[llvm] r264383 - StringMap: reserve appropriate size when initializing from an initializer list

[David Blaikie via llvm-commits]

Worth a test?
On Mar 24, 2016 11:02 PM, "Mehdi Amini via llvm-commits" <
llvm-commits at lists.llvm.org> wrote:

> Author: mehdi_amini
> Date: Fri Mar 25 00:57:47 2016
> New Revision: 264383
>
> URL: http://llvm.org/viewvc/llvm-project?rev=264383&view=rev
> Log:
> StringMap: reserve appropriate size when initializing from an initializer
> list
>
> From: Mehdi Amini <mehdi.amini at apple.com>
>
> Modified:
>     llvm/trunk/include/llvm/ADT/StringMap.h
>
> Modified: llvm/trunk/include/llvm/ADT/StringMap.h
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/ADT/StringMap.h?rev=264383&r1=264382&r2=264383&view=diff
>
> ==============================================================================
> --- llvm/trunk/include/llvm/ADT/StringMap.h (original)
> +++ llvm/trunk/include/llvm/ADT/StringMap.h Fri Mar 25 00:57:47 2016
> @@ -233,7 +233,7 @@ public:
>        Allocator(A) {}
>
>    StringMap(std::initializer_list<std::pair<StringRef, ValueTy>> List)
> -      : StringMapImpl(static_cast<unsigned>(sizeof(MapEntryTy))) {
> +      : StringMapImpl(List.size(),
> static_cast<unsigned>(sizeof(MapEntryTy))) {
>      for (const auto &P : List) {
>        insert(P);
>      }
>
>
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