Messages in this thread |  | | | Date | Mon, 15 Nov 2010 23:43:22 +0100 | | From | Andi Kleen <> | | Subject | Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ? |
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> testcase shows that in 4.1/4.2/4.3/4.4 this is miscompiled only when using > -fno-ipa-reference, in 4.5 it is miscompiled always when optimizing > unless -fno-ipa-pure-const (as 4.5 added local-pure-const pass which is run > before ipa-reference) and in 4.6 this has been fixed by Honza when > doing ipa cleanups.
Maybe it would be better to simply change the kernel Makefiles to pass -fno-ipa-pure-const instead of adding volatiles everywhere.
-Andi
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