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| author | Joseph Myers <joseph@codesourcery.com> | 2005-11-19 12:32:23 +0000 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2005-11-19 12:32:23 +0000 |
| commit | 756191b7c51263603b91b45f60d5d6acf7250711 (patch) | |
| tree | 12bfadc14e1e9523af41c36f9907180bc2985ab0 /gcc | |
| parent | 0ed9a3e3143e00af1ed3f1793dd10cd8d6507de4 (diff) | |
| download | gcc-756191b7c51263603b91b45f60d5d6acf7250711.zip gcc-756191b7c51263603b91b45f60d5d6acf7250711.tar.gz gcc-756191b7c51263603b91b45f60d5d6acf7250711.tar.bz2 | |
combine.c (make_compound_operation): Swap operands of commutative operation if necessary before returning.
* combine.c (make_compound_operation): Swap operands of
commutative operation if necessary before returning.
From-SVN: r107219
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 10 |
2 files changed, 15 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1200433..21b5585 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-11-19 Joseph S. Myers <joseph@codesourcery.com> + + * combine.c (make_compound_operation): Swap operands of + commutative operation if necessary before returning. + 2005-11-19 Richard Guenther <rguenther@suse.de> PR middle-end/23294 diff --git a/gcc/combine.c b/gcc/combine.c index 9f910a7..b43b9b6 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6914,6 +6914,16 @@ make_compound_operation (rtx x, enum rtx_code in_code) SUBST (XEXP (x, i), new); } + /* If this is a commutative operation, the changes to the operands + may have made it noncanonical. */ + if (COMMUTATIVE_ARITH_P (x) + && swap_commutative_operands_p (XEXP (x, 0), XEXP (x, 1))) + { + tem = XEXP (x, 0); + SUBST (XEXP (x, 0), XEXP (x, 1)); + SUBST (XEXP (x, 1), tem); + } + return x; } |