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[Bug target/63949] Aarch64 instruction combiner does not optimize subsi_sxth function as expected (gcc.target/aarch64/extend.c fails)
- From: "vekumar at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 19 Dec 2014 11:52:02 +0000
- Subject: [Bug target/63949] Aarch64 instruction combiner does not optimize subsi_sxth function as expected (gcc.target/aarch64/extend.c fails)
- Auto-submitted: auto-generated
- References: <bug-63949-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63949
--- Comment #5 from vekumar at gcc dot gnu.org ---
Richard, what the function get_best_reg_extraction_insn is supposed to do in
make_extraction ?