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| author | Richard Kenner <kenner@gcc.gnu.org> | 1993-09-19 12:48:55 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1993-09-19 12:48:55 -0400 |
| commit | e64c4f9e2e81206c40dab6de2054cfb265db1ac2 (patch) | |
| tree | e4d4f4a8b552b87020cbc174b5c2d8d496129852 | |
| parent | 2661cdd98dd00d1b820b00db6d6394e57b59ab24 (diff) | |
| download | gcc-e64c4f9e2e81206c40dab6de2054cfb265db1ac2.zip gcc-e64c4f9e2e81206c40dab6de2054cfb265db1ac2.tar.gz gcc-e64c4f9e2e81206c40dab6de2054cfb265db1ac2.tar.bz2 | |
(find_reloads): Reject an alternative if two operands match the same
output and we have to do a reload.
From-SVN: r5363
| -rw-r--r-- | gcc/reload.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index a0199e8..27d017d 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -2730,6 +2730,17 @@ find_reloads (insn, replace, ind_levels, live_known, reload_reg_p) we are supposed to match can be fixed with reloads. */ badop = 0; this_alternative[i] = this_alternative[c]; + + /* If we have to reload this operand and some previous + operand also had to match the same thing as this + operand, we don't know how to do that. So reject this + alternative. */ + if (! win || force_reload) + for (j = 0; j < i; j++) + if (this_alternative_matches[j] + == this_alternative_matches[i]) + badop = 1; + break; case 'p': |