Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os

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Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os

From:	Thomas D. Dean
Subject:	Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os
Date:	Thu, 15 May 2008 09:24:16 -0700 (PDT)

> The result of the atan2 does not impact the bit value written to PORTA, 
> so the compiler is free to re-order it.  That's what optimizers do.

If I change atan2() to sin() the compiler keeps the correct sequence.

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Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, (continued)
- Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, hutchinsonandy, 2008/05/15
  - Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, Thomas D. Dean, 2008/05/15
    - Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, Blake Leverett, 2008/05/15
- Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, Alex Wenger, 2008/05/15
- Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, David Brown, 2008/05/15
  - Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, Thomas D. Dean, 2008/05/15
- FW: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os, Ron Kreymborg, 2008/05/23

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