; LLVM IR from ahampriyanshu/algo-ds-101 :: Algorithms/Cryptography/RSA_Cipher/RSA_cipher.ll (Z15modular_inverseii)

; 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"

%"struct.std::pair" = type { i32, i32 }

; 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: mustprogress uwtable
declare dso_local i64 @_Z15euclid_extendedii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z15modular_inverseii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"struct.std::pair", 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
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = call i64 @_Z15euclid_extendedii(i32 noundef %7, i32 noundef %8)
  store i64 %9, ptr %6, align 4
  %10 = getelementptr inbounds %"struct.std::pair", ptr %6, i32 0, i32 0
  %11 = load i32, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  store i32 %11, ptr %5, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %15, %2
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = icmp slt i32 %13, 0
  br i1 %14, label %15, label %19

15:                                               ; preds = %12
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = add nsw i32 %17, %16
  store i32 %18, ptr %5, align 4, !tbaa !5
  br label %12, !llvm.loop !11

19:                                               ; preds = %12
  %20 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %20
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTSSt4pairIiiE", !6, i64 0, !6, i64 4}
!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"

; Function Attrs: mustprogress uwtable
declare dso_local i64 @_Z15euclid_extendedii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 0, -2147483648) i32 @_Z15modular_inverseii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call i64 @_Z15euclid_extendedii(i32 noundef %0, i32 noundef %1)
  %.sroa.0.0.extract.trunc = trunc i64 %3 to i32
  %smax = tail call i32 @llvm.smax.i32(i32 %.sroa.0.0.extract.trunc, i32 0)
  %.sroa.0.0.extract.trunc.lobit = lshr i32 %.sroa.0.0.extract.trunc, 31
  %4 = add i32 %.sroa.0.0.extract.trunc.lobit, %.sroa.0.0.extract.trunc
  %5 = sub i32 %smax, %4
  %umax = tail call i32 @llvm.umax.i32(i32 %1, i32 1)
  %6 = udiv i32 %5, %umax
  %7 = add i32 %.sroa.0.0.extract.trunc.lobit, %6
  %8 = mul i32 %7, %1
  %9 = add i32 %8, %.sroa.0.0.extract.trunc
  ret i32 %9
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umax.i32(i32, i32) #1

attributes #0 = { mustprogress 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 speculatable willreturn memory(none) }

!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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,SCCPPass,SROAPass,TailCallElimPass