4 Commits

Author	SHA1	Message	Date
Richard Sandiford	09a8cf3604	[SystemZ] Add LOC and LOCG ... As with the stores, these instructions can trap when the condition is false, so they are only used for things like (cond ? x : *ptr). llvm-svn: 187112	2013-07-25 09:04:52 +00:00
Richard Sandiford	9784649157	[SystemZ] Use MVC for simple load/store pairs ... Look for patterns of the form (store (load ...), ...) in which the two locations are known not to partially overlap. (Identical locations are OK.) These sequences are better implemented by MVC unless either the load or the store could use RELATIVE LONG instructions. The testcase showed that we weren't using LHRL and LGHRL for extload16, only sextloadi16. The patch fixes that too. llvm-svn: 185919	2013-07-09 09:46:39 +00:00
Richard Sandiford	b86a83488e	[SystemZ] Add conditional store patterns ... Add pseudo conditional store instructions, so that we use: branch foo: store foo: instead of: load branch foo: move foo: store z196 has real 32-bit and 64-bit conditional stores, but we don't use any z196 instructions yet. llvm-svn: 185065	2013-06-27 09:27:40 +00:00
Ulrich Weigand	5f613dfd1f	[SystemZ] Add back end ... This adds the actual lib/Target/SystemZ target files necessary to implement the SystemZ target. Note that at this point, the target cannot yet be built since the configure bits are missing. Those will be provided shortly by a follow-on patch. This version of the patch incorporates feedback from reviews by Chris Lattner and Anton Korobeynikov. Thanks to all reviewers! Patch by Richard Sandiford. llvm-svn: 181203	2013-05-06 16:15:19 +00:00