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4 Commits

Author SHA1 Message Date
Benjamin Kramer
e944e2f178 [hexagon] Move BlockRanges and RDF stuff into the llvm namespace. 
No functional change intended.

llvm-svn: 270980
 2016-05-27 10:06:40 +00:00
Krzysztof Parzyszek
49d1f997e6 [RDF] Handle undefined registers in RDF copy propagation 
When updating the graph, make sure that new uses without reaching defs
are handled correctly.

llvm-svn: 267891
 2016-04-28 15:09:19 +00:00
Krzysztof Parzyszek
7ff439af60 [RDF] Improvements to copy propagation 
- Allow any instruction to define equality between registers.
- Keep the DFG updated.

llvm-svn: 258075
 2016-01-18 20:43:57 +00:00
Krzysztof Parzyszek
8ef90fe4f8 RDF: Copy propagation 
This is a very limited implementation of DFG-based copy propagation.
It only handles actual COPY instructions (does not handle other equivalents
such as add-immediate with a 0 operand).
The major limitation is that it does not update the DFG: that will be the
change required to make it more robust (hopefully coming up soon).

llvm-svn: 257490
 2016-01-12 17:23:48 +00:00