majnemer added inline comments. ================ Comment at: lib/Driver/MSVCToolChain.cpp:481 @@ +480,3 @@ + + std::vector<uint8_t> VersionBlock(VersionSize); + if (!::GetFileVersionInfoW(ClExeWide.c_str(), 0, VersionSize, ---------------- amccarth wrote: > majnemer wrote: > > It might be nicer to use a `SmallVector<uint8_t, > > sizeof(VS_FIXEDFILEINFO)>`, or whatever `VersionSize` typically is, here to > > avoid heap allocation in the common case. > What's the cutoff for "small"? The version block in cl.exe is about 9KB. Using 10K is probably fine, the default stack size on Windows is a massive 1 MB and this function is not reentrant.
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