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Re: i386 non-matching patterns

To: tege at swox dot com (Torbjorn Granlund)
Subject: Re: i386 non-matching patterns
From: Joern Rennecke <amylaar at redhat dot com>
Date: Fri, 17 Nov 2000 17:09:39 +0000 (GMT)
Cc: gcc at gcc dot gnu dot org, user42 at zip dot com dot au

> The requirement that clobbered hard regs may not be explicitly
> mentioned in the combined pattern seems very strange.  Can somebody
> please explain why this is needed?

The new instruction must not clobber a live hard register.
However, the test seems unable to detect any case where the register is
not live :-(

References:
- i386 non-matching patterns
  - From: Torbjorn Granlund

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