clang-p2996

Files

George Rimar 958b01aa69 [DWARF] - Speedup handling of relocations in DWARFContextInMemory.

I am working on a speedup of building .gdb_index in LLD and 
noticed that relocations that are proccessed in DWARFContextInMemory often uses
the same symbol in a row. This patch introduces caching to reduce the relocations
proccessing time.

For benchmark,
I took debug LLC binary objects configured with -ggnu-pubnames and linked it using LLD.

Link time without --gdb-index is about 4,45s.
Link time with --gdb-index: a) Without patch: 19,16s b) With patch: 15,52s
That means time spent on --gdb-index in this configuration is 
19,16s - 4,45s = 14,71s (without patch) vs 15,52s - 4,45s = 11,07s (with patch).

Differential revision: https://reviews.llvm.org/D31136

llvm-svn: 303051

2017-05-15 11:45:28 +00:00

CodeView

[CodeView] Add a random access type visitor.

2017-05-12 19:18:12 +00:00

DWARF

[DWARF] - Speedup handling of relocations in DWARFContextInMemory.

2017-05-15 11:45:28 +00:00

MSF

[Support] Move Stream library from MSF -> Support.

2017-03-02 20:52:51 +00:00

PDB

[CodeView] Add a random access type visitor.