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[PATCH, i386]: Fix PR50202, ICE: in final_scan_insn, at final.c:2709 (could not split insn) with __builtin_ia32_pcmpistri128

From: Uros Bizjak <ubizjak at gmail dot com>
To: gcc-patches at gcc dot gnu dot org
Date: Sat, 27 Aug 2011 09:54:31 +0200
Subject: [PATCH, i386]: Fix PR50202, ICE: in final_scan_insn, at final.c:2709 (could not split insn) with __builtin_ia32_pcmpistri128

Hello!

Attached patch fixes corner case with -fno-dse, where the insn has all
outputs unused. Do not bother with the insn in this case and simply
delete it from splitter.

2011-08-27  Uros Bizjak  <ubizjak@gmail.com>

	PR target/50202
	* config/i386/sse.md (sse4_2_pcmpestr): Emit NOTE_INSN_DELETED note
	when all outputs are unused.
	(sse4_2_pcmpistr): Ditto.

testsuite/ChangeLog:

2011-08-27  Uros Bizjak  <ubizjak@gmail.com>

	PR target/50202
	* gcc.target/i386/pr50202.c: New test.

Bootstrapped and regression tested on x86_64-pc-linux-gnu  {,-m32}.
Committed to mainline SVN and to 4.6.

Uros.

Attachment: p.diff.txt
Description: Text document

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