; LLVM IR from Dimandragon/non-parametric-dsp :: alglib-cpp/src/ap.ll (ZN11alglib_impl8rmaxabsrElPKNS_9ae_matrixElPNS_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_matrix" = type { i64, i64, i64, i64, i8, %"struct.alglib_impl::ae_dyn_block", %union.anon }
%"struct.alglib_impl::ae_dyn_block" = type { ptr, ptr, ptr, ptr }
%union.anon = 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_impl8rmaxabsrElPKNS_9ae_matrixElPNS_8ae_stateE(i64 noundef %0, ptr noundef %1, i64 noundef %2, ptr noundef %3) #1 {
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca double, align 8
  %11 = alloca double, align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %12 = load i64, ptr %5, align 8, !tbaa !5
  %13 = icmp sge i64 %12, 16
  br i1 %13, label %14, label %15

14:                                               ; preds = %4
  br label %15

15:                                               ; preds = %14, %4
  store double 0.000000e+00, ptr %11, align 8, !tbaa !11
  store i64 0, ptr %9, align 8, !tbaa !5
  br label %16

16:                                               ; preds = %39, %15
  %17 = load i64, ptr %9, align 8, !tbaa !5
  %18 = load i64, ptr %5, align 8, !tbaa !5
  %19 = sub nsw i64 %18, 1
  %20 = icmp sle i64 %17, %19
  br i1 %20, label %21, label %42

21:                                               ; preds = %16
  %22 = load ptr, ptr %6, align 8, !tbaa !9
  %23 = getelementptr inbounds %"struct.alglib_impl::ae_matrix", ptr %22, i32 0, i32 6
  %24 = load ptr, ptr %23, align 8, !tbaa !13
  %25 = load i64, ptr %7, align 8, !tbaa !5
  %26 = getelementptr inbounds ptr, ptr %24, i64 %25
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  %28 = load i64, ptr %9, align 8, !tbaa !5
  %29 = getelementptr inbounds double, ptr %27, i64 %28
  %30 = load double, ptr %29, align 8, !tbaa !11
  %31 = load ptr, ptr %8, align 8, !tbaa !9
  %32 = call noundef double @_ZN11alglib_impl7ae_fabsEdPNS_8ae_stateE(double noundef %30, ptr noundef %31)
  store double %32, ptr %10, align 8, !tbaa !11
  %33 = load double, ptr %10, align 8, !tbaa !11
  %34 = load double, ptr %11, align 8, !tbaa !11
  %35 = fcmp ogt double %33, %34
  br i1 %35, label %36, label %38

36:                                               ; preds = %21
  %37 = load double, ptr %10, align 8, !tbaa !11
  store double %37, ptr %11, align 8, !tbaa !11
  br label %38

38:                                               ; preds = %36, %21
  br label %39

39:                                               ; preds = %38
  %40 = load i64, ptr %9, align 8, !tbaa !5
  %41 = add nsw i64 %40, 1
  store i64 %41, ptr %9, align 8, !tbaa !5
  br label %16, !llvm.loop !14

42:                                               ; preds = %16
  %43 = load double, ptr %11, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret double %43
}

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_impl8rmaxabsrElPKNS_9ae_matrixElPNS_8ae_stateE(i64 noundef %0, ptr nocapture noundef readonly %1, i64 noundef %2, ptr noundef %3) local_unnamed_addr #0 {
  %.not.not13 = icmp sgt i64 %0, 0
  br i1 %.not.not13, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %4
  %5 = getelementptr inbounds i8, ptr %1, i64 72
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %.015 = phi double [ 0.000000e+00, %.lr.ph ], [ %.1, %6 ]
  %.01114 = phi i64 [ 0, %.lr.ph ], [ %14, %6 ]
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  %8 = getelementptr inbounds ptr, ptr %7, i64 %2
  %9 = load ptr, ptr %8, align 8, !tbaa !8
  %10 = getelementptr inbounds double, ptr %9, i64 %.01114
  %11 = load double, ptr %10, align 8, !tbaa !10
  %12 = tail call noundef double @_ZN11alglib_impl7ae_fabsEdPNS_8ae_stateE(double noundef %11, ptr noundef %3)
  %13 = fcmp ogt double %12, %.015
  %.1 = select i1 %13, double %12, double %.015
  %14 = add nuw nsw i64 %.01114, 1
  %exitcond.not = icmp eq i64 %14, %0
  br i1 %exitcond.not, label %._crit_edge, label %6, !llvm.loop !12

._crit_edge:                                      ; preds = %6, %4
  %.0.lcssa = phi double [ 0.000000e+00, %4 ], [ %.1, %6 ]
  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 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"double", !6, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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