Make sure that the context argument of HAdd is never NULL.

Make sure that the context argument of HAdd is never NULL.

Although this doesn't hurt currently, it hurts any future compiler
pass relying on the invariant that no operand is NULL.

R=jkummerow@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=12681

[Jakob Kummerow, 2012-10-09 13:49:22]

LGTM with RFC.

https://codereview.chromium.org/11088026/diff/1/src/hydrogen.cc
File src/hydrogen.cc (right):

https://codereview.chromium.org/11088026/diff/1/src/hydrogen.cc#newcode3570
src/hydrogen.cc:3570: HValue* context =
HBinaryOperation::cast(check->index())->context();
I'd appreciate a comment here why check->index() is always an HBinaryOperation;
it is not obvious.

[Sven Panne, 2012-10-09 13:53:11]

Comment added, landing...