Re: [PATCH] Implementing Swing Modulo Scheduling in GCC

[Sebastian Pop <sebastian dot pop at cri dot ensmp dot fr>]

Testing in progress on IA64.

On ia32 I get the following error: 

stage1/xgcc -Bstage1/ -B/usr/local/i686-pc-linux-gnu/bin/ -c   -O2 -g -fmodulo-sched -fschedule-ins
ns -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long
-long -Wno-variadic-macros -Wold-style-definition -Werror -fno-common   -DHAVE_CONFIG_H    -I. -I. 
-I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/../include  ../../gcc/gcc/fold-const.c -o fold-co
nst.o
../../gcc/gcc/fold-const.c: In function `div_and_round_double':
../../gcc/gcc/fold-const.c:806: error: unable to find a register to spill in class `AREG'
../../gcc/gcc/fold-const.c:806: error: this is the insn:
(insn:HI 192 188 1406 15 ../../gcc/gcc/fold-const.c:602 (parallel [
            (set (reg:SI 2 cx [129])
                (const_int 0 [0x0]))
            (set (reg/f:SI 5 di [369])
                (plus:SI (ashift:SI (reg:SI 2 cx [118])
                        (const_int 2 [0x2]))
                    (reg/f:SI 3 bx [126])))
            (set (mem/s:BLK (reg/f:SI 3 bx [126]) [56 den+0 S16 A128])
                (const_int 0 [0x0]))
            (use (reg:SI 1 dx [117]))
            (use (reg:SI 2 cx [118]))
            (use (reg:SI 19 dirflag))
        ]) 462 {*rep_stossi} (insn_list 187 (insn_list 174 (insn_list 173 (insn_list 188 (nil)))))
    (expr_list:REG_DEAD (reg:SI 19 dirflag)
        (expr_list:REG_DEAD (reg:SI 1 dx [117])
            (expr_list:REG_DEAD (reg:SI 2 cx [118])
                (expr_list:REG_UNUSED (reg/f:SI 5 di [369])
                    (expr_list:REG_UNUSED (reg:SI 2 cx [129])
                        (nil)))))))
../../gcc/gcc/fold-const.c:806: internal compiler error: in spill_failure, at reload1.c:1887
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