http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50751
--- Comment #9 from Oleg Endo <oleg.e...@t-online.de> 2011-10-27 09:23:47 UTC --- Created attachment 25625 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25625 Stripped reload test case from bzip2 (In reply to comment #8) > > and RA chooses r1 and r0 as the registers to where memories will > be loaded. The problem is we have no direct way to load buf1[4] > to r1. In such situation, a secondary reload is needed. See > the description of TARGET_SECONDARY_RELOAD in the gcc manual. > Here is a trial: Thanks a lot! > > The ICE for your testcase went away with it, though I've got > [...] > spill_failure, at reload1.c:2118 > > when bootstrapping. So this passes the ball to the mov.b (R0,Rn),Rm insn... The same happens with bzip2 in CSiBE. I have attached a stripped down snippet that reproduces the problem. IRA's last words on that one are: Using reg 2 for reload 0 Spilling for insn 365. Using reg 2 for reload 0 Spilling for insn 371. Using reg 3 for reload 0 Spilling for insn 374. Using reg 2 for reload 0 Spilling for insn 377. Using reg 0 for reload 1 reload failure for reload 2 Reloads for insn # 377 Reload 0: reload_in (SI) = (plus:SI (reg/f:SI 15 r15) (const_int 16 [0x10])) GENERAL_REGS, RELOAD_FOR_INPUT_ADDRESS (opnum = 2), can't combine reload_in_reg: (plus:SI (reg/f:SI 15 r15) (const_int 16 [0x10])) Reload 1: reload_in (SI) = (reg:SI 3 r3 [693]) R0_REGS, RELOAD_FOR_INPUT (opnum = 0) reload_in_reg: (reg:SI 3 r3 [693]) Reload 2: R0_REGS, RELOAD_FOR_INPUT_ADDRESS (opnum = 2), can't combine, secondary_reload_p Reload 3: reload_in (QI) = (mem/c:QI (plus:SI (reg/f:SI 15 r15) (const_int 16 [0x10])) [6 %sfp+-60 S1 A32]) GENERAL_REGS, RELOAD_FOR_INPUT (opnum = 2), can't combine reload_in_reg: (subreg:QI (reg/v:SI 177 [ curr ]) 0) secondary_in_reload = 2
