------- Comment #6 from steven at gcc dot gnu dot org 2006-07-22 11:08 -------
In the greg dump we have this RTL:
(insn:HI 10 8 11 2 (parallel [
(set (reg:SI 58 [ D.1540 ])
(plus:SI (reg/v:SI 5 di [ reg ])
(const_int -4 [0xfffffffffffffffc])))
(clobber (reg:CC 17 flags))
]) 208 {*addsi_1} (nil)
(expr_list:REG_UNUSED (reg:CC 17 flags)
(expr_list:REG_DEAD (reg/v:SI 5 di [ reg ])
(expr_list:REG_UNUSED (reg:CC 17 flags)
(nil)))))
(insn:HI 11 10 12 2 (set (reg/v:SI 5 di [ reg ])
(reg:SI 58 [ D.1540 ])) 40 {*movsi_1} (insn_list:REG_DEP_TRUE 10 (nil))
(nil))
(insn:HI 12 11 13 2 (set (reg:CCNO 17 flags)
(compare:CCNO (mem:SI (reg:SI 58 [ D.1540 ]) [3 S4 A32])
(const_int 0 [0x0]))) 3 {*cmpsi_ccno_1} (nil)
(expr_list:REG_DEAD (reg:SI 58 [ D.1540 ])
(nil)))
reg 5 and pseudoreg 58 can share the same hard register (i.e. 58 renumbers to
5) but GCC concludes that the two regs conflict.
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21596
