msp430.c (msp430_attr): Produce an error if a static interrupt handler is detected.

	* config/msp430/msp430.c (msp430_attr): Produce an error if a
	static interrupt handler is detected.
	* config/msp430/msp430.h (LIB_SPEC): Do not use msp430.ld as the
	default linker script.
	* config/msp430/msp430.md (movpsihi2_lo): New pattern for loading
	the low part of a symbolic pointer.

From-SVN: r236704

gcc/ChangeLog

+2016-05-25  Nick Clifton  <nickc@redhat.com>
+
+	* config/msp430/msp430.c (msp430_attr): Produce an error if a
+	static interrupt handler is detected.
+	* config/msp430/msp430.h (LIB_SPEC): Do not use msp430.ld as the
+	default linker script.
+	* config/msp430/msp430.md (movpsihi2_lo): New pattern for loading
+	the low part of a symbolic pointer.
+
 2016-05-25  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/71261

gcc/config/msp430/msp430.c

@@ -1832,6 +1832,7 @@ msp430_attr (tree * node,
 
   if (args != NULL)
     {
+      /* Only the interrupt attribute takes an argument.  */
       gcc_assert (TREE_NAME_EQ (name, ATTR_INTR));
 
       tree value = TREE_VALUE (args);
@@ -1878,6 +1879,9 @@ msp430_attr (tree * node,
       if (TREE_CODE (TREE_TYPE (* node)) == FUNCTION_TYPE
 	  && ! VOID_TYPE_P (TREE_TYPE (TREE_TYPE (* node))))
 	message = "interrupt handlers must be void";
+
+      if (! TREE_PUBLIC (* node))
+	message = "interrupt handlers cannot be static";
     }
   else if (TREE_NAME_EQ (name, ATTR_REENT))
     {

gcc/config/msp430/msp430.h

@@ -98,7 +98,6 @@ extern const char * msp430_select_hwmult_lib (int, const char **);
 %{!msim:-lnosys}					\
 --end-group					   	\
 %{!T*:%{!msim:%{mmcu=*:--script=%*.ld}}}		\
-%{!T*:%{!msim:%{!mmcu=*:%Tmsp430.ld}}}			\
 %{!T*:%{msim:%{mlarge:%Tmsp430xl-sim.ld}%{!mlarge:%Tmsp430-sim.ld}}} \
 "
 

gcc/config/msp430/msp430.md

@@ -267,6 +267,14 @@
   "PUSH.W\t%H1 { PUSH.W\t%L1 { POPM.A #1, %0 ; Move reg-pair %L1:%H1 into pointer %0"
 )
 
+;; Produced when converting a pointer to an integer via a union, eg gcc.dg/pr47201.c.
+(define_insn "*movpsihi2_lo"
+  [(set (match_operand:HI             0 "register_operand" "=r")
+	(subreg:HI (match_operand:PSI 1 "msp430_symbol_operand" "i") 0))]
+  "msp430x"
+  "MOVA\t%1, %0"
+)
+
 ;;------------------------------------------------------------
 ;; Math