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Re: c/6543: Internal compiler error in extract_insn, at recog.c:2132

At 17:26 03.05.2002, David Edelsohn wrote:
> >>>>> sirl  writes:
>Franz> Actually another incarnation of the CLOBBER problem, but harder to 
>fix this time. This pattern around line 10730 in is the culprit:
>Franz> (define_insn ""
>Franz> [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r,r,r,r")
>Franz> (eq:SI (match_operand:SI 1 "gpc_reg_operand" "%r,r,r,r,r")
>Franz> (match_operand:SI 2 "reg_or_cint_operand" "r,O,K,L,I")))
>Franz> (clobber (match_scratch:SI 3 "=r,&r,r,r,r"))]
>Franz> "! TARGET_POWERPC64"
>Franz> "@
>Franz> xor %0,%1,%2\;{sfi|subfic} %3,%0,0\;{ae|adde} %0,%3,%0
>Franz> {sfi|subfic} %3,%1,0\;{ae|adde} %0,%3,%1
>Franz> {xoril|xori} %0,%1,%b2\;{sfi|subfic} %3,%0,0\;{ae|adde} %0,%3,%0
>Franz> {xoriu|xoris} %0,%1,%u2\;{sfi|subfic} %3,%0,0\;{ae|adde} %0,%3,%0
>Franz> {sfi|subfic} %0,%1,%2\;{sfi|subfic} %3,%0,0\;{ae|adde} %0,%3,%0"
>Franz> [(set_attr "length" "12,8,12,12,12")])
>         This is another splitter that used the pattern we changed to fix
>the earlier splitter.  Why can't we simply recognize the clobber but then
>never use it when we split the instruction?

Yeah, and this is actually something that changed during the last few 
weeks, I successfully compiled libtool with gcc-3.1 on Apr 11.


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