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

; 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"

@french_shiftxform = external dso_local constant [128 x i8], align 16
@shiftxform = external dso_local global ptr, align 8
@.str.147 = external hidden unnamed_addr constant [10 x i8], align 1
@hu_font = external dso_local global [63 x ptr], align 16

; Function Attrs: nounwind uwtable
define dso_local void @HU_Init() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca [9 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 9, ptr %3) #4
  store ptr @french_shiftxform, ptr @shiftxform, align 8, !tbaa !5
  store i32 33, ptr %2, align 4, !tbaa !9
  store i32 0, ptr %1, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %17, %0
  %5 = load i32, ptr %1, align 4, !tbaa !9
  %6 = icmp slt i32 %5, 63
  br i1 %6, label %7, label %20

7:                                                ; preds = %4
  %8 = getelementptr inbounds [9 x i8], ptr %3, i64 0, i64 0
  %9 = load i32, ptr %2, align 4, !tbaa !9
  %10 = add nsw i32 %9, 1
  store i32 %10, ptr %2, align 4, !tbaa !9
  %11 = call i32 (ptr, ptr, ...) @sprintf(ptr noundef %8, ptr noundef @.str.147, i32 noundef %9) #4
  %12 = getelementptr inbounds [9 x i8], ptr %3, i64 0, i64 0
  %13 = call ptr @W_CacheLumpName(ptr noundef %12, i32 noundef 1)
  %14 = load i32, ptr %1, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [63 x ptr], ptr @hu_font, i64 0, i64 %15
  store ptr %13, ptr %16, align 8, !tbaa !5
  br label %17

17:                                               ; preds = %7
  %18 = load i32, ptr %1, align 4, !tbaa !9
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %1, align 4, !tbaa !9
  br label %4, !llvm.loop !11

20:                                               ; preds = %4
  call void @llvm.lifetime.end.p0(i64 9, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  ret void
}

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

; Function Attrs: nounwind
declare i32 @sprintf(ptr noundef, ptr noundef, ...) #2

declare ptr @W_CacheLumpName(ptr noundef, i32 noundef) #3

; 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 = { nounwind "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 = { "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 #4 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@french_shiftxform = external dso_local constant [128 x i8], align 16
@shiftxform = external dso_local local_unnamed_addr global ptr, align 8
@.str.147 = external hidden unnamed_addr constant [10 x i8], align 1
@hu_font = external dso_local local_unnamed_addr global [63 x ptr], align 16

; Function Attrs: nounwind uwtable
define dso_local void @HU_Init() local_unnamed_addr #0 {
  %1 = alloca [9 x i8], align 1
  call void @llvm.lifetime.start.p0(i64 9, ptr nonnull %1) #4
  store ptr @french_shiftxform, ptr @shiftxform, align 8, !tbaa !5
  br label %2

2:                                                ; preds = %0, %2
  %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %2 ]
  %.06 = phi i32 [ 33, %0 ], [ %3, %2 ]
  %3 = add nuw nsw i32 %.06, 1
  %4 = call i32 (ptr, ptr, ...) @sprintf(ptr noundef nonnull dereferenceable(1) %1, ptr noundef nonnull dereferenceable(1) @.str.147, i32 noundef %.06) #4
  %5 = call ptr @W_CacheLumpName(ptr noundef nonnull %1, i32 noundef 1) #4
  %6 = getelementptr inbounds [63 x ptr], ptr @hu_font, i64 0, i64 %indvars.iv
  store ptr %5, ptr %6, align 8, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, 63
  br i1 %exitcond.not, label %7, label %2, !llvm.loop !9

7:                                                ; preds = %2
  call void @llvm.lifetime.end.p0(i64 9, ptr nonnull %1) #4
  ret void
}

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

; Function Attrs: nofree nounwind
declare noundef i32 @sprintf(ptr noalias nocapture noundef writeonly, ptr nocapture noundef readonly, ...) local_unnamed_addr #2

declare ptr @W_CacheLumpName(ptr noundef, i32 noundef) local_unnamed_addr #3

; Function Attrs: mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 = { "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 #4 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,SimplifyCFGPass