PR target/19010
* config/i386/i386.c (ix86_must_pass_in_stack): Don't return true
for TImode vectors.
(gen_reg_or_parallel): New.
(function_arg): Use it.
(ix86_hard_regno_mode_ok): Test SSE1 and SSE2 separately,
MMX and 3DNOW separately.
(ix86_rtx_costs): Simplify FLOAT_EXTEND case.
(ix86_vector_mode_supported_p): Test SSE1 and SSE2 separately.
* config/i386/i386.h (VALID_SSE2_REG_MODE): Move SSE2 cases from ...
(VALID_SSE_REG_MODE): ... here.
* gcc.target/i386/i386.exp: New harness.
* gcc.target/i386/vect-args.c: New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@92205 138bc75d-0d04-0410-961f-82ee72b054a4