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constraints.md (Ya): New internal constraint.
* config/i386/constraints.md (Ya): New internal constraint.
* config/i386/i386.md (zero_extendsidi2): Remove expansion.
(*zero_extendsidi2_rex64): Add x,x alternative.
(*zero_extendsidi2): Ditto. Add o,0 alternative.
Remove flags reg clobber. Adjust corresponding splits.
(zero_extend<mode>si2): Macroize expander from zero_extendhisi2 and
zero_extendqisi2 expanders using SWI12 mode iterator.
(zero_extend<mode>si2_and): Macroize insn from
zero_extendhisi2_and and zero_extendqisi2_and. Merge corresponding
splitters.
(*zero_extend<mode>si2): Macroize insn from
*zero_extendhisi2_movzbl and *zero_extendqisi2_movzbl.
(*zero_extend*2_movzbl_and): Remove insn patterns.
(zero_extendqihi2_and): Merge corresponding splitter.
(*zero_extendqihi2): Rename from *zero_extendqihi2_movzbl.
(*zero_extend*2_movzbl_and): Remove insn patterns.
(*anddi_1): Split TYPE_IMOVX instructions.
(*andsi_1): Use Ya for alternative 2. Split TYPE_IMOVX instructions.
(*andhi_1): Ditto.
(and->zext splitter): Add splitter pattern.
(zero extend with andsi3 splitter): Adjust zero_extend pattern.
From-SVN: r184891
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