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| author | Maciej W. Rozycki <macro@imgtec.com> | 2016-09-13 09:47:10 +0000 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@gcc.gnu.org> | 2016-09-13 09:47:10 +0000 |
| commit | caa05ce2013e867928534e2b4cf146d7e35bbeaf (patch) | |
| tree | c54c4d7c956c31d24da020d24ef59a0a45db3b0a | |
| parent | 14bce2578e2916b66d7ae7a42a83c510d8d7f804 (diff) | |
| download | gcc-caa05ce2013e867928534e2b4cf146d7e35bbeaf.zip gcc-caa05ce2013e867928534e2b4cf146d7e35bbeaf.tar.gz gcc-caa05ce2013e867928534e2b4cf146d7e35bbeaf.tar.bz2 | |
* optabs.c (prepare_cmp_insn): Update documentation comment.
From-SVN: r240108
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/optabs.c | 12 |
2 files changed, 12 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ad74cc1..a11a273 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2016-09-13 Maciej W. Rozycki <macro@imgtec.com> + + * optabs.c (prepare_cmp_insn): Update documentation comment. + 2016-09-13 Jakub Jelinek <jakub@redhat.com> Manuel Lopez-Ibanez <manu@gcc.gnu.org> diff --git a/gcc/optabs.c b/gcc/optabs.c index 87b4f97..e41747a 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -3716,13 +3716,17 @@ can_compare_p (enum rtx_code code, machine_mode mode, } /* This function is called when we are going to emit a compare instruction that - compares the values found in *PX and *PY, using the rtl operator COMPARISON. + compares the values found in X and Y, using the rtl operator COMPARISON. - *PMODE is the mode of the inputs (in case they are const_int). - *PUNSIGNEDP nonzero says that the operands are unsigned; + If they have mode BLKmode, then SIZE specifies the size of both operands. + + UNSIGNEDP nonzero says that the operands are unsigned; this matters if they need to be widened (as given by METHODS). - If they have mode BLKmode, then SIZE specifies the size of both operands. + *PTEST is where the resulting comparison RTX is returned or NULL_RTX + if we failed to produce one. + + *PMODE is the mode of the inputs (in case they are const_int). This function performs all the setup necessary so that the caller only has to emit a single comparison insn. This setup can involve doing a BLKmode |