[PATCH] D20483: [esan] EfficiencySanitizer working set tool fastpath

[Derek Bruening via llvm-commits]

bruening created this revision.
bruening added a reviewer: aizatsky.
bruening added subscribers: llvm-commits, eugenis, kcc, zhaoqin, vitalybuka.

Adds fastpath instrumentation for esan's working set tool.  The
instrumentation for aligned loads and stores consists of inlined writes
to shadow memory bits for each accessed cache line.

Adds a basic test for this instrumentation.

http://reviews.llvm.org/D20483

Files:
  include/llvm/Transforms/Instrumentation.h
  lib/Transforms/Instrumentation/EfficiencySanitizer.cpp
  test/Instrumentation/EfficiencySanitizer/working_set_basic.ll

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