[PATCH] D42176: [WebAssembly] Optimise relocation iteration to remove n^2 loop (LLD)

[Nicholas Wilson via Phabricator via llvm-commits]

ncw created this revision.
ncw added a reviewer: sbc100.
Herald added subscribers: llvm-commits, mgrang, sunfish, aheejin, jgravelle-google, dschuff, jfb.

Addresses issue: https://github.com/WebAssembly/tool-conventions/issues/32

Previously, for each function/segment we iterated over every relocation to find the relevant ones, which is an n^2 operation.

Now, we just make a single pass. There's a very small upfront cost involved in sorting the relocations (which they probably are anyway, but I don't think it's guaranteed).


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D42176

Files:
  wasm/InputChunks.cpp
  wasm/InputChunks.h
  wasm/InputFiles.cpp

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