; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #1

; Function Attrs: nounwind uwtable
define dso_local double @r8mat_amax(i32 noundef %0, i32 noundef %1, ptr noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca double, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %10 = load ptr, ptr %6, align 8, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = mul nsw i32 0, %11
  %13 = add nsw i32 0, %12
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds double, ptr %10, i64 %14
  %16 = load double, ptr %15, align 8, !tbaa !11
  %17 = call double @llvm.fabs.f64(double %16)
  store double %17, ptr %9, align 8, !tbaa !11
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %56, %3
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %22, label %59

22:                                               ; preds = %18
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %52, %22
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %27, label %55

27:                                               ; preds = %23
  %28 = load double, ptr %9, align 8, !tbaa !11
  %29 = load ptr, ptr %6, align 8, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = load i32, ptr %8, align 4, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = mul nsw i32 %31, %32
  %34 = add nsw i32 %30, %33
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds double, ptr %29, i64 %35
  %37 = load double, ptr %36, align 8, !tbaa !11
  %38 = call double @llvm.fabs.f64(double %37)
  %39 = fcmp olt double %28, %38
  br i1 %39, label %40, label %51

40:                                               ; preds = %27
  %41 = load ptr, ptr %6, align 8, !tbaa !9
  %42 = load i32, ptr %7, align 4, !tbaa !5
  %43 = load i32, ptr %8, align 4, !tbaa !5
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = mul nsw i32 %43, %44
  %46 = add nsw i32 %42, %45
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds double, ptr %41, i64 %47
  %49 = load double, ptr %48, align 8, !tbaa !11
  %50 = call double @llvm.fabs.f64(double %49)
  store double %50, ptr %9, align 8, !tbaa !11
  br label %51

51:                                               ; preds = %40, %27
  br label %52

52:                                               ; preds = %51
  %53 = load i32, ptr %7, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %7, align 4, !tbaa !5
  br label %23, !llvm.loop !13

55:                                               ; preds = %23
  br label %56

56:                                               ; preds = %55
  %57 = load i32, ptr %8, align 4, !tbaa !5
  %58 = add nsw i32 %57, 1
  store i32 %58, ptr %8, align 4, !tbaa !5
  br label %18, !llvm.loop !15

59:                                               ; preds = %18
  %60 = load double, ptr %9, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  ret double %60
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"double", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


; 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 nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fabs.f64(double) #0

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local double @r8mat_amax(i32 noundef %0, i32 noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #1 {
  %4 = load double, ptr %2, align 8, !tbaa !5
  %5 = tail call double @llvm.fabs.f64(double %4)
  %6 = icmp sgt i32 %1, 0
  %7 = icmp sgt i32 %0, 0
  %or.cond = and i1 %6, %7
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge25

.preheader.us.preheader:                          ; preds = %3
  %8 = zext nneg i32 %0 to i64
  %wide.trip.count32 = zext nneg i32 %1 to i64
  %xtraiter = and i64 %8, 1
  %9 = icmp eq i32 %0, 1
  %unroll_iter = and i64 %8, 2147483646
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv29 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next30, %._crit_edge.us ]
  %.024.us = phi double [ %5, %.preheader.us.preheader ], [ %.2.us.lcssa, %._crit_edge.us ]
  %10 = mul nuw nsw i64 %indvars.iv29, %8
  %invariant.gep = getelementptr inbounds double, ptr %2, i64 %10
  br i1 %9, label %._crit_edge.us.unr-lcssa, label %.preheader.us.new

.preheader.us.new:                                ; preds = %.preheader.us, %.preheader.us.new
  %indvars.iv = phi i64 [ %indvars.iv.next.1, %.preheader.us.new ], [ 0, %.preheader.us ]
  %.122.us = phi double [ %.2.us.1, %.preheader.us.new ], [ %.024.us, %.preheader.us ]
  %niter = phi i64 [ %niter.next.1, %.preheader.us.new ], [ 0, %.preheader.us ]
  %gep = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv
  %11 = load double, ptr %gep, align 8, !tbaa !5
  %12 = tail call double @llvm.fabs.f64(double %11)
  %13 = fcmp olt double %.122.us, %12
  %.2.us = select i1 %13, double %12, double %.122.us
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %gep.1 = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv.next
  %14 = load double, ptr %gep.1, align 8, !tbaa !5
  %15 = tail call double @llvm.fabs.f64(double %14)
  %16 = fcmp olt double %.2.us, %15
  %.2.us.1 = select i1 %16, double %15, double %.2.us
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.us.unr-lcssa, label %.preheader.us.new, !llvm.loop !9

._crit_edge.us.unr-lcssa:                         ; preds = %.preheader.us.new, %.preheader.us
  %.2.us.lcssa.ph = phi double [ poison, %.preheader.us ], [ %.2.us.1, %.preheader.us.new ]
  %indvars.iv.unr = phi i64 [ 0, %.preheader.us ], [ %indvars.iv.next.1, %.preheader.us.new ]
  %.122.us.unr = phi double [ %.024.us, %.preheader.us ], [ %.2.us.1, %.preheader.us.new ]
  br i1 %lcmp.mod.not, label %._crit_edge.us, label %._crit_edge.us.epilog-lcssa

._crit_edge.us.epilog-lcssa:                      ; preds = %._crit_edge.us.unr-lcssa
  %gep.epil = getelementptr inbounds double, ptr %invariant.gep, i64 %indvars.iv.unr
  %17 = load double, ptr %gep.epil, align 8, !tbaa !5
  %18 = tail call double @llvm.fabs.f64(double %17)
  %19 = fcmp olt double %.122.us.unr, %18
  %.2.us.epil = select i1 %19, double %18, double %.122.us.unr
  br label %._crit_edge.us

._crit_edge.us:                                   ; preds = %._crit_edge.us.unr-lcssa, %._crit_edge.us.epilog-lcssa
  %.2.us.lcssa = phi double [ %.2.us.lcssa.ph, %._crit_edge.us.unr-lcssa ], [ %.2.us.epil, %._crit_edge.us.epilog-lcssa ]
  %indvars.iv.next30 = add nuw nsw i64 %indvars.iv29, 1
  %exitcond33.not = icmp eq i64 %indvars.iv.next30, %wide.trip.count32
  br i1 %exitcond33.not, label %._crit_edge25, label %.preheader.us, !llvm.loop !11

._crit_edge25:                                    ; preds = %._crit_edge.us, %3
  %.0.lcssa = phi double [ %5, %3 ], [ %.2.us.lcssa, %._crit_edge.us ]
  ret double %.0.lcssa
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nofree norecurse nosync nounwind memory(argmem: read) 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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