From caa05ce2013e867928534e2b4cf146d7e35bbeaf Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Tue, 13 Sep 2016 09:47:10 +0000 Subject: [PATCH] * optabs.c (prepare_cmp_insn): Update documentation comment. From-SVN: r240108 --- gcc/ChangeLog | 4 ++++ gcc/optabs.c | 12 ++++++++---- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ad74cc17bfb..a11a273ea8b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2016-09-13 Maciej W. Rozycki + + * optabs.c (prepare_cmp_insn): Update documentation comment. + 2016-09-13 Jakub Jelinek Manuel Lopez-Ibanez diff --git a/gcc/optabs.c b/gcc/optabs.c index 87b4f978420..e41747a630f 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 -- 2.30.2