[Bug rtl-optimization/36438] gcc ICE compiling code with mmx builtin

[davidxl at gcc dot gnu dot org]

------- Comment #1 from davidxl at gcc dot gnu dot org  2008-06-05 06:41 -------

cse1 (RTL) does some expression simplification on the fly such as 

t = x << 4
r = t << 4

==>
r = x << 8

However for mmx shift operation, the mode (V1DI) for the const folding is
illegal -- resulting in ICE. 


-- 

davidxl at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |davidxl at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36438