; LLVM IR from ERGO-Code/HiGHS :: src/ipm/ipx/utils.ll (ZN3ipx10FindMaxAbsERKSt8valarrayIdE)

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3absd(double noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt8valarrayIdE4sizeEv(ptr noundef nonnull align 8 dereferenceable(16)) #1 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) #1 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN3ipx10FindMaxAbsERKSt8valarrayIdE(ptr noundef nonnull align 8 dereferenceable(16) %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca double, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store double 0.000000e+00, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store i64 0, ptr %4, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  store i64 0, ptr %5, align 8, !tbaa !11
  br label %6

6:                                                ; preds = %28, %1
  %7 = load i64, ptr %5, align 8, !tbaa !11
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = call noundef i64 @_ZNKSt8valarrayIdE4sizeEv(ptr noundef nonnull align 8 dereferenceable(16) %8)
  %10 = icmp ult i64 %7, %9
  br i1 %10, label %12, label %11

11:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %31

12:                                               ; preds = %6
  %13 = load ptr, ptr %2, align 8, !tbaa !5
  %14 = load i64, ptr %5, align 8, !tbaa !11
  %15 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16) %13, i64 noundef %14) #3
  %16 = load double, ptr %15, align 8, !tbaa !9
  %17 = call noundef double @_ZSt3absd(double noundef %16)
  %18 = load double, ptr %3, align 8, !tbaa !9
  %19 = fcmp ogt double %17, %18
  br i1 %19, label %20, label %27

20:                                               ; preds = %12
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = load i64, ptr %5, align 8, !tbaa !11
  %23 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16) %21, i64 noundef %22) #3
  %24 = load double, ptr %23, align 8, !tbaa !9
  %25 = call noundef double @_ZSt3absd(double noundef %24)
  store double %25, ptr %3, align 8, !tbaa !9
  %26 = load i64, ptr %5, align 8, !tbaa !11
  store i64 %26, ptr %4, align 8, !tbaa !11
  br label %27

27:                                               ; preds = %20, %12
  br label %28

28:                                               ; preds = %27
  %29 = load i64, ptr %5, align 8, !tbaa !11
  %30 = add i64 %29, 1
  store i64 %30, ptr %5, align 8, !tbaa !11
  br label %6, !llvm.loop !13

31:                                               ; preds = %11
  %32 = load i64, ptr %4, align 8, !tbaa !11
  %33 = trunc i64 %32 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret i32 %33
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3absd(double noundef) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt8valarrayIdE4sizeEv(ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN3ipx10FindMaxAbsERKSt8valarrayIdE(ptr noundef nonnull align 8 dereferenceable(16) %0) local_unnamed_addr #1 {
  %2 = tail call noundef i64 @_ZNKSt8valarrayIdE4sizeEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

._crit_edge.loopexit:                             ; preds = %12
  %3 = trunc i64 %.1 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %1
  %.09.lcssa = phi i32 [ 0, %1 ], [ %3, %._crit_edge.loopexit ]
  ret i32 %.09.lcssa

.lr.ph:                                           ; preds = %1, %12
  %.014 = phi i64 [ %13, %12 ], [ 0, %1 ]
  %.0913 = phi i64 [ %.1, %12 ], [ 0, %1 ]
  %.01012 = phi double [ %.111, %12 ], [ 0.000000e+00, %1 ]
  %4 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16) %0, i64 noundef %.014) #2
  %5 = load double, ptr %4, align 8, !tbaa !5
  %6 = tail call noundef double @_ZSt3absd(double noundef %5)
  %7 = fcmp ogt double %6, %.01012
  br i1 %7, label %8, label %12

8:                                                ; preds = %.lr.ph
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNKSt8valarrayIdEixEm(ptr noundef nonnull align 8 dereferenceable(16) %0, i64 noundef %.014) #2
  %10 = load double, ptr %9, align 8, !tbaa !5
  %11 = tail call noundef double @_ZSt3absd(double noundef %10)
  br label %12

12:                                               ; preds = %.lr.ph, %8
  %.111 = phi double [ %11, %8 ], [ %.01012, %.lr.ph ]
  %.1 = phi i64 [ %.014, %8 ], [ %.0913, %.lr.ph ]
  %13 = add nuw i64 %.014, 1
  %14 = tail call noundef i64 @_ZNKSt8valarrayIdE4sizeEv(ptr noundef nonnull align 8 dereferenceable(16) %0)
  %15 = icmp ult i64 %13, %14
  br i1 %15, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !9
}

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


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