; LLVM IR from moarseniy/CudaFEMproject :: deprecated/Linal2/src/Linal2.ll (ZN7MyArray6ResizeEi)

; 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"

%class.MyArray = type { i32, ptr }

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #0

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7MyArray6ResizeEi(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) #3 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  %7 = getelementptr inbounds %class.MyArray, ptr %6, i32 0, i32 0
  %8 = load i32, ptr %7, align 8, !tbaa !11
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %38

10:                                               ; preds = %2
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = getelementptr inbounds %class.MyArray, ptr %6, i32 0, i32 0
  store i32 %11, ptr %12, align 8, !tbaa !11
  %13 = getelementptr inbounds %class.MyArray, ptr %6, i32 0, i32 0
  %14 = load i32, ptr %13, align 8, !tbaa !11
  %15 = sext i32 %14 to i64
  %16 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %15, i64 4)
  %17 = extractvalue { i64, i1 } %16, 1
  %18 = extractvalue { i64, i1 } %16, 0
  %19 = select i1 %17, i64 -1, i64 %18
  %20 = call noalias noundef nonnull ptr @_Znam(i64 noundef %19) #4
  %21 = getelementptr inbounds %class.MyArray, ptr %6, i32 0, i32 1
  store ptr %20, ptr %21, align 8, !tbaa !13
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %22

22:                                               ; preds = %34, %10
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = getelementptr inbounds %class.MyArray, ptr %6, i32 0, i32 0
  %25 = load i32, ptr %24, align 8, !tbaa !11
  %26 = icmp slt i32 %23, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  br label %37

28:                                               ; preds = %22
  %29 = getelementptr inbounds %class.MyArray, ptr %6, i32 0, i32 1
  %30 = load ptr, ptr %29, align 8, !tbaa !13
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds float, ptr %30, i64 %32
  store float 0.000000e+00, ptr %33, align 4, !tbaa !14
  br label %34

34:                                               ; preds = %28
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %5, align 4, !tbaa !9
  br label %22, !llvm.loop !16

37:                                               ; preds = %27
  br label %38

38:                                               ; preds = %37, %2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #1 = { nobuiltin allocsize(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 nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { mustprogress 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 #4 = { builtin allocsize(0) }
attributes #5 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_ZTS7MyArray", !10, i64 0, !6, i64 8}
!13 = !{!12, !6, i64 8}
!14 = !{!15, !15, i64 0}
!15 = !{!"float", !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7MyArray6ResizeEi(ptr nocapture noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) local_unnamed_addr #1 align 2 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %5, label %.loopexit

5:                                                ; preds = %2
  store i32 %1, ptr %0, align 8, !tbaa !5
  %6 = zext i32 %1 to i64
  %7 = icmp slt i32 %1, 0
  %8 = shl nuw nsw i64 %6, 2
  %9 = select i1 %7, i64 -1, i64 %8
  %10 = tail call noalias noundef nonnull ptr @_Znam(i64 noundef %9) #3
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %10, ptr %11, align 8, !tbaa !11
  %12 = icmp sgt i32 %1, 0
  br i1 %12, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %5
  tail call void @llvm.memset.p0.i64(ptr nonnull align 4 %10, i8 0, i64 %8, i1 false), !tbaa !12
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph.preheader, %5, %2
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

attributes #0 = { nobuiltin allocsize(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 = { mustprogress 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: write) }
attributes #3 = { builtin allocsize(0) }

!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, !7, i64 0}
!6 = !{!"_ZTS7MyArray", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!13, !13, i64 0}
!13 = !{!"float", !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass