Zack Weinberg - zack's todo list (original) (raw)

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• To: gcc at gcc dot gnu dot org
• Subject: zack's todo list
• From: "Zack Weinberg"
• Date: Mon, 13 Nov 2000 09:56:06 -0800

This is a list of things I'd like to get done before 3.0. Most of them are performance related.

• GC performance

  • Get strings out of the GC arena. (patch submitted)
  • Get Laurnyas and Alexandre's patch to make ggc-page usable without mmap applied, so we can throw away ggc-simple.
  • Split arena into separate tree, RTL, misc pools.
  • Dual mark bits for trees; avoids millions of calls to ggc_set_mark. (Requires separate pools.)
  • Look into not rounding all allocations up to powers of two. (Saves large amount of memory.)
  • Better GC statistics.

• Junk allocations

  • Make FUNCTION et al allocate the string only when used. (Avoids pointless allocation of strings and decl structures for every function. May mean we don't need prune_unused_decls anymore.)
  • Lazy make_decl_rtl - avoid allocating symbol_ref RTLs when they won't ever be used.
  • Don't create a complete IDENTIFIER_NODE for DECL_ASSEMBLER_NAME.

• Makefile cleanups

  • Run mklibgcc at configure time and merge output into the big Makefile
  • Compile libiberty for build, get rid of private copies of several libiberty files (Kaveh has patch already?)
  • Do installation in separate shell script?

• Misc

  • Templatized hashtab.c (avoids abstraction overhead, minor speed win)
  • Update cpp.texi

zw

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