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| author | Christophe Lyon <christophe.lyon@linaro.org> | 2017-02-06 21:38:10 +0000 |
|---|---|---|
| committer | Yvan Roux <yvan.roux@linaro.org> | 2017-02-11 09:25:32 +0000 |
| commit | 25ff76c7b89746d5b2d5a01788a9d9dba61a984a (patch) | |
| tree | bf48497792868031ce7df131c969749589e2618c | |
| parent | 5c9160f44e50073bd9cd3d6b8770ff47b4a2dd22 (diff) | |
| download | gcc-25ff76c7b89746d5b2d5a01788a9d9dba61a984a.tar.gz | |
gcc/
Backport from trunk r230499.
2015-11-17 Bernd Schmidt <bschmidt@redhat.com>
PR target/66785
* regrename.c (record_operand_use): Keep track of failed operands
and stop appending if we see any.
* regrename.h (struct operand_rr_info): Add a failed field and shrink
n_chains to short.
Change-Id: I9dc44d22272863d5b3f491a87d169e5dc2eed7a2
| -rw-r--r-- | gcc/regrename.c | 7 | ||||
| -rw-r--r-- | gcc/regrename.h | 3 |
2 files changed, 8 insertions, 2 deletions
diff --git a/gcc/regrename.c b/gcc/regrename.c index 3d85b651583..2587143d233 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -215,8 +215,13 @@ mark_conflict (struct du_head *chains, unsigned id) static void record_operand_use (struct du_head *head, struct du_chain *this_du) { - if (cur_operand == NULL) + if (cur_operand == NULL || cur_operand->failed) return; + if (head->cannot_rename) + { + cur_operand->failed = true; + return; + } gcc_assert (cur_operand->n_chains < MAX_REGS_PER_ADDRESS); cur_operand->heads[cur_operand->n_chains] = head; cur_operand->chains[cur_operand->n_chains++] = this_du; diff --git a/gcc/regrename.h b/gcc/regrename.h index bbe156dbc4e..84112d63da4 100644 --- a/gcc/regrename.h +++ b/gcc/regrename.h @@ -68,7 +68,8 @@ struct du_chain struct operand_rr_info { /* The number of chains recorded for this operand. */ - int n_chains; + short n_chains; + bool failed; /* Holds either the chain for the operand itself, or for the registers in a memory operand. */ struct du_chain *chains[MAX_REGS_PER_ADDRESS]; |