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Author SHA1 Message Date
Hal Finkel
f45717e985 MFTB on PPC64 should really be encoded using MFSPR. 
The MFTB instruction itself is being phased out, and its functionality
is provided by MFSPR. According to the ISA docs, using MFSPR works on all known
chips except for the 601 (which did not have a timebase register anyway)
and the POWER3.

Thanks to Adhemerval Zanella for pointing this out!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161346 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-08-06 21:21:44 +00:00
Hal Finkel
8cc3474f72 Add readcyclecounter lowering on PPC64. 
On PPC64, this can be done with a simple TableGen pattern.
To enable this, I've added the (otherwise missing) readcyclecounter
SDNode definition to TargetSelectionDAG.td.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161302 91177308-0d34-0410-b5e6-96231b3b80d8
 2012-08-04 14:10:46 +00:00