Patchwork [SMS,2/3] Skip DEBUG_INSNs while recognizing doloop

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Submitter Ayal Zaks
Date May 10, 2011, 10:50 p.m.
Message ID <OFF35020B6.03E51811-ONC225788C.007D511F-C225788C.007D7DA9@il.ibm.com>
Download mbox | patch
Permalink /patch/95103/
State New
Headers show

Comments

Ayal Zaks - May 10, 2011, 10:50 p.m.
> OK for mainline?

Yes, this is pretty obvious. (You don't have to change to
prev_nondebug_insn btw).

Ayal.




From:	Revital Eres <revital.eres@linaro.org>
To:	Ayal Zaks/Haifa/IBM@IBMIL
Cc:	gcc-patches@gcc.gnu.org, Patch Tracking <patches@linaro.org>
Date:	08/05/2011 07:37 AM
Subject:	[PATCH, SMS 2/3] Skip DEBUG_INSNs while recognizing doloop



Hello,

The attached patch adds code to skip DEBUG_INSNs while recognizing
doloop pattern.

The patch was tested together with the rest of the patches in this series
and on top of the patch to support do-loop for ARM (not yet in mainline,
but approved http://gcc.gnu.org/ml/gcc-patches/2011-01/msg01718.html).
On ppc64-redhat-linux regtest as well as bootstrap with SMS flags
enabling SMS also on loops with stage count 1.  Regtested on SPU.
On arm-linux-gnueabi regtseted on c,c++. Bootstrap c language with SMS
flags enabling SMS also on loops with stage count 1.

OK for mainline?

Thanks,
Revital

Changelog:

        * modulo-sched.c (doloop_register_get): Ignore DEBUG_INSNs while
        recognizing doloop.


         {

Patch

Index: modulo-sched.c
===================================================================
--- modulo-sched.c      (revision 173368)
+++ modulo-sched.c      (working copy)
@@ -310,10 +313,10 @@  doloop_register_get (rtx head ATTRIBUTE_
      either a single (parallel) branch-on-count or a (non-parallel)
      branch immediately preceded by a single (decrement) insn.  */
   first_insn_not_to_check = (GET_CODE (PATTERN (tail)) == PARALLEL ? tail
-                             : PREV_INSN (tail));
+                             : prev_nondebug_insn (tail));

   for (insn = head; insn != first_insn_not_to_check; insn = NEXT_INSN
(insn))
-    if (reg_mentioned_p (reg, insn))
+    if (reg_mentioned_p (reg, insn) && !DEBUG_INSN_P (insn))
       {
         if (dump_file)