; LLVM IR from YuchenHHH/Sparse-linear-systems :: Source (cs_malloc)

; 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 ptr @cs_realloc(ptr noundef %0, i64 noundef %1, i64 noundef %2, ptr noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  %11 = load i64, ptr %6, align 8, !tbaa !9
  %12 = icmp sgt i64 %11, 1
  br i1 %12, label %13, label %15

13:                                               ; preds = %4
  %14 = load i64, ptr %6, align 8, !tbaa !9
  br label %16

15:                                               ; preds = %4
  br label %16

16:                                               ; preds = %15, %13
  %17 = phi i64 [ %14, %13 ], [ 1, %15 ]
  %18 = load i64, ptr %7, align 8, !tbaa !9
  %19 = mul i64 %17, %18
  %20 = call ptr @realloc(ptr noundef %10, i64 noundef %19) #4
  store ptr %20, ptr %9, align 8, !tbaa !5
  %21 = load ptr, ptr %9, align 8, !tbaa !5
  %22 = icmp ne ptr %21, null
  %23 = zext i1 %22 to i32
  %24 = sext i32 %23 to i64
  %25 = load ptr, ptr %8, align 8, !tbaa !5
  store i64 %24, ptr %25, align 8, !tbaa !9
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  %27 = load i64, ptr %26, align 8, !tbaa !9
  %28 = icmp ne i64 %27, 0
  br i1 %28, label %29, label %31

29:                                               ; preds = %16
  %30 = load ptr, ptr %9, align 8, !tbaa !5
  br label %33

31:                                               ; preds = %16
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  br label %33

33:                                               ; preds = %31, %29
  %34 = phi ptr [ %30, %29 ], [ %32, %31 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret ptr %34
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind allocsize(1)
declare ptr @realloc(ptr noundef, i64 noundef) #2

; 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 allocsize(1) "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 #3 = { nounwind }
attributes #4 = { nounwind allocsize(1) }

!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 = !{!"long", !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"

; Function Attrs: mustprogress nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite) uwtable
define dso_local noundef ptr @cs_realloc(ptr noundef %0, i64 noundef %1, i64 noundef %2, ptr nocapture noundef writeonly %3) local_unnamed_addr #0 {
  %5 = tail call i64 @llvm.smax.i64(i64 %1, i64 1)
  %6 = mul i64 %5, %2
  %7 = tail call ptr @realloc(ptr noundef %0, i64 noundef %6) #3
  %8 = icmp ne ptr %7, null
  %9 = zext i1 %8 to i64
  store i64 %9, ptr %3, align 8, !tbaa !5
  %10 = select i1 %8, ptr %7, ptr %0
  ret ptr %10
}

; Function Attrs: mustprogress nounwind willreturn allockind("realloc") allocsize(1) memory(argmem: readwrite, inaccessiblemem: readwrite)
declare noalias noundef ptr @realloc(ptr allocptr nocapture noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smax.i64(i64, i64) #2

attributes #0 = { mustprogress nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite) 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 = { mustprogress nounwind willreturn allockind("realloc") allocsize(1) memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 speculatable willreturn memory(none) }
attributes #3 = { nounwind allocsize(1) }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass