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