Evan Cheng
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5196018d9c
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Don't waste time trying to CSE labels, phis, inline asm. Definitely avoid cse implicit-def for obvious performance reason.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98009 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-08 23:49:12 +00:00 |
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Evan Cheng
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6c3b8ac6c9
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Restrict machine cse to really trivial coalescing. Leave the heavy lifting to a real coalescer.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98007 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-08 23:28:08 +00:00 |
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Evan Cheng
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6cc1aeaad2
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Don't update physical register def.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97861 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-06 01:14:19 +00:00 |
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Evan Cheng
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a5f32cb3d3
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Avoid cse load instructions unless they are known to be invariant loads.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97747 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-04 21:18:08 +00:00 |
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Evan Cheng
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b3958e8032
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Look ahead a bit to determine if a physical register def that is not marked dead is really alive. This is necessary to catch a lot of common cse opportunities for targets like x86.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97706 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-04 01:33:55 +00:00 |
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Evan Cheng
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67bda7215b
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Fix a logic error. An instruction that has a live physical register def cannot be CSE'ed, but it *can* be used to replace a common subexpression.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97688 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-03 23:59:08 +00:00 |
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Evan Cheng
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05bdcbb1ae
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Re-apply r97667 but with a little bit of thought put into the patch. This implements a special DenseMapInfo trait for DenseMap<MachineInstr*> that compare the value of the MachineInstr rather than the pointer value. Since the hashing and equality test functions ignore defs it's useful for doing CSE kind optimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97678 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-03 23:27:36 +00:00 |
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Dan Gohman
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319dfa3fb3
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Revert 97667. It broke a bunch of tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97673 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-03 22:40:03 +00:00 |
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Evan Cheng
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a054ae02fd
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Move DenseMapInfo for MachineInstr* to MachineInstr.h
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97667 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-03 21:47:16 +00:00 |
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Evan Cheng
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16b48b8a05
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Machine CSE work in progress. It's doing some CSE now. But implicit def of physical registers are getting in the way.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97664 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-03 21:20:05 +00:00 |
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Evan Cheng
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6ba9554988
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Work in progress. Finding some cse now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97635 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-03 02:48:20 +00:00 |
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Evan Cheng
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c5bbba1e49
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Fix typo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97577 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-02 19:02:27 +00:00 |
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Evan Cheng
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c6fe333688
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Add skeleton of a machine level cse pass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97543 91177308-0d34-0410-b5e6-96231b3b80d8
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2010-03-02 02:38:24 +00:00 |
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