xtensa: Fix PR target/78603

2016-11-29  Max Filippov  <jcmvbkbc@gmail.com>
gcc/
	* config/xtensa/xtensa.c (hwloop_optimize): Don't emit zero
	overhead loop start between a call and its CALL_ARG_LOCATION
	note.

From-SVN: r242979

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7ec2c074cc6264b993d1d05cf64f53bba5489138..fb3b4136dad630b7760e226bacd7119ac04b0979 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2016-11-29  Max Filippov  <jcmvbkbc@gmail.com>
+
+       PR target/78603
+       * config/xtensa/xtensa.c (hwloop_optimize): Don't emit zero
+       overhead loop start between a call and its CALL_ARG_LOCATION
+       note.
+
 2016-11-29  Waldemar Brodkorb  <wbx@openadk.org>
 
        * config/bfin/linux.h (CPP_SPEC): Define.

diff --git a/gcc/config/xtensa/xtensa.c b/gcc/config/xtensa/xtensa.c
index 6e8a25d0307d5aeacf07148c534727f1c24aa7f5..25ed7db4cd88840ae5cedf9d9f2b2655503c3c78 100644 (file)
--- a/gcc/config/xtensa/xtensa.c
+++ b/gcc/config/xtensa/xtensa.c
@@ -4167,7 +4167,10 @@ hwloop_optimize (hwloop_info loop)
       entry_after = BB_END (entry_bb);
       while (DEBUG_INSN_P (entry_after)
              || (NOTE_P (entry_after)
-                 && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK))
+                 && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK
+                /* Make sure we don't split a call and its corresponding
+                   CALL_ARG_LOCATION note.  */
+                 && NOTE_KIND (entry_after) != NOTE_INSN_CALL_ARG_LOCATION))
         entry_after = PREV_INSN (entry_after);
 
       emit_insn_after (seq, entry_after);