On 13-02-07 7:27 PM, Jakub Jelinek wrote:
Hi!As the following testcase shows, get_reload_reg could sometimes return a reused reg in a wrong mode. If curr_insn_input_reloads[i].input and original have VOIDmode, they could compare equal (same integer constant), yet mode might be different from GET_MODE (curr_insn_input_reloads[i].reg). If we need a wider reg than we already have, we can't reuse it easily, but if we need a narrower one, we can just use a subreg of the wider one. Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk? 2013-02-07 Jakub Jelinek <ja...@redhat.com> PR rtl-optimization/56195 * lra-constraints.c (get_reload_reg): Don't reuse regs if they have smaller mode than requested, if they have wider mode than requested, try to return a SUBREG. * gcc.dg/torture/pr56195.c: New test.
Sure, Jakub. Thanks.
