; LLVM IR from trustwallet/wallet-core :: trezor-crypto/crypto (bignum)

; 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"

; 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 i32 @inverse_mod_power_two(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = sub i32 2, %9
  store i32 %10, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sub i32 %11, 1
  store i32 %12, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 32
  br i1 %14, label %15, label %16

15:                                               ; preds = %2
  br label %20

16:                                               ; preds = %2
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = shl i32 1, %17
  %19 = sub i32 %18, 1
  br label %20

20:                                               ; preds = %16, %15
  %21 = phi i32 [ -1, %15 ], [ %19, %16 ]
  store i32 %21, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 1, ptr %8, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %39, %20
  %23 = load i32, ptr %8, align 4, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = icmp ult i32 %23, %24
  br i1 %25, label %27, label %26

26:                                               ; preds = %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %42

27:                                               ; preds = %22
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = mul i32 %28, %29
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = and i32 %30, %31
  store i32 %32, ptr %6, align 4, !tbaa !5
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = add i32 1, %34
  %36 = mul i32 %33, %35
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = and i32 %36, %37
  store i32 %38, ptr %5, align 4, !tbaa !5
  br label %39

39:                                               ; preds = %27
  %40 = load i32, ptr %8, align 4, !tbaa !5
  %41 = shl i32 %40, 1
  store i32 %41, ptr %8, align 4, !tbaa !5
  br label %22, !llvm.loop !9

42:                                               ; preds = %26
  %43 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %43
}

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 = { 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"}


; 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: nofree norecurse nosync nounwind memory(none) uwtable
define dso_local i32 @inverse_mod_power_two(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sub i32 2, %0
  %4 = icmp eq i32 %1, 32
  %notmask = shl nsw i32 -1, %1
  %5 = xor i32 %notmask, -1
  %6 = select i1 %4, i32 -1, i32 %5
  %7 = icmp ugt i32 %1, 1
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %8 = add i32 %0, -1
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.014.lcssa = phi i32 [ %3, %2 ], [ %13, %.lr.ph ]
  ret i32 %.014.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.018 = phi i32 [ %14, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %.01417 = phi i32 [ %13, %.lr.ph ], [ %3, %.lr.ph.preheader ]
  %.01516 = phi i32 [ %10, %.lr.ph ], [ %8, %.lr.ph.preheader ]
  %9 = mul i32 %.01516, %.01516
  %10 = and i32 %9, %6
  %11 = add i32 %10, 1
  %12 = mul i32 %11, %.01417
  %13 = and i32 %12, %6
  %14 = shl i32 %.018, 1
  %15 = icmp ult i32 %14, %1
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !5
}

attributes #0 = { nofree norecurse nosync nounwind memory(none) 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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