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m32c.c (m32c_prepare_shift): Use a separate temporary for intermediates.

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* config/m32c/m32c.c (m32c_prepare_shift): Use a separate
temporary for intermediates.

From-SVN: r118798
This commit is contained in:
DJ Delorie 2006-11-13 21:29:46 -05:00 • committed by DJ Delorie
parent 8b3c6c5a91
commit 833bf445b0
2 changed files with 12 additions and 5 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2006-11-13 DJ Delorie <dj@redhat.com>
* config/m32c/m32c.c (m32c_prepare_shift): Use a separate
temporary for intermediates.
2006-11-13 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/sh.c (expand_cbranchdi4): Initialize skip_label.

12
gcc/config/m32c/m32c.c
View file

@ -3423,7 +3423,7 @@ m32c_prepare_shift (rtx * operands, int scale, int shift_code)
undefined to skip one of the comparisons. */
rtx count;
rtx label, lref, insn;
rtx label, lref, insn, tempvar;
emit_move_insn (operands[0], operands[1]);
@ -3432,13 +3432,15 @@ m32c_prepare_shift (rtx * operands, int scale, int shift_code)
lref = gen_rtx_LABEL_REF (VOIDmode, label);
LABEL_NUSES (label) ++;
tempvar = gen_reg_rtx (mode);
if (shift_code == ASHIFT)
{
/* This is a left shift. We only need check positive counts. */
emit_jump_insn (gen_cbranchqi4 (gen_rtx_LE (VOIDmode, 0, 0),
count, GEN_INT (16), label));
emit_insn (func (operands[0], operands[0], GEN_INT (8)));
emit_insn (func (operands[0], operands[0], GEN_INT (8)));
emit_insn (func (tempvar, operands[0], GEN_INT (8)));
emit_insn (func (operands[0], tempvar, GEN_INT (8)));
insn = emit_insn (gen_addqi3 (count, count, GEN_INT (-16)));
emit_label_after (label, insn);
}
@ -3447,8 +3449,8 @@ m32c_prepare_shift (rtx * operands, int scale, int shift_code)
/* This is a right shift. We only need check negative counts. */
emit_jump_insn (gen_cbranchqi4 (gen_rtx_GE (VOIDmode, 0, 0),
count, GEN_INT (-16), label));
emit_insn (func (operands[0], operands[0], GEN_INT (-8)));
emit_insn (func (operands[0], operands[0], GEN_INT (-8)));
emit_insn (func (tempvar, operands[0], GEN_INT (-8)));
emit_insn (func (operands[0], tempvar, GEN_INT (-8)));
insn = emit_insn (gen_addqi3 (count, count, GEN_INT (16)));
emit_label_after (label, insn);
}