diff options
| author | Paolo Bonzini <bonzini@gnu.org> | 2008-05-08 16:40:17 +0000 |
|---|---|---|
| committer | David Edelsohn <edelsohn@gnu.org> | 2008-05-08 16:40:17 +0000 |
| commit | 7526ac6789c95bf38e805a352bb955d0f7c0e349 (patch) | |
| tree | ce808c504c7340f00f1cbfe2f28b5c1a47409f25 | |
| parent | 3843245dd193e909ecd2edc71a19b02577251a41 (diff) | |
2008-05-08 Paolo Bonzini <bonzini@gnu.org>
PR target/36090
* simplify-rtx.c (simplify_plus_minus): Create CONST of
similar RTX_CONST_OBJ before CONST_INT.
git-svn-id: https://gcc.gnu.org/svn/gcc/branches/gcc-4_3-branch@135087 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 21 |
2 files changed, 26 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 8f04550a5bb..d747e8b4c58 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-05-08 Paolo Bonzini <bonzini@gnu.org> + + PR target/36090 + * simplify-rtx.c (simplify_plus_minus): Create CONST of + similar RTX_CONST_OBJ before CONST_INT. + 2008-05-08 Richard Guenther <rguenther@suse.de> PR middle-end/36154 diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index f8756040ce0..7b5f2d05285 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -3659,7 +3659,26 @@ simplify_plus_minus (enum rtx_code code, enum machine_mode mode, rtx op0, combination loop to avoid recursion. Create one manually now. The combination loop should have ensured that there is exactly one CONST_INT, and the sort will have ensured that it is last - in the array and that any other constant will be next-to-last. */ + in the array and that any other constant will be next-to-last. + Group similar RTX_CONST_OBJ first, then CONST_INT. */ + + if (GET_CODE (ops[n_ops - 1].op) == CONST_INT) + i = n_ops - 2; + else + i = n_ops - 1; + + if (i >= 1 + && ops[i].neg + && !ops[i - 1].neg + && CONSTANT_P (ops[i].op) + && GET_CODE (ops[i].op) == GET_CODE (ops[i - 1].op)) + { + ops[i - 1].op = gen_rtx_MINUS (mode, ops[i - 1].op, ops[i].op); + ops[i - 1].op = gen_rtx_CONST (mode, ops[i - 1].op); + if (i < n_ops - 1) + ops[i] = ops[i + 1]; + n_ops--; + } if (n_ops > 1 && GET_CODE (ops[n_ops - 1].op) == CONST_INT |