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Re: [Patch] PR 61692 - Fix for inline asm ICE

On 7/28/2014 12:42 PM, Jeff Law wrote:
On 07/27/14 01:26, David Wohlferd wrote:
I'm not sure which maintainer to cc for inline asm stuff?

I have a release on file with the FSF, but don't have SVN write access.

extract_insn() in recog.c will ICE if (noperands > MAX_RECOG_OPERANDS).
Normally this isn't a problem since expand_asm_operands() in cfgexpand.c
catches and reports a proper error for this condition.  However,
expand_asm_operands() only checks (ninputs + noutputs) instead of
(ninputs + noutputs + nlabels), so you can get the ICE when using "asm
goto."  See the bugzilla entry for sample code.

2014-07-27  David Wohlferd  <>

         PR target/61692
         * cfgexpand.c (expand_asm_operands): Count all inline asm
You should also include 'nclobbers'.

Reading thru asm_noperands (which is what extract_insn uses to count operands), I would have thought you were right. But while making this fail with nLabels was easy, I wasn't able to get this to ICE at all using clobbers (30 labels + 11 clobbers still didn't ICE).

And I'm reluctant to propose that change unless I can see it fail.


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