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pdp11.md (lshrsi3, lshrhi3): Use add for decrement. 

* config/pdp11/pdp11.md (lshrsi3, lshrhi3): Use add for
decrement.

From-SVN: r166493
This commit is contained in:
Paul Koning 2010-11-09 10:16:54 -05:00 committed by Paul Koning
parent 5923c6c37f
commit b99fd9f435
2 changed files with 7 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2010-11-09 Paul Koning <ni1d@arrl.net>
* config/pdp11/pdp11.md (lshrsi3, lshrhi3): Use add for
decrement.
2010-11-09 Richard Guenther <rguenther@suse.de>
PR tree-optimization/46177

4
gcc/config/pdp11/pdp11.md
View File

@ -897,7 +897,7 @@
if (GET_CODE (operands[2]) != CONST_INT)
{
r = gen_reg_rtx (HImode);
emit_insn (gen_subhi3 (r, operands [2], GEN_INT (1)));
emit_insn (gen_addhi3 (r, operands [2], GEN_INT (-1)));
emit_insn (gen_ashrsi3 (operands[0], operands[0], r));
}
else if ((unsigned) INTVAL (operands[2]) != 1)
@ -1043,7 +1043,7 @@
if (GET_CODE (operands[2]) != CONST_INT)
{
r = gen_reg_rtx (HImode);
emit_insn (gen_subhi3 (r, operands [2], GEN_INT (1)));
emit_insn (gen_addhi3 (r, operands [2], GEN_INT (-1)));
emit_insn (gen_ashrhi3 (operands[0], operands[0], r));
}
else if ((unsigned) INTVAL (operands[2]) != 1)