; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (1446)

; 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 @maxPower(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  %6 = alloca i8, align 1
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 1, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %7, i32 1
  store ptr %8, ptr %2, align 8, !tbaa !5
  %9 = load i8, ptr %7, align 1, !tbaa !11
  store i8 %9, ptr %5, align 1, !tbaa !11
  br label %10

10:                                               ; preds = %34, %1
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !11
  %13 = icmp ne i8 %12, 0
  br i1 %13, label %14, label %35

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #2
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %15, i32 1
  store ptr %16, ptr %2, align 8, !tbaa !5
  %17 = load i8, ptr %15, align 1, !tbaa !11
  store i8 %17, ptr %6, align 1, !tbaa !11
  %18 = load i8, ptr %5, align 1, !tbaa !11
  %19 = sext i8 %18 to i32
  %20 = load i8, ptr %6, align 1, !tbaa !11
  %21 = sext i8 %20 to i32
  %22 = icmp eq i32 %19, %21
  br i1 %22, label %23, label %32

23:                                               ; preds = %14
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %4, align 4, !tbaa !9
  %26 = load i32, ptr %4, align 4, !tbaa !9
  %27 = load i32, ptr %3, align 4, !tbaa !9
  %28 = icmp sgt i32 %26, %27
  br i1 %28, label %29, label %31

29:                                               ; preds = %23
  %30 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %30, ptr %3, align 4, !tbaa !9
  br label %31

31:                                               ; preds = %29, %23
  br label %34

32:                                               ; preds = %14
  store i32 1, ptr %4, align 4, !tbaa !9
  %33 = load i8, ptr %6, align 1, !tbaa !11
  store i8 %33, ptr %5, align 1, !tbaa !11
  br label %34

34:                                               ; preds = %32, %31
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #2
  br label %10, !llvm.loop !12

35:                                               ; preds = %10
  %36 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 1, 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 %36
}

; 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 = !{!"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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i32 @maxPower(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %.019 = getelementptr inbounds i8, ptr %0, i64 1
  %2 = load i8, ptr %.019, align 1, !tbaa !5
  %.not20 = icmp eq i8 %2, 0
  br i1 %.not20, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %3 = load i8, ptr %0, align 1, !tbaa !5
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %4 = phi i8 [ %7, %.lr.ph ], [ %2, %.lr.ph.preheader ]
  %.024 = phi ptr [ %.0, %.lr.ph ], [ %.019, %.lr.ph.preheader ]
  %.01023 = phi i8 [ %4, %.lr.ph ], [ %3, %.lr.ph.preheader ]
  %.01122 = phi i32 [ %.112, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %.01321 = phi i32 [ %.114, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %5 = icmp eq i8 %.01023, %4
  %6 = add nsw i32 %.01122, 1
  %.not18 = icmp slt i32 %.01122, %.01321
  %spec.select = select i1 %.not18, i32 %.01321, i32 %6
  %.114 = select i1 %5, i32 %spec.select, i32 %.01321
  %.112 = select i1 %5, i32 %6, i32 1
  %.0 = getelementptr inbounds i8, ptr %.024, i64 1
  %7 = load i8, ptr %.0, align 1, !tbaa !5
  %.not = icmp eq i8 %7, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.013.lcssa = phi i32 [ 1, %1 ], [ %.114, %.lr.ph ]
  ret i32 %.013.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass