[PATCH] [ASan] Use less shadow on Win 32-bit

[Kostya Serebryany]

================
Comment at: lib/asan/asan_rtl.cc:333
@@ +332,3 @@
+  // Make sure everything is properly aligned:
+  kHighMemEnd = kHighMemEnd | (GetPageSizeCached() - 1);
+  // Including the high-shadow beginning address...
----------------
kHighMemEnd |= (GetPageSizeCached() * SHADOW_SCALE - 1);

and remove the loop. 


http://llvm-reviews.chandlerc.com/D1139