i386.md (movsi_xor): Export.
* i386.md (movsi_xor): Export. (setcc peep2): Use it when available; add an alternative to match zero_extendhisi2_and. From-SVN: r46107
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@ -1,3 +1,9 @@
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2001-10-08 Richard Henderson <rth@redhat.com>
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* i386.md (movsi_xor): Export.
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(setcc peep2): Use it when available; add an alternative to
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match zero_extendhisi2_and.
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2001-10-08 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
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* romp-protos.h (romp_initialize_trampoline): New function.
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@ -1711,7 +1711,7 @@
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[(set_attr "type" "pop")
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(set_attr "mode" "SI")])
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(define_insn "*movsi_xor"
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(define_insn "movsi_xor"
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[(set (match_operand:SI 0 "register_operand" "=r")
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(match_operand:SI 1 "const0_operand" "i"))
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(clobber (reg:CC 17))]
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@ -13126,14 +13126,45 @@
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[(reg 17) (const_int 0)]))
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(set (match_operand 3 "q_regs_operand" "")
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(zero_extend (match_dup 1)))]
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"peep2_reg_dead_p (3, operands[1])
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"(peep2_reg_dead_p (3, operands[1])
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|| operands_match_p (operands[1], operands[3]))
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&& ! reg_overlap_mentioned_p (operands[3], operands[0])"
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[(set (match_dup 3) (const_int 0))
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(set (match_dup 4) (match_dup 0))
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[(set (match_dup 4) (match_dup 0))
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(set (strict_low_part (match_dup 5))
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(match_dup 2))]
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"operands[4] = gen_rtx_REG (GET_MODE (operands[0]), 17);
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operands[5] = gen_rtx_REG (QImode, REGNO (operands[3]));")
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{
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operands[4] = gen_rtx_REG (GET_MODE (operands[0]), 17);
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operands[5] = gen_rtx_REG (QImode, REGNO (operands[3]));
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if (HAVE_movsi_xor)
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emit_insn (gen_movsi_xor (operands[3], const0_rtx));
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else
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emit_insn (gen_movsi (operands[3], const0_rtx));
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})
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;; Similar, but match zero_extendhisi2_and, which adds a clobber.
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(define_peephole2
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[(set (reg 17) (match_operand 0 "" ""))
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(set (match_operand:QI 1 "register_operand" "")
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(match_operator:QI 2 "ix86_comparison_operator"
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[(reg 17) (const_int 0)]))
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(parallel [(set (match_operand 3 "q_regs_operand" "")
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(zero_extend (match_dup 1)))
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(clobber (reg:CC 17))])]
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"(peep2_reg_dead_p (3, operands[1])
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|| operands_match_p (operands[1], operands[3]))
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&& ! reg_overlap_mentioned_p (operands[3], operands[0])"
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[(set (match_dup 4) (match_dup 0))
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(set (strict_low_part (match_dup 5))
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(match_dup 2))]
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{
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operands[4] = gen_rtx_REG (GET_MODE (operands[0]), 17);
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operands[5] = gen_rtx_REG (QImode, REGNO (operands[3]));
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if (HAVE_movsi_xor)
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emit_insn (gen_movsi_xor (operands[3], const0_rtx));
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else
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emit_insn (gen_movsi (operands[3], const0_rtx));
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})
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;; Call instructions.
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