; LLVM IR from freakout42/macrocalc :: mc/mex (word)

; 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"

@lmargin = external global i32, align 4
@tabsize = external global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @do_margin() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 1, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr @lmargin, align 4, !tbaa !5
  %4 = load i32, ptr @tabsize, align 4, !tbaa !5
  %5 = sdiv i32 %3, %4
  store i32 %5, ptr %1, align 4, !tbaa !5
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = icmp ne i32 %6, 0
  br i1 %7, label %8, label %11

8:                                                ; preds = %0
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = call i32 @linsert(i32 noundef %9, i32 noundef 9, i32 noundef 0)
  store i32 %10, ptr %2, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %8, %0
  %12 = load i32, ptr @lmargin, align 4, !tbaa !5
  %13 = load i32, ptr @tabsize, align 4, !tbaa !5
  %14 = srem i32 %12, %13
  store i32 %14, ptr %1, align 4, !tbaa !5
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = icmp eq i32 %15, 1
  br i1 %16, label %17, label %23

17:                                               ; preds = %11
  %18 = load i32, ptr %1, align 4, !tbaa !5
  %19 = icmp ne i32 %18, 0
  br i1 %19, label %20, label %23

20:                                               ; preds = %17
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = call i32 @linsert(i32 noundef %21, i32 noundef 32, i32 noundef 0)
  store i32 %22, ptr %2, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %20, %17, %11
  %24 = load i32, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret i32 %24
}

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

declare i32 @linsert(i32 noundef, i32 noundef, i32 noundef) #2

; 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 = { "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 #3 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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"

@lmargin = external local_unnamed_addr global i32, align 4
@tabsize = external local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local i32 @do_margin() local_unnamed_addr #0 {
  %1 = load i32, ptr @lmargin, align 4, !tbaa !5
  %2 = load i32, ptr @tabsize, align 4, !tbaa !5
  %3 = sdiv i32 %1, %2
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %6, label %4

4:                                                ; preds = %0
  %5 = tail call i32 @linsert(i32 noundef %3, i32 noundef 9, i32 noundef 0) #2
  %.pre = load i32, ptr @lmargin, align 4, !tbaa !5
  %.pre9 = load i32, ptr @tabsize, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %4, %0
  %7 = phi i32 [ %.pre9, %4 ], [ %2, %0 ]
  %8 = phi i32 [ %.pre, %4 ], [ %1, %0 ]
  %.0 = phi i32 [ %5, %4 ], [ 1, %0 ]
  %9 = srem i32 %8, %7
  %10 = icmp eq i32 %.0, 1
  %11 = icmp ne i32 %9, 0
  %or.cond = select i1 %10, i1 %11, i1 false
  br i1 %or.cond, label %12, label %14

12:                                               ; preds = %6
  %13 = tail call i32 @linsert(i32 noundef %9, i32 noundef 32, i32 noundef 0) #2
  br label %14

14:                                               ; preds = %12, %6
  %.1 = phi i32 [ %13, %12 ], [ %.0, %6 ]
  ret i32 %.1
}

declare i32 @linsert(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #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 = { "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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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