Register CALL_INSN_FUNCTION_USAGE in find_all_hard_reg_sets

2014-04-25  Tom de Vries  <tom@codesourcery.com>

	* rtlanal.c (find_all_hard_reg_sets): Note INSN_CALL_FUNCTION_USAGE
	clobbers.

From-SVN: r209799

gcc/ChangeLog

+2014-04-25  Tom de Vries  <tom@codesourcery.com>
+
+	* rtlanal.c (find_all_hard_reg_sets): Note INSN_CALL_FUNCTION_USAGE
+	clobbers.
+
 2014-04-25  Radovan Obradovic  <robradovic@mips.com>
             Tom de Vries  <tom@codesourcery.com>
 

gcc/rtlanal.c

@@ -1052,8 +1052,14 @@ find_all_hard_reg_sets (const_rtx insn, HARD_REG_SET *pset, bool implicit)
 
   CLEAR_HARD_REG_SET (*pset);
   note_stores (PATTERN (insn), record_hard_reg_sets, pset);
-  if (implicit && CALL_P (insn))
-    IOR_HARD_REG_SET (*pset, call_used_reg_set);
+  if (CALL_P (insn))
+    {
+      if (implicit)
+	IOR_HARD_REG_SET (*pset, call_used_reg_set);
+
+      for (link = CALL_INSN_FUNCTION_USAGE (insn); link; link = XEXP (link, 1))
+	record_hard_reg_sets (XEXP (link, 0), NULL, pset);
+    }
   for (link = REG_NOTES (insn); link; link = XEXP (link, 1))
     if (REG_NOTE_KIND (link) == REG_INC)
       record_hard_reg_sets (XEXP (link, 0), NULL, pset);