; LLVM IR from int32bit/leetcode :: algorithms/ReverseWordsinaString (solve)

; 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"

@__const.main.s1 = external hidden unnamed_addr constant [16 x i8], align 16
@__const.main.s2 = external hidden unnamed_addr constant [33 x i8], align 16
@__const.main.s3 = external hidden unnamed_addr constant [2 x i8], align 1
@__const.main.s4 = external hidden unnamed_addr constant [329 x i8], align 16
@.str = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local void @reverseWords(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca [16 x i8], align 16
  %7 = alloca [33 x i8], align 16
  %8 = alloca [2 x i8], align 1
  %9 = alloca [329 x i8], align 16
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr %6) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %6, ptr align 16 @__const.main.s1, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 33, ptr %7) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %7, ptr align 16 @__const.main.s2, i64 33, i1 false)
  call void @llvm.lifetime.start.p0(i64 2, ptr %8) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %8, ptr align 1 @__const.main.s3, i64 2, i1 false)
  call void @llvm.lifetime.start.p0(i64 329, ptr %9) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %9, ptr align 16 @__const.main.s4, i64 329, i1 false)
  %10 = getelementptr inbounds [16 x i8], ptr %6, i64 0, i64 0
  call void @reverseWords(ptr noundef %10)
  %11 = getelementptr inbounds [33 x i8], ptr %7, i64 0, i64 0
  call void @reverseWords(ptr noundef %11)
  %12 = getelementptr inbounds [2 x i8], ptr %8, i64 0, i64 0
  call void @reverseWords(ptr noundef %12)
  %13 = getelementptr inbounds [329 x i8], ptr %9, i64 0, i64 0
  call void @reverseWords(ptr noundef %13)
  %14 = getelementptr inbounds [16 x i8], ptr %6, i64 0, i64 0
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %14)
  %16 = getelementptr inbounds [33 x i8], ptr %7, i64 0, i64 0
  %17 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %16)
  %18 = getelementptr inbounds [2 x i8], ptr %8, i64 0, i64 0
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %18)
  %20 = getelementptr inbounds [329 x i8], ptr %9, i64 0, i64 0
  %21 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %20)
  call void @llvm.lifetime.end.p0(i64 329, ptr %9) #4
  call void @llvm.lifetime.end.p0(i64 2, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 33, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %6) #4
  ret i32 0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

declare i32 @printf(ptr noundef, ...) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 #4 = { 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 = !{!"any pointer", !7, i64 0}


; 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"

@__const.main.s1 = external hidden unnamed_addr constant [16 x i8], align 16
@__const.main.s2 = external hidden unnamed_addr constant [33 x i8], align 16
@__const.main.s3 = external hidden unnamed_addr constant [2 x i8], align 1
@__const.main.s4 = external hidden unnamed_addr constant [329 x i8], align 16
@.str = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare dso_local void @reverseWords(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #1 {
  %3 = alloca [16 x i8], align 16
  %4 = alloca [33 x i8], align 16
  %5 = alloca [2 x i8], align 2
  %6 = alloca [329 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %3, ptr noundef nonnull align 16 dereferenceable(16) @__const.main.s1, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 33, ptr nonnull %4) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(33) %4, ptr noundef nonnull align 16 dereferenceable(33) @__const.main.s2, i64 33, i1 false)
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %5) #4
  %7 = load i16, ptr @__const.main.s3, align 1
  store i16 %7, ptr %5, align 2
  call void @llvm.lifetime.start.p0(i64 329, ptr nonnull %6) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(329) %6, ptr noundef nonnull align 16 dereferenceable(329) @__const.main.s4, i64 329, i1 false)
  call void @reverseWords(ptr noundef nonnull %3)
  call void @reverseWords(ptr noundef nonnull %4)
  call void @reverseWords(ptr noundef nonnull %5)
  call void @reverseWords(ptr noundef nonnull %6)
  %8 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %3)
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %4)
  %10 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %5)
  %11 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %6)
  call void @llvm.lifetime.end.p0(i64 329, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %5) #4
  call void @llvm.lifetime.end.p0(i64 33, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #4
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nofree nounwind "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 #4 = { 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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass