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Re: [avr-gcc-list] Inversion of logic improves size speed

From: Joerg Wunsch
Subject: Re: [avr-gcc-list] Inversion of logic improves size speed
Date: Mon, 6 Aug 2007 07:08:41 +0200 (MET DST)

"Wouter van Gulik" <address@hidden> wrote:

> Is this a (known?) bug or am I missing something?

It's not strictly a bug but a "missed optimization".  Could you fill
in a bugzilla report on GCC for this?  If you replace the "uint8_t" by
"unsigned char", no further preprocessing is needed, so you can
attacht that example directly to the report.  Please do also attach
the *generated* assembly code (rather than the disassembly listing),
this is what you get by using the -S compiler option.

cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)

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