[Bug tree-optimization/59014] [4.9 Regression] wrong code at -Os and above on x86_64-linux-gnu
mpolacek at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Nov 6 21:26:00 GMT 2013
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59014
--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #4)
> Why does it think that a.1_5 must be 0?
That's because VRP is innocent here after all, it's the forwprop1 what does
- _6 = a.1_5 & 1;
- _7 = (_Bool) _6;
+ _7 = (_Bool) a.1_5;
More (hopefully) tomorrow...
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