[Bug rtl-optimization/55193] [4.8 Regression] ICE in in simplify_const_unary_operation, at simplify-rtx.c:1659

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55193



Jakub Jelinek <jakub at gcc dot gnu.org> changed:



           What    |Removed                     |Added

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             Status|NEW                         |ASSIGNED

         AssignedTo|unassigned at gcc dot       |jakub at gcc dot gnu.org

                   |gnu.org                     |



--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-12-10 
17:53:01 UTC ---

Created attachment 28915

  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28915

gcc48-pr55193.patch



Untested fix.  For changes to DEBUG_INSNs, generally simplify_replace_fn_rtx

is the best thing, it takes care of simplifying everything that is needed, both

for the cases where something changes from non-VOIDmode into VOIDmode (then

simplification is required; e.g. as on this testcase (zero_extend:DI (reg:SI

eax) 0) where eax is replaced by (const_int 0)), and a nice thing to have

otherwise.