Remove unnecessary recording of temp operands in the register allocator....

Remove unnecessary recording of temp operands in the register allocator.

When processing register contraints we used to add writable input operands
also as temp operands to the same instruction.

This does not seem necessary since we create a fresh virtual register
for writable inputs and insert a definition in the gap before the instruction.


Committed: http://code.google.com/p/v8/source/detail?r=6342

[Vyacheslav Egorov (Chromium), 2011-01-17 09:54:50]

LGTM

http://codereview.chromium.org/6350002/diff/1/src/lithium-allocator.cc
File src/lithium-allocator.cc (left):

http://codereview.chromium.org/6350002/diff/1/src/lithium-allocator.cc#oldcod...
src/lithium-allocator.cc:840: second->AddTemp(cur_input);
Add assert that cur_input is used at end, not at start to guarantee equivalent
liveranges.