; LLVM IR from codee-com/open-catalog :: Checks/PWR017 (example)

; 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 willreturn memory(read) uwtable
define dso_local i32 @example(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %8, %1
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp slt i32 %6, 1000
  br i1 %7, label %8, label %17

8:                                                ; preds = %5
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = add nsw i32 %10, 1
  store i32 %11, ptr %4, align 4, !tbaa !9
  %12 = sext i32 %10 to i64
  %13 = getelementptr inbounds i32, ptr %9, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !9
  %15 = load i32, ptr %3, align 4, !tbaa !9
  %16 = add nsw i32 %15, %14
  store i32 %16, ptr %3, align 4, !tbaa !9
  br label %5, !llvm.loop !11

17:                                               ; preds = %5
  %18 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %18
}

; 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 willreturn memory(read) 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local i32 @example(ptr nocapture noundef readonly %0) 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.4, %vector.body ]
  %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %23, %vector.body ]
  %vec.phi8 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %24, %vector.body ]
  %1 = getelementptr inbounds i32, ptr %0, i64 %index
  %2 = getelementptr inbounds i8, ptr %1, i64 16
  %wide.load = load <4 x i32>, ptr %1, align 4, !tbaa !5
  %wide.load9 = load <4 x i32>, ptr %2, align 4, !tbaa !5
  %3 = add <4 x i32> %wide.load, %vec.phi
  %4 = add <4 x i32> %wide.load9, %vec.phi8
  %5 = getelementptr inbounds i32, ptr %0, i64 %index
  %6 = getelementptr inbounds i8, ptr %5, i64 32
  %7 = getelementptr inbounds i8, ptr %5, i64 48
  %wide.load.1 = load <4 x i32>, ptr %6, align 4, !tbaa !5
  %wide.load9.1 = load <4 x i32>, ptr %7, align 4, !tbaa !5
  %8 = add <4 x i32> %wide.load.1, %3
  %9 = add <4 x i32> %wide.load9.1, %4
  %10 = getelementptr inbounds i32, ptr %0, i64 %index
  %11 = getelementptr inbounds i8, ptr %10, i64 64
  %12 = getelementptr inbounds i8, ptr %10, i64 80
  %wide.load.2 = load <4 x i32>, ptr %11, align 4, !tbaa !5
  %wide.load9.2 = load <4 x i32>, ptr %12, align 4, !tbaa !5
  %13 = add <4 x i32> %wide.load.2, %8
  %14 = add <4 x i32> %wide.load9.2, %9
  %15 = getelementptr inbounds i32, ptr %0, i64 %index
  %16 = getelementptr inbounds i8, ptr %15, i64 96
  %17 = getelementptr inbounds i8, ptr %15, i64 112
  %wide.load.3 = load <4 x i32>, ptr %16, align 4, !tbaa !5
  %wide.load9.3 = load <4 x i32>, ptr %17, align 4, !tbaa !5
  %18 = add <4 x i32> %wide.load.3, %13
  %19 = add <4 x i32> %wide.load9.3, %14
  %20 = getelementptr inbounds i32, ptr %0, i64 %index
  %21 = getelementptr inbounds i8, ptr %20, i64 128
  %22 = getelementptr inbounds i8, ptr %20, i64 144
  %wide.load.4 = load <4 x i32>, ptr %21, align 4, !tbaa !5
  %wide.load9.4 = load <4 x i32>, ptr %22, align 4, !tbaa !5
  %23 = add <4 x i32> %wide.load.4, %18
  %24 = add <4 x i32> %wide.load9.4, %19
  %index.next.4 = add nuw nsw i64 %index, 40
  %25 = icmp eq i64 %index.next.4, 1000
  br i1 %25, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %24, %23
  %26 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  ret i32 %26
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 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 = !{!"int", !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: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass