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12 Commits

Author SHA1 Message Date
David Goodwin
3e72d301e0 Fix a couple of problems with maintaining liveness information for antidep breaking. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89404 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-19 23:12:37 +00:00
David Goodwin
87d21b92fc Allow target to specify regclass for which antideps will only be broken along the critical path. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88682 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-13 19:52:48 +00:00
David Goodwin
12dd99dc30 Rename registers to break output dependencies in addition to anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@87015 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-12 19:08:21 +00:00
David Goodwin
0855dee564 Allow targets to specify register classes whose member registers should not be renamed to break anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86628 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-10 00:15:47 +00:00
David Goodwin
7040d6e2f5 Fix bug in aggressive antidep breaking; liveness was not updated correctly for regions that do not have antidep candidates. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86172 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 21:06:09 +00:00
David Goodwin
98f2f1aff8 Replace std::map.at() with std::map[]. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86102 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 01:45:50 +00:00
David Goodwin
54097836f3 Break anti-dependencies using free registers in a round-robin manner to avoid introducing new anti-dependencies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86098 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-05 01:19:35 +00:00
David Goodwin
4de099d8ca Do a scheduling pass ignoring anti-dependencies to identify candidate registers that should be renamed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85939 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-11-03 20:57:50 +00:00
David Goodwin
5b3c308970 Between scheduling regions, correctly maintain anti-dep breaking state so that we don't incorrectly rename registers that span these regions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85537 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 23:30:59 +00:00
David Goodwin
67a8a7b3bd Fix a couple of bugs in aggressive anti-dep breaking. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85522 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-29 19:17:04 +00:00
David Goodwin
e10deca33e Allow the aggressive anti-dep breaker to process the same region multiple times. This is necessary because new anti-dependencies are exposed when "current" ones are broken. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85166 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 22:31:16 +00:00
David Goodwin
348777110a Add aggressive anti-dependence breaker. Currently it is not the default for any target. Enable with -break-anti-dependencies=all. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85145 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-26 19:32:42 +00:00