[Bug target/19102] [3.4 Regression] -march=pentium3 breaks linux kernel compiles w/ gcc-3_4-branch as of 2004/12/20

[ebotcazou at gcc dot gnu dot org]

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2004-12-22 20:24 -------
> > Why do we allow MMX modes in SSE regs now?
> 
> Because x86-64 calling conventions demand it.

The calling conventions for vector types I presume?  The problem is that SImode
slipped through the cracks so the register allocator now jumps from SIREG to
INT_SSE_REGS for SImode pseudos.  Is that an unintended side-effect?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19102