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Re: [tree-ssa] Switch stmts and inserting on edge
- From: Chris Lattner <sabre at nondot dot org>
- To: Diego Novillo <dnovillo at redhat dot com>
- Cc: Andrew Macleod <amacleod at redhat dot com>, <gcc at gcc dot gnu dot org>
- Date: Fri, 30 May 2003 14:06:15 -0500 (CDT)
- Subject: Re: [tree-ssa] Switch stmts and inserting on edge
> The problem is that SWITCH_EXPRs still have implicit semantics that are
> getting in the way. I think this ought to be fixed by finishing Jason's
> patch to expose SWITCH_EXPRs as explicit multi-way branches, or even
> decision trees.
FWIW, this is what LLVM does, and it works quite well. All fall-throughs
are made into explicit gotos (the labels being merged if appropriate), and
switch statements become multiway branches.
-Chris
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