Use fewer allocators.
Instead of having 3 section allocators per file, have 3 for all files.
This is a substantial performance improvement for some cases. Linking
chromium without gc speeds up by 1.065x.
This requires using _exit in fatal since we have to avoid destructing
an InputSection if fatal is called from the constructor.
Thanks to Rui for the suggestion.
llvm-svn: 285290
diff --git a/lld/ELF/InputFiles.cpp b/lld/ELF/InputFiles.cpp
index 507090d..b0c177f 100644
--- a/lld/ELF/InputFiles.cpp
+++ b/lld/ELF/InputFiles.cpp
@@ -386,7 +386,8 @@
// If -r is given, we do not interpret or apply relocation
// but just copy relocation sections to output.
if (Config->Relocatable)
- return new (IAlloc.Allocate()) InputSection<ELFT>(this, &Sec, Name);
+ return new (GAlloc<ELFT>::IAlloc.Allocate())
+ InputSection<ELFT>(this, &Sec, Name);
// Find the relocation target section and associate this
// section with it.
@@ -428,11 +429,14 @@
// .eh_frame_hdr section for runtime. So we handle them with a special
// class. For relocatable outputs, they are just passed through.
if (Name == ".eh_frame" && !Config->Relocatable)
- return new (EHAlloc.Allocate()) EhInputSection<ELFT>(this, &Sec, Name);
+ return new (GAlloc<ELFT>::EHAlloc.Allocate())
+ EhInputSection<ELFT>(this, &Sec, Name);
if (shouldMerge(Sec))
- return new (MAlloc.Allocate()) MergeInputSection<ELFT>(this, &Sec, Name);
- return new (IAlloc.Allocate()) InputSection<ELFT>(this, &Sec, Name);
+ return new (GAlloc<ELFT>::MAlloc.Allocate())
+ MergeInputSection<ELFT>(this, &Sec, Name);
+ return new (GAlloc<ELFT>::IAlloc.Allocate())
+ InputSection<ELFT>(this, &Sec, Name);
}
template <class ELFT> void elf::ObjectFile<ELFT>::initializeSymbols() {