Commit Graph

2 Commits

Author SHA1 Message Date
Gordon Henriksen 7843c16f31 CollectorMetadata and Collector are rejiggered to get along with
per-function collector model. Collector is now the factory for
CollectorMetadata, so the latter may be subclassed.

llvm-svn: 44827
2007-12-11 00:30:17 +00:00
Gordon Henriksen 613afce430 CollectorMetadata abstractly describes stack maps for a function.
It includes:

 - location and of each safe point in machine code (identified by a
   label)
 - location of each root within the stack frame (identified by an
   offset), including the metadata tag provided to llvm.gcroot in
   the user program
 - size of the stack frame (for collectors which want to cheat on
   stack crawling :)
 - and eventually will include liveness

It is to be populated by back-ends during code-generation.

CollectorModuleMetadata aggregates this information across the
entire module.

llvm-svn: 42418
2007-09-27 22:18:46 +00:00