re PR rtl-optimization/7335 (Sparc: ICE in verify_wide_reg (flow.c:557) with…

re PR rtl-optimization/7335 (Sparc: ICE in verify_wide_reg (flow.c:557) with long double and optimization)

2002-09-26  David S. Miller  <davem@redhat.com>

	PR optimization/7335
	* calls.c (emit_library_call_value_1): Passing args by reference
	converts a CONST function into a PURE one.

From-SVN: r57576

gcc/ChangeLog

+2002-09-26  David S. Miller  <davem@redhat.com>
+
+	PR optimization/7335
+	* calls.c (emit_library_call_value_1): Passing args by reference
+	converts a CONST function into a PURE one.
+
 2002-09-26  David Edelsohn  <edelsohn@gnu.org>
 
 	* dbxout.c (FORCE_TEXT): Switch to current_function_decl, not

gcc/calls.c

@@ -3684,6 +3684,14 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
 	    }
 	  flags &= ~(ECF_CONST | ECF_PURE | ECF_LIBCALL_BLOCK);
 
+	  /* If this was a CONST function, it is now PURE since
+	     it now reads memory.  */
+	  if (flags & ECF_CONST)
+	    {
+	      flags &= ~ECF_CONST;
+	      flags |= ECF_PURE;
+	    }
+
 	  if (GET_MODE (val) == MEM && ! must_copy)
 	    slot = val;
 	  else if (must_copy)