Evan Cheng
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5e88d90379
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If def is in the same mbb as the barrier, spilt the value after the last use before the barrier.
llvm-svn: 58314
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2008-10-28 05:28:21 +00:00 |
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Evan Cheng
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9f854697e4
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Add command line option to limit the number splits to help debugging.
llvm-svn: 58312
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2008-10-28 01:48:24 +00:00 |
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Evan Cheng
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fab31680e1
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Avoid putting a split past the end of the live range; always shrink wrap live interval in the barrier mbb.
llvm-svn: 58309
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2008-10-28 00:47:49 +00:00 |
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Evan Cheng
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e67ad47a00
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Silence a bogus compile time warning.
llvm-svn: 58297
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2008-10-27 23:29:28 +00:00 |
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Evan Cheng
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f46642ada6
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Remove val# defined by a remat'ed def that is now dead.
llvm-svn: 58294
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2008-10-27 23:21:01 +00:00 |
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Evan Cheng
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f713722975
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For now, don't split live intervals around x87 stack register barriers. FpGET_ST0_80 must be right after a call instruction (and ADJCALLSTACKUP) so we need to find a way to prevent reload of x87 registers between them.
llvm-svn: 58230
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2008-10-27 07:14:50 +00:00 |
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Evan Cheng
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ed033ede22
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Do not shrink wrap live interval in a mbb if it's livein any of its successor blocks. The mbb can be revisited again after all of the successors are processed.
llvm-svn: 58184
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2008-10-26 07:49:03 +00:00 |
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Evan Cheng
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f48367b8e9
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Handle cases where there aren't uses in the barrier mbb.
llvm-svn: 58174
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2008-10-25 23:49:39 +00:00 |
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Evan Cheng
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85d71d4588
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If val# def is ~0U, meaning it's defined by a PHI, and it's previously split, spill before the barrier because it's impossible to determine if all the defs are spilled in the same spill slot.
llvm-svn: 58129
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2008-10-25 00:52:41 +00:00 |
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Evan Cheng
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cd160f9859
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Fix a pasto.
llvm-svn: 58102
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2008-10-24 18:46:44 +00:00 |
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Evan Cheng
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f8b09d424d
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Fix a end() dereference; remove an abort() that wasn't meant to be left in.
llvm-svn: 58072
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2008-10-24 05:53:44 +00:00 |
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Evan Cheng
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4bac4d0a16
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Avoid splitting an interval multiple times; avoid splitting re-materializable val# (for now).
llvm-svn: 58068
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2008-10-24 02:05:00 +00:00 |
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Evan Cheng
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d0d0317b9a
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Committing a good chunk of the pre-register allocation live interval splitting pass. It's handling simple cases and appear to do good things. Next: avoid splitting an interval multiple times; renumber registers when possible; record stack slot live intervals for coloring; rematerialize defs when possible.
llvm-svn: 58044
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2008-10-23 20:43:13 +00:00 |
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Evan Cheng
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7e721ecd21
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Add skeleton for the pre-register allocation live interval splitting pass.
llvm-svn: 57847
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2008-10-20 21:44:59 +00:00 |
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