; LLVM IR from VastoLorde95/Competitive-Programming :: Codejam/APAC 2017/Round A/Problem C/C.ll (Z1fe)

; 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"

@m = external dso_local global i32, align 4
@c = external dso_local global [110 x double], align 16

; 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
define dso_local noundef x86_fp80 @_Z1fe(x86_fp80 noundef %0) #1 {
  %2 = alloca x86_fp80, align 16
  %3 = alloca x86_fp80, align 16
  %4 = alloca x86_fp80, align 16
  %5 = alloca i32, align 4
  store x86_fp80 %0, ptr %2, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %3) #3
  store x86_fp80 0xK3FFF8000000000000000, ptr %3, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 16, ptr %4) #3
  %6 = load double, ptr @c, align 16, !tbaa !9
  %7 = fpext double %6 to x86_fp80
  store x86_fp80 %7, ptr %4, align 16, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 1, ptr %5, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %25, %1
  %9 = load i32, ptr %5, align 4, !tbaa !11
  %10 = load i32, ptr @m, align 4, !tbaa !11
  %11 = icmp sle i32 %9, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %28

13:                                               ; preds = %8
  %14 = load x86_fp80, ptr %2, align 16, !tbaa !5
  %15 = load x86_fp80, ptr %3, align 16, !tbaa !5
  %16 = fmul x86_fp80 %15, %14
  store x86_fp80 %16, ptr %3, align 16, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !11
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [110 x double], ptr @c, i64 0, i64 %18
  %20 = load double, ptr %19, align 8, !tbaa !9
  %21 = fpext double %20 to x86_fp80
  %22 = load x86_fp80, ptr %3, align 16, !tbaa !5
  %23 = load x86_fp80, ptr %4, align 16, !tbaa !5
  %24 = call x86_fp80 @llvm.fmuladd.f80(x86_fp80 %21, x86_fp80 %22, x86_fp80 %23)
  store x86_fp80 %24, ptr %4, align 16, !tbaa !5
  br label %25

25:                                               ; preds = %13
  %26 = load i32, ptr %5, align 4, !tbaa !11
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %5, align 4, !tbaa !11
  br label %8, !llvm.loop !13

28:                                               ; preds = %12
  %29 = load x86_fp80, ptr %4, align 16, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 16, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 16, ptr %3) #3
  ret x86_fp80 %29
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare x86_fp80 @llvm.fmuladd.f80(x86_fp80, x86_fp80, x86_fp80) #2

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"long double", !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 = !{!"int", !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"

@m = external dso_local local_unnamed_addr global i32, align 4
@c = external dso_local local_unnamed_addr global [110 x double], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef x86_fp80 @_Z1fe(x86_fp80 noundef %0) local_unnamed_addr #0 {
  %2 = load double, ptr @c, align 16, !tbaa !5
  %3 = fpext double %2 to x86_fp80
  %4 = load i32, ptr @m, align 4, !tbaa !9
  %.not10 = icmp slt i32 %4, 1
  br i1 %.not10, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %5 = zext nneg i32 %4 to i64
  %xtraiter = and i64 %5, 3
  %6 = icmp ult i32 %4, 4
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %5, 2147483644
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.lcssa.ph = phi x86_fp80 [ poison, %.lr.ph.preheader ], [ %31, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next.3, %.lr.ph ]
  %.0812.unr = phi x86_fp80 [ %3, %.lr.ph.preheader ], [ %31, %.lr.ph ]
  %.0911.unr = phi x86_fp80 [ 0xK3FFF8000000000000000, %.lr.ph.preheader ], [ %27, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.lr.ph.epil ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.0812.epil = phi x86_fp80 [ %11, %.lr.ph.epil ], [ %.0812.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.0911.epil = phi x86_fp80 [ %7, %.lr.ph.epil ], [ %.0911.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.lr.ph.epil ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %7 = fmul x86_fp80 %.0911.epil, %0
  %8 = getelementptr inbounds [110 x double], ptr @c, i64 0, i64 %indvars.iv.epil
  %9 = load double, ptr %8, align 8, !tbaa !5
  %10 = fpext double %9 to x86_fp80
  %11 = tail call x86_fp80 @llvm.fmuladd.f80(x86_fp80 %10, x86_fp80 %7, x86_fp80 %.0812.epil)
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.lr.ph.epil, !llvm.loop !11

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.lr.ph.epil, %1
  %.08.lcssa = phi x86_fp80 [ %3, %1 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %11, %.lr.ph.epil ]
  ret x86_fp80 %.08.lcssa

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader.new ], [ %indvars.iv.next.3, %.lr.ph ]
  %.0812 = phi x86_fp80 [ %3, %.lr.ph.preheader.new ], [ %31, %.lr.ph ]
  %.0911 = phi x86_fp80 [ 0xK3FFF8000000000000000, %.lr.ph.preheader.new ], [ %27, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.3, %.lr.ph ]
  %12 = fmul x86_fp80 %.0911, %0
  %13 = getelementptr inbounds [110 x double], ptr @c, i64 0, i64 %indvars.iv
  %14 = load double, ptr %13, align 8, !tbaa !5
  %15 = fpext double %14 to x86_fp80
  %16 = tail call x86_fp80 @llvm.fmuladd.f80(x86_fp80 %15, x86_fp80 %12, x86_fp80 %.0812)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %17 = fmul x86_fp80 %12, %0
  %18 = getelementptr inbounds [110 x double], ptr @c, i64 0, i64 %indvars.iv.next
  %19 = load double, ptr %18, align 8, !tbaa !5
  %20 = fpext double %19 to x86_fp80
  %21 = tail call x86_fp80 @llvm.fmuladd.f80(x86_fp80 %20, x86_fp80 %17, x86_fp80 %16)
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %22 = fmul x86_fp80 %17, %0
  %23 = getelementptr inbounds [110 x double], ptr @c, i64 0, i64 %indvars.iv.next.1
  %24 = load double, ptr %23, align 8, !tbaa !5
  %25 = fpext double %24 to x86_fp80
  %26 = tail call x86_fp80 @llvm.fmuladd.f80(x86_fp80 %25, x86_fp80 %22, x86_fp80 %21)
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %27 = fmul x86_fp80 %22, %0
  %28 = getelementptr inbounds [110 x double], ptr @c, i64 0, i64 %indvars.iv.next.2
  %29 = load double, ptr %28, align 8, !tbaa !5
  %30 = fpext double %29 to x86_fp80
  %31 = tail call x86_fp80 @llvm.fmuladd.f80(x86_fp80 %30, x86_fp80 %27, x86_fp80 %26)
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %niter.next.3 = add i64 %niter, 4
  %niter.ncmp.3 = icmp eq i64 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !13
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare x86_fp80 @llvm.fmuladd.f80(x86_fp80, x86_fp80, x86_fp80) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, 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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.unroll.disable"}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


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