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

; 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"

@.str.16 = external hidden unnamed_addr constant [8 x i8], align 1
@firstflat = external dso_local global i32, align 4
@.str.17 = external hidden unnamed_addr constant [6 x i8], align 1
@lastflat = external dso_local global i32, align 4
@numflats = external dso_local global i32, align 4
@flattranslation = external dso_local global ptr, align 8

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

declare ptr @Z_Malloc(i32 noundef, i32 noundef, ptr noundef) #1

declare i32 @W_GetNumForName(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @R_InitFlats() #2 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %2 = call i32 @W_GetNumForName(ptr noundef @.str.16)
  %3 = add nsw i32 %2, 1
  store i32 %3, ptr @firstflat, align 4, !tbaa !5
  %4 = call i32 @W_GetNumForName(ptr noundef @.str.17)
  %5 = sub nsw i32 %4, 1
  store i32 %5, ptr @lastflat, align 4, !tbaa !5
  %6 = load i32, ptr @lastflat, align 4, !tbaa !5
  %7 = load i32, ptr @firstflat, align 4, !tbaa !5
  %8 = sub nsw i32 %6, %7
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr @numflats, align 4, !tbaa !5
  %10 = load i32, ptr @numflats, align 4, !tbaa !5
  %11 = add nsw i32 %10, 1
  %12 = sext i32 %11 to i64
  %13 = mul i64 %12, 4
  %14 = trunc i64 %13 to i32
  %15 = call ptr @Z_Malloc(i32 noundef %14, i32 noundef 1, ptr noundef null)
  store ptr %15, ptr @flattranslation, align 8, !tbaa !9
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %26, %0
  %17 = load i32, ptr %1, align 4, !tbaa !5
  %18 = load i32, ptr @numflats, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %29

20:                                               ; preds = %16
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = load ptr, ptr @flattranslation, align 8, !tbaa !9
  %23 = load i32, ptr %1, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  store i32 %21, ptr %25, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %20
  %27 = load i32, ptr %1, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %1, align 4, !tbaa !5
  br label %16, !llvm.loop !11

29:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 #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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

@.str.16 = external hidden unnamed_addr constant [8 x i8], align 1
@firstflat = external dso_local local_unnamed_addr global i32, align 4
@.str.17 = external hidden unnamed_addr constant [6 x i8], align 1
@lastflat = external dso_local local_unnamed_addr global i32, align 4
@numflats = external dso_local local_unnamed_addr global i32, align 4
@flattranslation = external dso_local local_unnamed_addr global ptr, align 8

declare ptr @Z_Malloc(i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

declare i32 @W_GetNumForName(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @R_InitFlats() local_unnamed_addr #1 {
  %1 = tail call i32 @W_GetNumForName(ptr noundef nonnull @.str.16) #2
  %2 = add nsw i32 %1, 1
  store i32 %2, ptr @firstflat, align 4, !tbaa !5
  %3 = tail call i32 @W_GetNumForName(ptr noundef nonnull @.str.17) #2
  %4 = add nsw i32 %3, -1
  store i32 %4, ptr @lastflat, align 4, !tbaa !5
  %5 = load i32, ptr @firstflat, align 4, !tbaa !5
  %6 = sub nsw i32 %4, %5
  %7 = add nsw i32 %6, 1
  store i32 %7, ptr @numflats, align 4, !tbaa !5
  %8 = shl i32 %6, 2
  %9 = add i32 %8, 8
  %10 = tail call ptr @Z_Malloc(i32 noundef %9, i32 noundef 1, ptr noundef null) #2
  store ptr %10, ptr @flattranslation, align 8, !tbaa !9
  %11 = load i32, ptr @numflats, align 4, !tbaa !5
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %0, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
  %13 = getelementptr inbounds i32, ptr %10, i64 %indvars.iv
  %14 = trunc nuw nsw i64 %indvars.iv to i32
  store i32 %14, ptr %13, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %15 = load i32, ptr @numflats, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = icmp slt i64 %indvars.iv.next, %16
  br i1 %17, label %.lr.ph, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %0
  ret void
}

attributes #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 = { 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 #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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass