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| author | Richard Kenner <kenner@gcc.gnu.org> | 1997-04-13 09:48:25 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1997-04-13 09:48:25 -0400 |
| commit | 06140bdfa1c2a5aabd241d03e9d1bb62ad89c9c3 (patch) | |
| tree | 3b490103ae8d62f6518c1facd6b32d193ba20482 /gcc/recog.c | |
| parent | eead6b5bdaa008eed61307e1fe90b6d4c2e24dd1 (diff) | |
| download | gcc-06140bdfa1c2a5aabd241d03e9d1bb62ad89c9c3.zip gcc-06140bdfa1c2a5aabd241d03e9d1bb62ad89c9c3.tar.gz gcc-06140bdfa1c2a5aabd241d03e9d1bb62ad89c9c3.tar.bz2 | |
(validate_replace_rtx_1, case MINUS): New case.
From-SVN: r13869
Diffstat (limited to 'gcc/recog.c')
| -rw-r--r-- | gcc/recog.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/gcc/recog.c b/gcc/recog.c index 3c7d14c..92fc6d8 100644 --- a/gcc/recog.c +++ b/gcc/recog.c @@ -1,5 +1,5 @@ /* Subroutines used by or related to instruction recognition. - Copyright (C) 1987, 88, 91-5, 1996 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1991-6, 1997 Free Software Foundation, Inc. This file is part of GNU CC. @@ -374,15 +374,28 @@ validate_replace_rtx_1 (loc, from, to, object) } } + /* Note that if CODE's RTX_CLASS is "c" or "<" we will have already + done the substitution, otherwise we won't. */ + switch (code) { case PLUS: /* If we have have a PLUS whose second operand is now a CONST_INT, use plus_constant to try to simplify it. */ if (GET_CODE (XEXP (x, 1)) == CONST_INT && XEXP (x, 1) == to) - validate_change (object, loc, - plus_constant (XEXP (x, 0), INTVAL (XEXP (x, 1))), 1); + validate_change (object, loc, plus_constant (XEXP (x, 0), INTVAL (to)), + 1); return; + + case MINUS: + if (GET_CODE (to) == CONST_INT && XEXP (x, 1) == from) + { + validate_change (object, loc, + plus_constant (XEXP (x, 0), - INTVAL (to)), + 1); + return; + } + break; case ZERO_EXTEND: case SIGN_EXTEND: |