Hal Finkel c8cf2b88bc Handle early-clobber registers in the aggressive anti-dep breaker ...

The aggressive anti-dep breaker, used by the PowerPC backend during post-RA
scheduling (but is available to all targets), did not handle early-clobber MI
operands (at all). When constructing the list of available registers for the
replacement of some def operand, check the using instructions, and remove
registers assigned to early-clobbered defs from the set.

Fixes PR21452.

llvm-svn: 223727

2014-12-09 01:00:59 +00:00

35 KiB

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