[PATCH] ubsan: Port runtime library to (32- and 64-bit) Windows.

[Alexey Samsonov]

LGTM


================
Comment at: lib/ubsan/ubsan_platform.h:20
@@ -20,1 +19,3 @@
+     defined(__aarch64__) || defined(__mips__) || defined(__powerpc64__)) || \
+     defined(_WIN32)
 # define CAN_SANITIZE_UB 1
----------------
Alright... but the boolean expression is really hard to parse. Just move _WIN32 to another branch?
  #if defined(_WIN32)
  # define CAN_SANITIZE_UB 1
  #elif (defined(__linux__) || ....
  # define CAN_SANITIZE_UB 1
  #else
  # define CAN_SANITIZE_UB 0
  #endif

http://reviews.llvm.org/D10856

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