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| author | Kaz Kojima <kkojima@gcc.gnu.org> | 2009-05-18 12:53:22 +0000 |
|---|---|---|
| committer | Kaz Kojima <kkojima@gcc.gnu.org> | 2009-05-18 12:53:22 +0000 |
| commit | 99052692869f6b6b69812de102b2c7f6e105ed38 (patch) | |
| tree | aba1a238f5d6edfe3bc0b8afee3403a4cc17a199 | |
| parent | f4aa38482cd7374e7fd6e0ff968f6c84e0823a0a (diff) | |
| download | gcc-99052692869f6b6b69812de102b2c7f6e105ed38.zip gcc-99052692869f6b6b69812de102b2c7f6e105ed38.tar.gz gcc-99052692869f6b6b69812de102b2c7f6e105ed38.tar.bz2 | |
sh.c (expand_cbranchdi4): Use a scratch register for the none zero constant operand except for EQ and NE...
* 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
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/sh/sh.c | 11 |
2 files changed, 14 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b769bcc..575773f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c index 79343bf..363934d 100644 --- a/gcc/config/sh/sh.c +++ b/gcc/config/sh/sh.c @@ -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) |