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Author SHA1 Message Date
Kyle Butt 71b1ca1be4 Codegen: Tail Merge: Be less aggressive with special cases. 
This change makes it possible for tail-duplication and tail-merging to
be disjoint. By being less aggressive when merging during layout, there are no
overlapping cases between tail-duplication and tail-merging, provided the
thresholds are disjoint.

There is a remaining TODO to benchmark the succ_size() test for non-layout tail
merging.

llvm-svn: 278265
 2016-08-10 18:36:18 +00:00
Paul Robinson 51fa0a87c3 Fix tests that used CHECK-NEXT-NOT and CHECK-DAG-NOT. 
FileCheck actually doesn't support combo suffixes.

Differential Revision: http://reviews.llvm.org/D17588

llvm-svn: 262054
 2016-02-26 19:40:34 +00:00
Krzysztof Parzyszek 1279881315 [Hexagon] Implement RDF-based post-RA optimizations 
- Handle simple cases of register copies (what current RDF CP allows).
- Hexagon-specific dead code elimination: handles dead address updates
  in post-increment instructions.

llvm-svn: 257504
 2016-01-12 19:09:01 +00:00