; LLVM IR from simbody/simbody :: SimTKmath/Integrators/src/CPodes/sundials/src/sundials (sundials_dense)

; 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: nounwind uwtable
define dso_local void @denseScale(double noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca double, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca ptr, align 8
  store double %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !11
  store i32 %3, ptr %8, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  store i32 0, ptr %10, align 4, !tbaa !11
  br label %12

12:                                               ; preds = %38, %4
  %13 = load i32, ptr %10, align 4, !tbaa !11
  %14 = load i32, ptr %8, align 4, !tbaa !11
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %16, label %41

16:                                               ; preds = %12
  %17 = load ptr, ptr %6, align 8, !tbaa !9
  %18 = load i32, ptr %10, align 4, !tbaa !11
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds ptr, ptr %17, i64 %19
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  store ptr %21, ptr %11, align 8, !tbaa !9
  store i32 0, ptr %9, align 4, !tbaa !11
  br label %22

22:                                               ; preds = %34, %16
  %23 = load i32, ptr %9, align 4, !tbaa !11
  %24 = load i32, ptr %7, align 4, !tbaa !11
  %25 = icmp slt i32 %23, %24
  br i1 %25, label %26, label %37

26:                                               ; preds = %22
  %27 = load double, ptr %5, align 8, !tbaa !5
  %28 = load ptr, ptr %11, align 8, !tbaa !9
  %29 = load i32, ptr %9, align 4, !tbaa !11
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds double, ptr %28, i64 %30
  %32 = load double, ptr %31, align 8, !tbaa !5
  %33 = fmul double %32, %27
  store double %33, ptr %31, align 8, !tbaa !5
  br label %34

34:                                               ; preds = %26
  %35 = load i32, ptr %9, align 4, !tbaa !11
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %9, align 4, !tbaa !11
  br label %22, !llvm.loop !13

37:                                               ; preds = %22
  br label %38

38:                                               ; preds = %37
  %39 = load i32, ptr %10, align 4, !tbaa !11
  %40 = add nsw i32 %39, 1
  store i32 %40, ptr %10, align 4, !tbaa !11
  br label %12, !llvm.loop !15

41:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @denseScale(double noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %3, 0
  %6 = icmp sgt i32 %2, 0
  %or.cond = and i1 %5, %6
  br i1 %or.cond, label %.lr.ph.us.preheader, label %._crit_edge15

.lr.ph.us.preheader:                              ; preds = %4
  %wide.trip.count21 = zext nneg i32 %3 to i64
  %wide.trip.count = zext nneg i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 4
  %n.vec = and i64 %wide.trip.count, 2147483644
  %broadcast.splatinsert = insertelement <2 x double> poison, double %0, i64 0
  %broadcast.splat = shufflevector <2 x double> %broadcast.splatinsert, <2 x double> poison, <2 x i32> zeroinitializer
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br label %.lr.ph.us

.lr.ph.us:                                        ; preds = %.lr.ph.us.preheader, %._crit_edge.us
  %indvars.iv18 = phi i64 [ 0, %.lr.ph.us.preheader ], [ %indvars.iv.next19, %._crit_edge.us ]
  %7 = getelementptr inbounds ptr, ptr %1, i64 %indvars.iv18
  %8 = load ptr, ptr %7, align 8, !tbaa !5
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.body

vector.body:                                      ; preds = %.lr.ph.us, %vector.body
  %index = phi i64 [ %index.next, %vector.body ], [ 0, %.lr.ph.us ]
  %9 = getelementptr inbounds double, ptr %8, i64 %index
  %10 = getelementptr inbounds i8, ptr %9, i64 16
  %wide.load = load <2 x double>, ptr %9, align 8, !tbaa !9
  %wide.load23 = load <2 x double>, ptr %10, align 8, !tbaa !9
  %11 = fmul <2 x double> %wide.load, %broadcast.splat
  %12 = fmul <2 x double> %wide.load23, %broadcast.splat
  store <2 x double> %11, ptr %9, align 8, !tbaa !9
  store <2 x double> %12, ptr %10, align 8, !tbaa !9
  %index.next = add nuw i64 %index, 4
  %13 = icmp eq i64 %index.next, %n.vec
  br i1 %13, label %middle.block, label %vector.body, !llvm.loop !11

middle.block:                                     ; preds = %vector.body
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %.lr.ph.us
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph.us ], [ %n.vec, %middle.block ]
  br label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %scalar.ph ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %14 = getelementptr inbounds double, ptr %8, i64 %indvars.iv
  %15 = load double, ptr %14, align 8, !tbaa !9
  %16 = fmul double %15, %0
  store double %16, ptr %14, align 8, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.us, label %scalar.ph, !llvm.loop !15

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %indvars.iv.next19 = add nuw nsw i64 %indvars.iv18, 1
  %exitcond22.not = icmp eq i64 %indvars.iv.next19, %wide.trip.count21
  br i1 %exitcond22.not, label %._crit_edge15, label %.lr.ph.us, !llvm.loop !16

._crit_edge15:                                    ; preds = %._crit_edge.us, %4
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = distinct !{!11, !12, !13, !14}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!"llvm.loop.isvectorized", i32 1}
!14 = !{!"llvm.loop.unroll.runtime.disable"}
!15 = distinct !{!15, !12, !14, !13}
!16 = distinct !{!16, !12}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopInstSimplifyPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass