[Bug tree-optimization/26144] with -O3 and pointer casts, gcc skips if

--- Comment #3 from pinskia at gcc dot gnu dot org 2006-02-09 01:02 --- You are violating aliasing rules which is why this does not work at -O3. Either access the variable ptr as a "struct blah *" or use -fno-strict-aliasing. *** This bug has been marked as a duplicate of 21920 ***

[Bug tree-optimization/26144] with -O3 and pointer casts, gcc skips if

--- Comment #2 from devin at freeshell dot org 2006-02-07 17:07 --- I could reproduce it with that dated build. And it isn't just debian but also the buildroot gcc. Here is the assembly produced from -O3. Following that is the assembly from -O2. What seems to happen is that with -O3

[Bug tree-optimization/26144] with -O3 and pointer casts, gcc skips if

--- Comment #1 from pinskia at gcc dot gnu dot org 2006-02-07 00:53 --- I cannot reproduce this at all with 4.0.3 20051105. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26144