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sh.c (expand_cbranchdi4): Use a scratch register for the none zero constant operand except for EQ and NE...

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* config/sh/sh.c (expand_cbranchdi4): Use a scratch register
	for the none zero constant operand except for EQ and NE
	comprisons even when the first operand is R0.

From-SVN: r147661
This commit is contained in:
Kaz Kojima 2009-05-18 12:53:22 +00:00
parent f4aa38482c
commit 9905269286
2 changed files with 14 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2009-05-18 Kaz Kojima <kkojima@gcc.gnu.org>
* config/sh/sh.c (expand_cbranchdi4): Use a scratch register
for the none zero constant operand except for EQ and NE
comprisons even when the first operand is R0.
2009-05-18 Andreas Krebbel <krebbel1@de.ibm.com>
* config/s390/2064.md: Remove trailing whitespaces.

11
gcc/config/sh/sh.c
View File

@ -1632,7 +1632,8 @@ expand_cbranchdi4 (rtx *operands, enum rtx_code comparison)
operands[2] = op2h;
operands[4] = NULL_RTX;
if (reload_completed
&& ! arith_reg_or_0_operand (op2h, SImode) && true_regnum (op1h)
&& ! arith_reg_or_0_operand (op2h, SImode)
&& (true_regnum (op1h) || (comparison != EQ && comparison != NE))
&& (msw_taken != LAST_AND_UNUSED_RTX_CODE
|| msw_skip != LAST_AND_UNUSED_RTX_CODE))
{
@ -1662,8 +1663,12 @@ expand_cbranchdi4 (rtx *operands, enum rtx_code comparison)
if (lsw_taken != LAST_AND_UNUSED_RTX_CODE)
{
if (reload_completed
&& ! arith_reg_or_0_operand (op2l, SImode) && true_regnum (op1l))
operands[4] = scratch;
&& ! arith_reg_or_0_operand (op2l, SImode)
&& (true_regnum (op1l) || (lsw_taken != EQ && lsw_taken != NE)))
{
emit_move_insn (scratch, operands[2]);
operands[2] = scratch;
}
expand_cbranchsi4 (operands, lsw_taken, lsw_taken_prob);
}
if (msw_skip != LAST_AND_UNUSED_RTX_CODE)