Don't split call from its call arg location.

gcc/
2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>

	* cfgrtl.c (force_nonfallthru_and_redirect): Don't split a call
	and its corresponding call arg location note.

testsuite/
2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>

	* gcc.target/arc/loop-5.cpp: New test.

From-SVN: r254998

gcc/ChangeLog

 2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* cfgrtl.c (force_nonfallthru_and_redirect): Don't split a call
+	and its corresponding call arg location note.
+
+2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>
 	    Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* config/arc/arc-protos.h (arc_compute_frame_size): Delete

gcc/cfgrtl.c

@@ -1626,6 +1626,11 @@ force_nonfallthru_and_redirect (edge e, basic_block target, rtx jump_label)
       else
 	new_head = BB_END (e->src);
       new_head = NEXT_INSN (new_head);
+      /* Make sure we don't split a call and its corresponding
+	 CALL_ARG_LOCATION note.  */
+      if (new_head && NOTE_P (new_head)
+	  && NOTE_KIND (new_head) == NOTE_INSN_CALL_ARG_LOCATION)
+	new_head = NEXT_INSN (new_head);
 
       jump_block = create_basic_block (new_head, NULL, e->src);
       jump_block->count = count;

gcc/testsuite/ChangeLog

+2017-11-21  Claudiu Zissulescu  <claziss@synopsys.com>
+
+	* gcc.target/arc/loop-5.cpp: New test.
+
 2017-11-21  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/83047

gcc/testsuite/gcc.target/arc/loop-5.cpp

+/* { dg-do compile } */
+/* { dg-options "-O2 -g" } */
+
+/* Check if gcc splits a call from its CALL_ARG_LOCATION note.  If so,
+   we get an ICE in dwarf2out_var_location.  */
+
+typedef void Trans_NS_std_new_handler();
+void *operator new(unsigned)
+{
+  void *p;
+  while (__builtin_expect(p == 0, false))
+    {
+      Trans_NS_std_new_handler handler;
+      try {
+	handler();
+      } catch (int) {
+      }
+    }
+  return (void*) 0xdead;
+}