[PATCH] D20488: [esan] Add calls from the ctor/dtor to the runtime library

[Qin Zhao via llvm-commits]

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

Adds createEsanInitToolGV for creating a tool-specific variable passed
to the runtime library.

Adds dtor "esan.module_dtor" and inserts calls from the dtor to
"__esan_exit" in the runtime library.

Updates the EfficiencySanitizer test.

http://reviews.llvm.org/D20488

Files:
  lib/Transforms/Instrumentation/EfficiencySanitizer.cpp
  test/Instrumentation/EfficiencySanitizer/cache_frag_basic.ll

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