Evan Cheng
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23066288fd
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58230 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-27 07:14:50 +00:00 |
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Evan Cheng
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aaf510c932
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58184 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-26 07:49:03 +00:00 |
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Evan Cheng
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79d5b5acae
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Handle cases where there aren't uses in the barrier mbb.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58174 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-25 23:49:39 +00:00 |
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Evan Cheng
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78dfef771b
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58129 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-25 00:52:41 +00:00 |
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Evan Cheng
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56ab0def90
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Fix a pasto.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58102 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-24 18:46:44 +00:00 |
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Evan Cheng
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2efe3fd79a
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Fix a end() dereference; remove an abort() that wasn't meant to be left in.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58072 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-24 05:53:44 +00:00 |
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Evan Cheng
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06587497dc
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Avoid splitting an interval multiple times; avoid splitting re-materializable val# (for now).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58068 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-24 02:05:00 +00:00 |
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Evan Cheng
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f5cd4f0d70
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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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58044 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-23 20:43:13 +00:00 |
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Evan Cheng
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09e8ca8a58
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Add skeleton for the pre-register allocation live interval splitting pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57847 91177308-0d34-0410-b5e6-96231b3b80d8
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2008-10-20 21:44:59 +00:00 |
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