; LLVM IR from bondhugula/pluto :: examples/fdtd-1d (fdtd-1d)

; 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"

@h = external dso_local global [1000000 x double], align 16
@e = external dso_local global [1000001 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 %2, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %19, %0
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = icmp slt i32 %4, 1000000
  br i1 %5, label %6, label %22

6:                                                ; preds = %3
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = sitofp i32 %7 to double
  %9 = fdiv double %8, 1.000000e+06
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [1000000 x double], ptr @h, i64 0, i64 %11
  store double %9, ptr %12, align 8, !tbaa !9
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = sitofp i32 %13 to double
  %15 = fdiv double %14, 1.000000e+06
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1000001 x double], ptr @e, i64 0, i64 %17
  store double %15, ptr %18, align 8, !tbaa !9
  br label %19

19:                                               ; preds = %6
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %2, align 4, !tbaa !5
  br label %3, !llvm.loop !11

22:                                               ; 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"}


; 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"

@h = external dso_local local_unnamed_addr global [1000000 x double], align 16
@e = external dso_local local_unnamed_addr global [1000001 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 {
vector.ph:
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next.1, %vector.body ]
  %vec.ind = phi <2 x i32> [ <i32 0, i32 1>, %vector.ph ], [ %vec.ind.next.1, %vector.body ]
  %0 = uitofp <2 x i32> %vec.ind to <2 x double>
  %1 = fdiv <2 x double> %0, <double 1.000000e+06, double 1.000000e+06>
  %2 = getelementptr inbounds [1000000 x double], ptr @h, i64 0, i64 %index
  store <2 x double> %1, ptr %2, align 16, !tbaa !5
  %3 = getelementptr inbounds [1000001 x double], ptr @e, i64 0, i64 %index
  store <2 x double> %1, ptr %3, align 16, !tbaa !5
  %index.next = or disjoint i64 %index, 2
  %vec.ind.next = add <2 x i32> %vec.ind, <i32 2, i32 2>
  %4 = uitofp <2 x i32> %vec.ind.next to <2 x double>
  %5 = fdiv <2 x double> %4, <double 1.000000e+06, double 1.000000e+06>
  %6 = getelementptr inbounds [1000000 x double], ptr @h, i64 0, i64 %index.next
  store <2 x double> %5, ptr %6, align 16, !tbaa !5
  %7 = getelementptr inbounds [1000001 x double], ptr @e, i64 0, i64 %index.next
  store <2 x double> %5, ptr %7, align 16, !tbaa !5
  %index.next.1 = add nuw nsw i64 %index, 4
  %vec.ind.next.1 = add <2 x i32> %vec.ind, <i32 4, i32 4>
  %8 = icmp eq i64 %index.next.1, 1000000
  br i1 %8, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopLoadEliminationPass,LoopRotatePass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass