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Added some isel ideas.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24757 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -88,3 +88,17 @@ into:
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movzbl %dil, %eax
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xorl $1, %eax
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ret
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//===---------------------------------------------------------------------===//
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Some isel ideas:
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1. Dynamic programming based approach when compile time if not an
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issue.
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2. Code duplication (addressing mode) during isel.
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3. Other ideas from "Register-Sensitive Selection, Duplication, and
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Sequencing of Instructions".
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//===---------------------------------------------------------------------===//
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Should we promote i16 to i32 to avoid partial register update stalls?
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