[all-commits] [llvm/llvm-project] 088918: Tweak SimpleFastHash

[Aaron via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0889181625bb570e463362ab8f53f9a14c886b2e
      https://github.com/llvm/llvm-project/commit/0889181625bb570e463362ab8f53f9a14c886b2e
  Author: Aaron Green <aarongreen at google.com>
  Date:   2021-04-01 (Thu, 01 Apr 2021)

  Changed paths:
    M compiler-rt/lib/fuzzer/FuzzerTracePC.h
    M compiler-rt/lib/fuzzer/FuzzerUtil.cpp
    M compiler-rt/lib/fuzzer/FuzzerUtil.h

  Log Message:
  -----------
  Tweak SimpleFastHash

This change adds a SimpleFastHash64 variant of SimpleFastHash which allows call sites to specify a starting value and get a 64 bit hash in return. This allows a hash to be "resumed" with more data.

A later patch needs this to be able to hash a sequence of module-relative values one at a time, rather than just a region a memory.

Reviewed By: morehouse

Differential Revision: https://reviews.llvm.org/D94510