[PATCH] Skip some unnecessary type checks.

Samuel Benzaquen sbenza at google.com
Mon Dec 1 13:51:49 PST 2014

Hi klimek,

Skip some unnecessary type checks wrt DynTypedNodes.
Add DynTypedNode::getUnchecked() to skip the runtime check when the type
is known.
Speed up DynTypedNode::operator== by using isSame() instead of
Skip the type check in MatcherInterface<T>::matches(). All calls come
from DynTypedMatcher::matches(), which already did the type check.
This change speeds up our clang-tidy benchmark by ~4%.


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