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LLVM does not use the old style simple isel any more.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42758 91177308-0d34-0410-b5e6-96231b3b80d8
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Evan Cheng
2007-10-08 17:54:24 +00:00
parent b428657504
commit 7794935327
1 changed files with 2 additions and 5 deletions
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docs/CodeGenerator.html
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@@ -748,11 +748,8 @@ explains how they work and some of the rationale behind their design.</p>
<p> <p>
Instruction Selection is the process of translating LLVM code presented to the Instruction Selection is the process of translating LLVM code presented to the
code generator into target-specific machine instructions. There are several code generator into target-specific machine instructions. There are several
well-known ways to do this in the literature. In LLVM there are two main forms: well-known ways to do this in the literature. LLVM uses a SelectionDAG based
the SelectionDAG based instruction selector framework and an old-style 'simple' instruction selector.
instruction selector, which effectively peephole selects each LLVM instruction
into a series of machine instructions. We recommend that all targets use the
SelectionDAG infrastructure.
</p> </p>
<p>Portions of the DAG instruction selector are generated from the target <p>Portions of the DAG instruction selector are generated from the target