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

; 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"

@a = external dso_local global [2000 x [2000 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 = %29, %0
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 2000
  br i1 %5, label %6, label %32

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

7:                                                ; preds = %25, %6
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 2000
  br i1 %9, label %10, label %28

10:                                               ; preds = %7
  %11 = load i32, ptr %1, align 4, !tbaa !5
  %12 = load i32, ptr %1, align 4, !tbaa !5
  %13 = mul nsw i32 %11, %12
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = mul nsw i32 %14, %15
  %17 = add nsw i32 %13, %16
  %18 = sitofp i32 %17 to double
  %19 = load i32, ptr %1, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [2000 x [2000 x double]], ptr @a, i64 0, i64 %20
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [2000 x double], ptr %21, i64 0, i64 %23
  store double %18, ptr %24, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %10
  %26 = load i32, ptr %2, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %2, align 4, !tbaa !5
  br label %7, !llvm.loop !11

28:                                               ; preds = %7
  br label %29

29:                                               ; preds = %28
  %30 = load i32, ptr %1, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %1, align 4, !tbaa !5
  br label %3, !llvm.loop !13

32:                                               ; 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"

@a = external dso_local local_unnamed_addr global [2000 x [2000 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 %.preheader

.preheader:                                       ; preds = %0, %13
  %indvars.iv14 = phi i64 [ 0, %0 ], [ %indvars.iv.next15, %13 ]
  %1 = mul nuw nsw i64 %indvars.iv14, %indvars.iv14
  br label %2

2:                                                ; preds = %2, %.preheader
  %indvars.iv = phi i64 [ 0, %.preheader ], [ %indvars.iv.next.1, %2 ]
  %3 = mul nuw nsw i64 %indvars.iv, %indvars.iv
  %4 = add nuw nsw i64 %3, %1
  %5 = trunc nuw i64 %4 to i32
  %6 = uitofp nneg i32 %5 to double
  %7 = getelementptr inbounds [2000 x [2000 x double]], ptr @a, i64 0, i64 %indvars.iv14, i64 %indvars.iv
  store double %6, ptr %7, align 16, !tbaa !5
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %8 = mul nuw nsw i64 %indvars.iv.next, %indvars.iv.next
  %9 = add nuw nsw i64 %8, %1
  %10 = trunc nuw i64 %9 to i32
  %11 = uitofp nneg i32 %10 to double
  %12 = getelementptr inbounds [2000 x [2000 x double]], ptr @a, i64 0, i64 %indvars.iv14, i64 %indvars.iv.next
  store double %11, ptr %12, align 8, !tbaa !5
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %exitcond.not.1 = icmp eq i64 %indvars.iv.next.1, 2000
  br i1 %exitcond.not.1, label %13, label %2, !llvm.loop !9

13:                                               ; preds = %2
  %indvars.iv.next15 = add nuw nsw i64 %indvars.iv14, 1
  %exitcond17.not = icmp eq i64 %indvars.iv.next15, 2000
  br i1 %exitcond17.not, label %14, label %.preheader, !llvm.loop !11

14:                                               ; preds = %13
  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}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass