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4 Commits

Author SHA1 Message Date
Owen Anderson
03e1ab9c5b Teach tblgen's set theory "sequence" operator to support an optional stride operand. 
llvm-svn: 157416
 2012-05-24 21:37:08 +00:00
Jakob Stoklund Olesen
3ff9738293 Add an (interleave A, B, ...) SetTheory operator. 
This will interleave the elements from two or more lists.

llvm-svn: 148824
 2012-01-24 18:06:05 +00:00
Peter Collingbourne
78a1609fa2 s/tblgen/llvm-tblgen/g in a few missed places, including the tests 
llvm-svn: 141294
 2011-10-06 13:39:59 +00:00
Jakob Stoklund Olesen
9c97bf91c0 Teach TableGen to evaluate DAG expressions as set operations. 
A TableGen backend can define how certain classes can be expanded into
ordered sets of defs, typically by evaluating a specific field in the
record. The SetTheory class can then evaluate DAG expressions that refer
to these named sets.

A number of standard set and list operations are predefined, and the
backend can add more specialized operators if needed. The -print-sets
backend is used by SetTheory.td to provide examples.

This is intended to simplify how register classes are defined:

  def GR32_NOSP : RegisterClass<"X86", [i32], 32, (sub GR32, ESP)>;

llvm-svn: 132621
 2011-06-04 04:11:37 +00:00