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Re: [4.1 Committed] PR middle-end/26729: Fold vs. TREE_OVERFLOW
- From: Roger Sayle <roger at eyesopen dot com>
- To: Richard Guenther <richard dot guenther at gmail dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Sun, 14 May 2006 09:34:15 -0600 (MDT)
- Subject: Re: [4.1 Committed] PR middle-end/26729: Fold vs. TREE_OVERFLOW
On Sun, 14 May 2006, Richard Guenther wrote:
> Doh, yes. I looked up more context from the sources and it's all clear
> now. Now the only thing left is if you did look at the 14 other places
> !integer_zerop is used in fold_const.c? At least a bunch of them look
> suspicious from a quick look (I'll have a closer look tomorrow and try to
> produce some testcases that fail).
These are all correctly fixed on mainline, so you'll need to confirm
that any issues you find are regressions in 4.0 and 4.1 if we're to
consider an en-mass TREE_OVERFLOW clean-up backport or individual fixes.
But I appreciate your offer to investigate further, it'll be good to
understand how widespread latent TREE_OVERFLOW issues were/are.
Thanks in advance,