Re: Another Issue in Compiler Generated Assembly Code (Todd P. Whitesel)
Wed, 24 Feb 1993 09:31:22 GMT

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Another Issue in Compiler Generated Assembly Code forrest@nobozo.CS.Berkeley.EDU (1993-02-23)
Re: Another Issue in Compiler Generated Assembly Code (1993-02-24)
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Newsgroups: comp.compilers
From: (Todd P. Whitesel)
Keywords: assembler
Organization: California Institute of Technology, Pasadena
References: 93-02-128
Date: Wed, 24 Feb 1993 09:31:22 GMT

forrest@nobozo.CS.Berkeley.EDU (Jon Forrest) writes:
>Another issue for compiler writers to keep in mind is that if their
>compiler produces assembly code, then it should 1) produce assembly code
>that the assembler can actually assemble, and 2) produce assembly code
>that, when assembled, is the same as the object code produced by the

I quite agree with #1, because one fast way to get a new compiler up and
running is to have it push off a lot of tasks onto the assembler;
naturally you have to output assembly that will be accepted if this is
going to work.

However, #2 is a bit unreasonable for third party compiler writers. It
would require the very last stage of the compiler to duplicate the second
half of the local assembler; this is wasteful enough, but what really
gives it problems is trying to support multiple assemblers that accept
essentially the same syntax but have quite different ideas of how to
organize things. Sure, it would be nice, but it has a tendency to be
impractical in a multiplatform environment.

Todd Whitesel
toddpw @

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