; LLVM IR from BrunoLevy/learn-fpga :: LiteX/software/Doom/mc1-doom/src (hu_lib)

; 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.hu_itext_t = type { %struct.hu_textline_t, i32, ptr, i32 }
%struct.hu_textline_t = type { i32, i32, ptr, i32, [81 x i8], i32, i32 }

; Function Attrs: nounwind uwtable
declare dso_local i32 @HUlib_delCharFromTextLine(ptr noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @HUlib_eraseLineFromIText(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  br label %3

3:                                                ; preds = %12, %1
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.hu_itext_t, ptr %4, i32 0, i32 1
  %6 = load i32, ptr %5, align 8, !tbaa !9
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.hu_itext_t, ptr %7, i32 0, i32 0
  %9 = getelementptr inbounds %struct.hu_textline_t, ptr %8, i32 0, i32 5
  %10 = load i32, ptr %9, align 8, !tbaa !13
  %11 = icmp ne i32 %6, %10
  br i1 %11, label %12, label %16

12:                                               ; preds = %3
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.hu_itext_t, ptr %13, i32 0, i32 0
  %15 = call i32 @HUlib_delCharFromTextLine(ptr noundef %14)
  br label %3, !llvm.loop !14

16:                                               ; preds = %3
  ret void
}

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" }

!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 112}
!10 = !{!"", !11, i64 0, !12, i64 112, !6, i64 120, !12, i64 128}
!11 = !{!"", !12, i64 0, !12, i64 4, !6, i64 8, !12, i64 16, !7, i64 20, !12, i64 104, !12, i64 108}
!12 = !{!"int", !7, i64 0}
!13 = !{!10, !12, i64 104}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; 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 i32 @HUlib_delCharFromTextLine(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @HUlib_eraseLineFromIText(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 112
  %3 = getelementptr inbounds i8, ptr %0, i64 104
  %4 = load i32, ptr %2, align 8, !tbaa !5
  %5 = load i32, ptr %3, align 8, !tbaa !12
  %.not3 = icmp eq i32 %4, %5
  br i1 %.not3, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %6 = tail call i32 @HUlib_delCharFromTextLine(ptr noundef nonnull %0)
  %7 = load i32, ptr %2, align 8, !tbaa !5
  %8 = load i32, ptr %3, align 8, !tbaa !12
  %.not = icmp eq i32 %7, %8
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

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" }

!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, !8, i64 112}
!6 = !{!"", !7, i64 0, !8, i64 112, !11, i64 120, !8, i64 128}
!7 = !{!"", !8, i64 0, !8, i64 4, !11, i64 8, !8, i64 16, !9, i64 20, !8, i64 104, !8, i64 108}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!6, !8, i64 104}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass