; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1641)

; 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 uwtable
define dso_local i32 @countVowelStrings(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 5, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 4, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 3, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %12, %1
  %8 = load i32, ptr %6, align 4, !tbaa !5
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %6, align 4, !tbaa !5
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = icmp sle i32 %9, %10
  br i1 %11, label %12, label %23

12:                                               ; preds = %7
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = add nsw i32 %13, 1
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = add nsw i32 %15, %14
  store i32 %16, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = add nsw i32 %18, %17
  store i32 %19, ptr %4, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = add nsw i32 %21, %20
  store i32 %22, ptr %3, align 4, !tbaa !5
  br label %7, !llvm.loop !9

23:                                               ; preds = %7
  %24 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %24
}

; 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 = distinct !{!9, !10}
!10 = !{!"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(none) uwtable
define dso_local i32 @countVowelStrings(i32 noundef %0) local_unnamed_addr #0 {
  %.not.not13 = icmp sgt i32 %0, 1
  br i1 %.not.not13, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %2 = mul i32 %0, 20
  %3 = add nsw i32 %0, -2
  %4 = zext nneg i32 %3 to i33
  %5 = add nsw i32 %0, -3
  %6 = zext i32 %5 to i33
  %7 = mul i33 %4, %6
  %8 = lshr i33 %7, 1
  %9 = trunc nuw i33 %8 to i32
  %10 = mul i32 %9, 15
  %11 = add i32 %2, %10
  %12 = add nsw i32 %0, -4
  %13 = trunc i33 %7 to i32
  %14 = mul i32 %12, %13
  %15 = and i32 %14, -2
  %16 = add i32 %11, %15
  %17 = zext nneg i32 %3 to i35
  %18 = zext i32 %5 to i35
  %19 = mul i35 %17, %18
  %20 = zext i32 %12 to i35
  %21 = mul i35 %19, %20
  %22 = add nsw i32 %0, -5
  %23 = zext i32 %22 to i35
  %24 = mul i35 %21, %23
  %25 = lshr i35 %24, 3
  %26 = trunc nuw i35 %25 to i32
  %.neg = mul i32 %26, -1431655765
  %27 = add i32 %16, -25
  %28 = add i32 %.neg, %27
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %1
  %.011.lcssa = phi i32 [ 5, %1 ], [ %28, %.lr.ph.preheader ]
  ret i32 %.011.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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)"}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass