; 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_addCharToTextLine(ptr noundef, i8 noundef signext) #0

; Function Attrs: nounwind uwtable
define dso_local void @HUlib_addPrefixToIText(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %9, %2
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = load i8, ptr %6, align 1, !tbaa !9
  %8 = icmp ne i8 %7, 0
  br i1 %8, label %9, label %16

9:                                                ; preds = %5
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.hu_itext_t, ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds i8, ptr %12, i32 1
  store ptr %13, ptr %4, align 8, !tbaa !5
  %14 = load i8, ptr %12, align 1, !tbaa !9
  %15 = call i32 @HUlib_addCharToTextLine(ptr noundef %11, i8 noundef signext %14)
  br label %5, !llvm.loop !10

16:                                               ; preds = %5
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.hu_itext_t, ptr %17, i32 0, i32 0
  %19 = getelementptr inbounds %struct.hu_textline_t, ptr %18, i32 0, i32 5
  %20 = load i32, ptr %19, align 8, !tbaa !12
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.hu_itext_t, ptr %21, i32 0, i32 1
  store i32 %20, ptr %22, align 8, !tbaa !16
  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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = !{!13, !15, i64 104}
!13 = !{!"", !14, i64 0, !15, i64 112, !6, i64 120, !15, i64 128}
!14 = !{!"", !15, i64 0, !15, i64 4, !6, i64 8, !15, i64 16, !7, i64 20, !15, i64 104, !15, i64 108}
!15 = !{!"int", !7, i64 0}
!16 = !{!13, !15, i64 112}


; 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_addCharToTextLine(ptr noundef, i8 noundef signext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @HUlib_addPrefixToIText(ptr noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %1, align 1, !tbaa !5
  %.not6 = icmp eq i8 %3, 0
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %4 = phi i8 [ %7, %.lr.ph ], [ %3, %2 ]
  %.07 = phi ptr [ %5, %.lr.ph ], [ %1, %2 ]
  %5 = getelementptr inbounds i8, ptr %.07, i64 1
  %6 = tail call i32 @HUlib_addCharToTextLine(ptr noundef %0, i8 noundef signext %4)
  %7 = load i8, ptr %5, align 1, !tbaa !5
  %.not = icmp eq i8 %7, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %2
  %8 = getelementptr inbounds i8, ptr %0, i64 104
  %9 = load i32, ptr %8, align 8, !tbaa !10
  %10 = getelementptr inbounds i8, ptr %0, i64 112
  store i32 %9, ptr %10, align 8, !tbaa !15
  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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!11, !13, i64 104}
!11 = !{!"", !12, i64 0, !13, i64 112, !14, i64 120, !13, i64 128}
!12 = !{!"", !13, i64 0, !13, i64 4, !14, i64 8, !13, i64 16, !6, i64 20, !13, i64 104, !13, i64 108}
!13 = !{!"int", !6, i64 0}
!14 = !{!"any pointer", !6, i64 0}
!15 = !{!11, !13, i64 112}


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