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3 Commits

Author SHA1 Message Date
Dan Gohman
a5f382da8b Reapply r143206, with fixes. Disallow physical register lifetimes 
across calls, and only check for nested dependences on the special
call-sequence-resource register.

llvm-svn: 143660
 2011-11-03 21:49:52 +00:00
Dan Gohman
826cec9a4b Revert r143206, as there are still some failing tests. 
llvm-svn: 143262
 2011-10-29 00:41:52 +00:00
Dan Gohman
dedcc22bcd Reapply r143177 and r143179 (reverting r143188), with scheduler 
fixes: Use a separate register, instead of SP, as the
calling-convention resource, to avoid spurious conflicts with
actual uses of SP. Also, fix unscheduling of calling sequences,
which can be triggered by pseudo-two-address dependencies.

llvm-svn: 143206
 2011-10-28 17:55:38 +00:00