re PR target/78904 (zero-extracts are not effective)

	PR target/78904
	* config/i386/i386.md (addqi_ext_1): Canonicalize insn pattern w.r.t.
	zero_extract RTXes.
	(*addqi_ext_2): Ditto.
	(testqi_ext_ccno_0): Canonicalize expander w.r.t. zero_extract RTXes.
	(testqi_ext_1_ccno): Rename from testqi_ext_ccno_0.
	(*testqi_ext_0): Merge with *testqi_ext_1.
	(*testqi_ext_1): Canonicalize insn pattern w.r.t. zero_extract RTXes.
	Update corresponding splitter.
	(*testqi_ext_2): Canonicalize insn pattern w.r.t. zero_extract RTXes.
	(*andqi_ext_0): Merge with *andqi_ext_1.
	(andqi_ext_1): Canonicalize insn pattern w.r.t. zero_extract RTXes.
	Rename from *andqi_ext_1.  Update corresponding splitter and
	peephole2 patterns.
	(*andqi_ext_1_cc): Rename from *andqi_ext_0_cc.
	(*andqi_ext_2): Canonicalize insn pattern w.r.t. zero_extract RTXes.
	(*<any_or:code>qi_ext_0): Merge with *andqi_ext_1.
	(*<any_or:code>qi_ext_1): Canonicalize insn pattern w.r.t.
	zero_extract RTXes.  Update corresponding splitter.
	(*<any_or:code>qi_ext_2): Canonicalize insn pattern w.r.t.
	zero_extract RTXes.
	(xorqi_cc_ext_1): Canonicalize expander w.r.t. zero_extract RTXes.
	(xorqi_ext_1_cc): Rename from xorqi_cc_ext_1.
	(*xorqi_cc_ext_1): Canonicalize insn pattern w.r.t. zero_extract RTXes.
	Update corresponding splitter.
	(*xorqi_ext_1_cc): Rename from *xorqi_cc_ext_1.
	(isinfxf2): Update calls to renamed expanders.
	(isinf<mode>2): Ditto.
	* config/i386/i386.c (ix86_expand_fp_compare): Ditto.
	(ix86_emit_fp_unordered_jump): Ditto.
	(ix86_emit_i387_round): Ditto.

testsuite/ChangeLog:

	PR target/78904
	* gcc.target/i386/pr78904.c: New test.

From-SVN: r243929