[Bug rtl-optimization/18420] [4.0 Regression] ICE compiling mesa at -O2

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-11-11 02:04 -------
Jan you added that code to simplify_subreg but I could not figure out why it was really added except 
that it effected x86_64 (when bootstrapped with -fomit-frame-pointer).  Note in this case the mode the 
modes are the same size which is unlike the case you found.

Reference: 
http://gcc.gnu.org/ml/gcc-patches/2001-05/msg01737.html
http://gcc.gnu.org/ml/gcc-patches/2001-05/msg01729.html

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                 CC|                            |hubicka at gcc dot gnu dot
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18420