[Bug tree-optimization/54713] [4.8 Regression] error: non-trivial conversion at assignment in gcc.c-torture/compile/pr53410-2.c

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54713



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



           What    |Removed                     |Added

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                 CC|                            |jakub at gcc dot gnu.org



--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-09-26 
09:19:55 UTC ---

I think this is a bug in fold_ternary_loc.  The thing is that forwprop tries to

simplify_bitfield_ref, _24 = BIT_FIELD_REF <_9, 32, 0>, where _9 is TImode

4xint

vector, _24 is int, and _9 = { _20, _23 }; where _20 and _23 are V2SI vectors.

Fold then assumes that a vector CONSTRUCTOR will only contain scalars, not

shorter vectors, and returns the first vector as whole.