; LLVM IR from bondhugula/pluto :: examples/dct (dct)

; 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"

@cos1 = external dso_local global [1024 x [1037 x double]], align 16
@block = external dso_local global [1024 x [1067 x double]], align 16

; Function Attrs: nounwind uwtable
define dso_local void @init_array() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #2
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %41, %0
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 1024
  br i1 %5, label %6, label %44

6:                                                ; preds = %3
  store i32 0, ptr %2, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %37, %6
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 1024
  br i1 %9, label %10, label %40

10:                                               ; preds = %7
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = mul nsw i32 %11, %12
  %14 = srem i32 %13, 1024
  %15 = add nsw i32 1, %14
  %16 = sitofp i32 %15 to double
  %17 = fdiv double %16, 2.000000e+00
  %18 = load i32, ptr %1, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [1024 x [1037 x double]], ptr @cos1, i64 0, i64 %19
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [1037 x double], ptr %20, i64 0, i64 %22
  store double %17, ptr %23, align 8, !tbaa !9
  %24 = load i32, ptr %1, align 4, !tbaa !5
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = mul nsw i32 %24, %25
  %27 = srem i32 %26, 1024
  %28 = add nsw i32 1, %27
  %29 = sitofp i32 %28 to double
  %30 = fdiv double %29, 2.000000e+00
  %31 = load i32, ptr %1, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [1024 x [1067 x double]], ptr @block, i64 0, i64 %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [1067 x double], ptr %33, i64 0, i64 %35
  store double %30, ptr %36, align 8, !tbaa !9
  br label %37

37:                                               ; preds = %10
  %38 = load i32, ptr %2, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %2, align 4, !tbaa !5
  br label %7, !llvm.loop !11

40:                                               ; preds = %7
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %1, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %1, align 4, !tbaa !5
  br label %3, !llvm.loop !13

44:                                               ; preds = %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #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 = !{!"int", !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}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@cos1 = external dso_local local_unnamed_addr global [1024 x [1037 x double]], align 16
@block = external dso_local local_unnamed_addr global [1024 x [1067 x double]], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(write, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @init_array() local_unnamed_addr #0 {
  br label %vector.ph

vector.ph:                                        ; preds = %middle.block, %0
  %indvars.iv16 = phi i64 [ 0, %0 ], [ %indvars.iv.next17, %middle.block ]
  %broadcast.splatinsert = insertelement <2 x i64> poison, i64 %indvars.iv16, i64 0
  %broadcast.splat = shufflevector <2 x i64> %broadcast.splatinsert, <2 x i64> poison, <2 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.ind = phi <2 x i64> [ <i64 0, i64 1>, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %1 = mul nuw nsw <2 x i64> %vec.ind, %broadcast.splat
  %2 = trunc <2 x i64> %1 to <2 x i32>
  %3 = and <2 x i32> %2, <i32 1023, i32 1023>
  %4 = add nuw nsw <2 x i32> %3, <i32 1, i32 1>
  %5 = uitofp nneg <2 x i32> %4 to <2 x double>
  %6 = fmul <2 x double> %5, <double 5.000000e-01, double 5.000000e-01>
  %7 = getelementptr inbounds [1024 x [1037 x double]], ptr @cos1, i64 0, i64 %indvars.iv16, i64 %index
  store <2 x double> %6, ptr %7, align 8, !tbaa !5
  %8 = getelementptr inbounds [1024 x [1067 x double]], ptr @block, i64 0, i64 %indvars.iv16, i64 %index
  store <2 x double> %6, ptr %8, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 2
  %vec.ind.next = add <2 x i64> %vec.ind, <i64 2, i64 2>
  %9 = icmp eq i64 %index.next, 1024
  br i1 %9, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %indvars.iv.next17 = add nuw nsw i64 %indvars.iv16, 1
  %exitcond19.not = icmp eq i64 %indvars.iv.next17, 1024
  br i1 %exitcond19.not, label %10, label %vector.ph, !llvm.loop !13

10:                                               ; preds = %middle.block
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(write, 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" }

!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, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass