From: Evan Cheng Date: Mon, 8 Oct 2007 17:54:24 +0000 (+0000) Subject: LLVM does not use the old style simple isel any more. X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=779493532794e32ae70a108e76fee97130aaae29;p=oota-llvm.git LLVM does not use the old style simple isel any more. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42758 91177308-0d34-0410-b5e6-96231b3b80d8 --- diff --git a/docs/CodeGenerator.html b/docs/CodeGenerator.html index bc82b46735b..b454b6b9d0b 100644 --- a/docs/CodeGenerator.html +++ b/docs/CodeGenerator.html @@ -748,11 +748,8 @@ explains how they work and some of the rationale behind their design.

Instruction Selection is the process of translating LLVM code presented to the 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: -the SelectionDAG based instruction selector framework and an old-style 'simple' -instruction selector, which effectively peephole selects each LLVM instruction -into a series of machine instructions. We recommend that all targets use the -SelectionDAG infrastructure. +well-known ways to do this in the literature. LLVM uses a SelectionDAG based +instruction selector.

Portions of the DAG instruction selector are generated from the target