[Bug tree-optimization/55875] [4.8 Regression] IVopts caused miscompilation

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55875 --- Comment #4 from rakdver at iuuk dot mff.cuni.cz 2013-01-07 14:09:18 UTC --- this is correct, since it is done in unsigned int. Next we do: res = chrec_convert (type, chrec1, at_stmt); Eventually we go to convert_affine_scev

[Bug middle-end/55481] [4.8 regression] -O2 generates a wrong-code infinite loop in C++Benchmark's simple_types_constant_folding int8 xor test

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55481 --- Comment #13 from rakdver at iuuk dot mff.cuni.cz 2012-11-28 16:19:11 UTC --- now, but iv-no_overflow is false (and IVOPTs nowhere uses that flag ...). I can fix this for example with Index: tree-ssa-loop-ivopts.c