; LLVM IR from Dimandragon/non-parametric-dsp :: alglib-cpp/src/ap.ll (ZN11alglib_impl8rmaxabsvElPKNS_9ae_vectorEPNS_8ae_stateE)

; 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.alglib_impl::ae_vector" = type { i64, i64, i8, %"struct.alglib_impl::ae_dyn_block", %union.anon.0 }
%"struct.alglib_impl::ae_dyn_block" = type { ptr, ptr, ptr, ptr }
%union.anon.0 = type { ptr }

; 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 nounwind uwtable
declare dso_local noundef double @_ZN11alglib_impl7ae_fabsEdPNS_8ae_stateE(double noundef, ptr noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_ZN11alglib_impl8rmaxabsvElPKNS_9ae_vectorEPNS_8ae_stateE(i64 noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca double, align 8
  %9 = alloca double, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %10 = load i64, ptr %4, align 8, !tbaa !5
  %11 = icmp sge i64 %10, 16
  br i1 %11, label %12, label %13

12:                                               ; preds = %3
  br label %13

13:                                               ; preds = %12, %3
  store double 0.000000e+00, ptr %9, align 8, !tbaa !11
  store i64 0, ptr %7, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %34, %13
  %15 = load i64, ptr %7, align 8, !tbaa !5
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = sub nsw i64 %16, 1
  %18 = icmp sle i64 %15, %17
  br i1 %18, label %19, label %37

19:                                               ; preds = %14
  %20 = load ptr, ptr %5, align 8, !tbaa !9
  %21 = getelementptr inbounds %"struct.alglib_impl::ae_vector", ptr %20, i32 0, i32 4
  %22 = load ptr, ptr %21, align 8, !tbaa !13
  %23 = load i64, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds double, ptr %22, i64 %23
  %25 = load double, ptr %24, align 8, !tbaa !11
  %26 = load ptr, ptr %6, align 8, !tbaa !9
  %27 = call noundef double @_ZN11alglib_impl7ae_fabsEdPNS_8ae_stateE(double noundef %25, ptr noundef %26)
  store double %27, ptr %8, align 8, !tbaa !11
  %28 = load double, ptr %8, align 8, !tbaa !11
  %29 = load double, ptr %9, align 8, !tbaa !11
  %30 = fcmp ogt double %28, %29
  br i1 %30, label %31, label %33

31:                                               ; preds = %19
  %32 = load double, ptr %8, align 8, !tbaa !11
  store double %32, ptr %9, align 8, !tbaa !11
  br label %33

33:                                               ; preds = %31, %19
  br label %34

34:                                               ; preds = %33
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = add nsw i64 %35, 1
  store i64 %36, ptr %7, align 8, !tbaa !5
  br label %14, !llvm.loop !14

37:                                               ; preds = %14
  %38 = load double, ptr %9, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret double %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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 nounwind uwtable
declare dso_local noundef double @_ZN11alglib_impl7ae_fabsEdPNS_8ae_stateE(double noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_ZN11alglib_impl8rmaxabsvElPKNS_9ae_vectorEPNS_8ae_stateE(i64 noundef %0, ptr nocapture noundef readonly %1, ptr noundef %2) local_unnamed_addr #0 {
  %.not.not12 = icmp sgt i64 %0, 0
  br i1 %.not.not12, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %4 = getelementptr inbounds i8, ptr %1, i64 56
  br label %5

5:                                                ; preds = %.lr.ph, %5
  %.014 = phi double [ 0.000000e+00, %.lr.ph ], [ %.1, %5 ]
  %.01013 = phi i64 [ 0, %.lr.ph ], [ %11, %5 ]
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = getelementptr inbounds double, ptr %6, i64 %.01013
  %8 = load double, ptr %7, align 8, !tbaa !8
  %9 = tail call noundef double @_ZN11alglib_impl7ae_fabsEdPNS_8ae_stateE(double noundef %8, ptr noundef %2)
  %10 = fcmp ogt double %9, %.014
  %.1 = select i1 %10, double %9, double %.014
  %11 = add nuw nsw i64 %.01013, 1
  %exitcond.not = icmp eq i64 %11, %0
  br i1 %exitcond.not, label %._crit_edge, label %5, !llvm.loop !10

._crit_edge:                                      ; preds = %5, %3
  %.0.lcssa = phi double [ 0.000000e+00, %3 ], [ %.1, %5 ]
  ret double %.0.lcssa
}

attributes #0 = { mustprogress 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" }

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


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