; LLVM IR from microsoft/vOW4SIKE_on_HW :: SIKE_vOW_hw-sw/ref_c_riscv/SIKE_cryptanalysis/util (Murax)

; 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"

@_heap_start = external global i32, align 4
@.str = external hidden unnamed_addr constant [34 x i8], align 1
@_stack_start = external global i32, align 4

; 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

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

3:                                                ; preds = %8, %0
  %4 = load ptr, ptr %2, align 8, !tbaa !9
  %5 = getelementptr inbounds i32, ptr %4, i32 1
  store ptr %5, ptr %2, align 8, !tbaa !9
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = icmp ne i32 %6, -1412584499
  br i1 %7, label %8, label %11

8:                                                ; preds = %3
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = add i32 %9, 1
  store i32 %10, ptr %1, align 4, !tbaa !5
  br label %3, !llvm.loop !11

11:                                               ; preds = %3
  br label %12

12:                                               ; preds = %17, %11
  %13 = load ptr, ptr %2, align 8, !tbaa !9
  %14 = getelementptr inbounds i32, ptr %13, i32 1
  store ptr %14, ptr %2, align 8, !tbaa !9
  %15 = load i32, ptr %13, align 4, !tbaa !5
  %16 = icmp eq i32 %15, -1412584499
  br i1 %16, label %17, label %18

17:                                               ; preds = %12
  br label %12, !llvm.loop !13

18:                                               ; preds = %12
  %19 = load i32, ptr %1, align 4, !tbaa !5
  %20 = load ptr, ptr %2, align 8, !tbaa !9
  %21 = ptrtoint ptr %20 to i64
  %22 = sub i64 ptrtoint (ptr @_stack_start to i64), %21
  %23 = sdiv exact i64 %22, 4
  %24 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %19, i64 noundef %23)
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret void
}

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { "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"}
!13 = distinct !{!13, !12}


; 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"

@_heap_start = external global i32, align 4
@.str = external hidden unnamed_addr constant [34 x i8], align 1
@_stack_start = external global i32, align 4

; Function Attrs: nofree nounwind uwtable
define dso_local void @report_mem() local_unnamed_addr #0 {
  br label %1

1:                                                ; preds = %1, %0
  %.04 = phi i32 [ 0, %0 ], [ %4, %1 ]
  %.0 = phi ptr [ @_heap_start, %0 ], [ %2, %1 ]
  %2 = getelementptr inbounds i8, ptr %.0, i64 4
  %3 = load i32, ptr %.0, align 4, !tbaa !5
  %.not = icmp eq i32 %3, -1412584499
  %4 = add i32 %.04, 1
  br i1 %.not, label %.preheader, label %1, !llvm.loop !9

.preheader:                                       ; preds = %1, %.preheader
  %.1 = phi ptr [ %5, %.preheader ], [ %2, %1 ]
  %5 = getelementptr inbounds i8, ptr %.1, i64 4
  %6 = load i32, ptr %.1, align 4, !tbaa !5
  %7 = icmp eq i32 %6, -1412584499
  br i1 %7, label %.preheader, label %8, !llvm.loop !11

8:                                                ; preds = %.preheader
  %9 = ptrtoint ptr %5 to i64
  %10 = sub i64 ptrtoint (ptr @_stack_start to i64), %9
  %11 = ashr exact i64 %10, 2
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %.04, i64 noundef %11)
  ret void
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

attributes #0 = { nofree 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 = { 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" }

!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}


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