22 = mul i64 %21, 4
  call void @llvm.memmove.p0.p0.i64(ptr align 4 %13, ptr align 4 %17, i64 %22, i1 false)
  store i32 0, ptr %4, align 4, !tbaa !15
  %23 = load i32, ptr %4, align 4, !tbaa !15
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.int_list, ptr %24, i32 0, i32 0
  %26 = load ptr, ptr %25, align 8, !tbaa !13
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.int_list, ptr %27, i32 0, i32 2
  %29 = load i64, ptr %28, align 8, !tbaa !14
  %30 = add i64 %29, -1
  store i64 %30, ptr %28, align 8, !tbaa !14
  %31 = getelementptr inbounds i32, ptr %26, i64 %30
  store i32 %23, ptr %31, align 4, !tbaa !15
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.int_list, ptr %32, i32 0, i32 3
  store i32 0, ptr %33, align 8, !tbaa !9
  store i1 true, ptr %2, align 1
  br label %34

34:                                               ; preds = %10, %7
  %35 = load i1, ptr %2, align 1
  ret i1 %35
}

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 nounwind willreturn memory(argmem: readwrite) }

!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 24}
!10 = !{!"int_list", !6, i64 0, !11, i64 8, !11, i64 16, !12, i64 24, !6, i64 32, !6, i64 40}
!11 = !{!"long", !7, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !6, i64 0}
!14 = !{!10, !11, i64 16}
!15 = !{!12, !12, 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
declare dso_local zeroext i1 @intl_empty(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @intl_pop_front(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call zeroext i1 @intl_empty(ptr noundef %0)
  br i1 %2, label %14, label %3

3:                                                ; preds = %1
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %4, i64 4
  %6 = getelementptr inbounds i8, ptr %0, i64 16
  %7 = load i64, ptr %6, align 8, !tbaa !12
  %8 = shl i64 %7, 2
  %9 = add i64 %8, -4
  tail call void @llvm.memmove.p0.p0.i64(ptr align 4 %4, ptr nonnull align 4 %5, i64 %9, i1 false)
  %10 = load ptr, ptr %0, align 8, !tbaa !5
  %11 = load i64, ptr %6, align 8, !tbaa !12
  %12 = add i64 %11, -1
  store i64 %12, ptr %6, align 8, !tbaa !12
  %13 = getelementptr inbounds i32, ptr %10, i64 %12
  store i32 0, ptr %13, align 4, !tbaa !13
  br label %14

14:                                               ; preds = %1, %3
  %.sink = phi i32 [ 0, %3 ], [ 2, %1 ]
  %15 = getelementptr inbounds i8, ptr %0, i64 24
  store i32 %.sink, ptr %15, align 8
  %.0 = xor i1 %2, true
  ret i1 %.0
}

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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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 = !{!"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 16}
!13 = !{!11, !11, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,TailCallElimPass