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[PATCH, SMS 2/3] Skip DEBUG_INSNs while recognizing doloop
- From: Revital Eres <revital dot eres at linaro dot org>
- To: zaks at il dot ibm dot com
- Cc: gcc-patches at gcc dot gnu dot org, Patch Tracking <patches at linaro dot org>
- Date: Sun, 8 May 2011 07:37:21 +0300
- 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.
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)
{