; LLVM IR from BrunoLevy/learn-fpga :: FemtoRV/FIRMWARE/EXAMPLES (riscv_logo_2)

; 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 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [19 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @draw_frame(i32 noundef) #0

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

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

; Function Attrs: nounwind uwtable
declare dso_local void @draw_frame_fast(i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @GL_init(i32 noundef -1)
  call void (...) @GL_clear()
  call void (...) @MAX7219_tty_init()
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %34, %0
  %5 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %16, %4
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = icmp slt i32 %7, 50
  br i1 %8, label %10, label %9

9:                                                ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %19

10:                                               ; preds = %6
  %11 = load i32, ptr %1, align 4, !tbaa !5
  call void @draw_frame(i32 noundef %11)
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr %1, align 4, !tbaa !5
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = ashr i32 %14, 4
  store volatile i32 %15, ptr inttoptr (i64 4194308 to ptr), align 4, !tbaa !5
  br label %16

16:                                               ; preds = %10
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %2, align 4, !tbaa !5
  br label %6, !llvm.loop !9

19:                                               ; preds = %9
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %21

21:                                               ; preds = %31, %19
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = icmp slt i32 %22, 300
  br i1 %23, label %25, label %24

24:                                               ; preds = %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  br label %34

25:                                               ; preds = %21
  %26 = load i32, ptr %1, align 4, !tbaa !5
  call void @draw_frame_fast(i32 noundef %26)
  %27 = load i32, ptr %1, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %1, align 4, !tbaa !5
  %29 = load i32, ptr %1, align 4, !tbaa !5
  %30 = ashr i32 %29, 4
  store volatile i32 %30, ptr inttoptr (i64 4194308 to ptr), align 4, !tbaa !5
  br label %31

31:                                               ; preds = %25
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %3, align 4, !tbaa !5
  br label %21, !llvm.loop !11

34:                                               ; preds = %24
  br label %4
}

declare void @GL_init(i32 noundef) #2

declare void @GL_clear(...) #2

declare void @MAX7219_tty_init(...) #2

declare i32 @printf(ptr noundef, ...) #2

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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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 = external hidden unnamed_addr constant [20 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [19 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local void @draw_frame(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @draw_frame_fast(i32 noundef) local_unnamed_addr #0

; Function Attrs: noreturn nounwind uwtable
define dso_local void @main() local_unnamed_addr #1 {
  tail call void @GL_init(i32 noundef -1) #4
  tail call void (...) @GL_clear() #4
  tail call void (...) @MAX7219_tty_init() #4
  br label %.loopexit

.loopexit.loopexit:                               ; preds = %8
  br label %.loopexit, !llvm.loop !5

.loopexit:                                        ; preds = %.loopexit.loopexit, %0
  %.011 = phi i32 [ 0, %0 ], [ %9, %.loopexit.loopexit ]
  %1 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %4

2:                                                ; preds = %4
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  br label %8

4:                                                ; preds = %.loopexit, %4
  %.01013 = phi i32 [ 0, %.loopexit ], [ %7, %4 ]
  %.112 = phi i32 [ %.011, %.loopexit ], [ %5, %4 ]
  tail call void @draw_frame(i32 noundef %.112)
  %5 = add nsw i32 %.112, 1
  %6 = ashr i32 %5, 4
  store volatile i32 %6, ptr inttoptr (i64 4194308 to ptr), align 4, !tbaa !7
  %7 = add nuw nsw i32 %.01013, 1
  %exitcond.not = icmp eq i32 %7, 50
  br i1 %exitcond.not, label %2, label %4, !llvm.loop !11

8:                                                ; preds = %2, %8
  %.015 = phi i32 [ 0, %2 ], [ %11, %8 ]
  %.214 = phi i32 [ %5, %2 ], [ %9, %8 ]
  tail call void @draw_frame_fast(i32 noundef %.214)
  %9 = add nsw i32 %.214, 1
  %10 = ashr i32 %9, 4
  store volatile i32 %10, ptr inttoptr (i64 4194308 to ptr), align 4, !tbaa !7
  %11 = add nuw nsw i32 %.015, 1
  %exitcond17.not = icmp eq i32 %11, 300
  br i1 %exitcond17.not, label %.loopexit.loopexit, label %8, !llvm.loop !5
}

declare void @GL_init(i32 noundef) local_unnamed_addr #2

declare void @GL_clear(...) local_unnamed_addr #2

declare void @MAX7219_tty_init(...) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

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 = { noreturn 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 = { "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 = { 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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass