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re PR target/66785 (internal compiler error in record_operand_use)

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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.

From-SVN: r230499
This commit is contained in:
Bernd Schmidt 2015-11-17 21:20:20 +00:00 • committed by Bernd Schmidt
parent 9f50f67c0b
commit d534bf561e
3 changed files with 16 additions and 2 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
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.
2015-11-17 Sandra Loosemore <sandra@codesourcery.com>
PR 48568

7
gcc/regrename.c
View file

@ -203,8 +203,13 @@ 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;

3
gcc/regrename.h
View file

@ -72,7 +72,8 @@ 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];