[Bug c/17865] Bad code generation (using -O2 and -O3) on x86 target when using the listed snippet

[bangerth at dealii dot org]

------- Additional Comments From bangerth at dealii dot org  2004-10-06 18:41 -------
Andrew is right: some codes break because only higher optimization 
levels do certain aggressive transformations, and work when lower 
optimizations are used. There is not much we can do about it, apart 
from asking our users to fix their codes. The manual contains a 
section on aliasing problems, and how to avoid them. 
 
W. 

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17865