[Bug optimization/10469] [3.3, 3.4] constant V4SF loads get moved inside loop

[rth at gcc dot gnu dot org]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10469


rth@gcc.gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned@gcc.gnu.org      |matz@suse.de


------- Additional Comments From rth@gcc.gnu.org  2003-06-18 00:38 -------
At least on x86, the load within the loop comes from reload.  The pseudo that
holds the V4SF temporary (right from the beginning mind!) gets forced to memory
because of the subregs; we then reload the pseudo as necessary, which results
in the load within the loop.

With -fnew-ra, we get an ICE:
zz.c:19: internal compiler error: in subreg_hard_regno, at emit-rtl.c:1087

Assigning the bug to Michael, since the current problem can't be solved without
the new register allocator, and because of the ICE.