diff options
Diffstat (limited to 'gcc/loop-doloop.c')
| -rw-r--r-- | gcc/loop-doloop.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/gcc/loop-doloop.c b/gcc/loop-doloop.c index dd15aab919f..c40777b82c4 100644 --- a/gcc/loop-doloop.c +++ b/gcc/loop-doloop.c @@ -203,12 +203,16 @@ doloop_valid_p (struct loop *loop, struct niter_desc *desc) { /* Different targets have different necessities for low-overhead looping. Call the back end for each instruction within the loop - to let it decide whether the insn is valid. */ - if (!targetm.insn_valid_within_doloop (insn)) - { + to let it decide whether the insn prohibits a low-overhead loop. + It will then return the cause for it to emit to the dump file. */ + const char * invalid = targetm.invalid_within_doloop (insn); + if (invalid) + { + if (dump_file) + fprintf (dump_file, "Doloop: %s\n", invalid); result = false; goto cleanup; - } + } } } result = true; |