diff options
| author | krebbel <krebbel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-03-16 08:15:35 +0000 |
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| committer | krebbel <krebbel@138bc75d-0d04-0410-961f-82ee72b054a4> | 2006-03-16 08:15:35 +0000 |
| commit | dc44b957fb24d4e3581e40788fec69b5f4f4b9bc (patch) | |
| tree | bddd4255cea6140e8144f36f712a40029350ef81 /gcc/simplify-rtx.c | |
| parent | ea13ae4c1c4e5e44dbfc1a38703741dec4b15670 (diff) | |
| download | gcc-dc44b957fb24d4e3581e40788fec69b5f4f4b9bc.tar.gz | |
2006-03-16 Andreas Krebbel <krebbel1@de.ibm.com>
* simplify-rtx.c (simplify_plus_minus): Simplify within CONST terms.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@112131 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 754464d06f1..e00e9ccca10 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -3320,8 +3320,21 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0, else if (swap_commutative_operands_p (lhs, rhs)) tem = lhs, lhs = rhs, rhs = tem; - tem = simplify_binary_operation (ncode, mode, lhs, rhs); + if ((GET_CODE (lhs) == CONST || GET_CODE (lhs) == CONST_INT) + && (GET_CODE (rhs) == CONST || GET_CODE (rhs) == CONST_INT)) + { + rtx tem_lhs, tem_rhs; + + tem_lhs = GET_CODE (lhs) == CONST ? XEXP (lhs, 0) : lhs; + tem_rhs = GET_CODE (rhs) == CONST ? XEXP (rhs, 0) : rhs; + tem = simplify_binary_operation (ncode, mode, tem_lhs, tem_rhs); + if (tem && !CONSTANT_P (tem)) + tem = gen_rtx_CONST (GET_MODE (tem), tem); + } + else + tem = simplify_binary_operation (ncode, mode, lhs, rhs); + /* Reject "simplifications" that just wrap the two arguments in a CONST. Failure to do so can result in infinite recursion with simplify_binary_operation |