Patchwork Commit: V850: Fix generation of callt helper functions for interrupt handlers

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Submitter Nick Clifton
Date April 12, 2011, 11:33 a.m.
Message ID <m362qjr9ff.fsf@redhat.com>
Download mbox | patch
Permalink /patch/90767/
State New
Headers show

Comments

Nick Clifton - April 12, 2011, 11:33 a.m.
Hi Guys,

  I am applying the patch below to the 4.6 branch and mainline sources.
  It fixes a problem with the V850 backend where it would generate a
  CALLT instruction for a V850 variant which does not support it, when
  gcc was compiling an interrupt handler.

Cheers
  Nick

gcc/ChangeLog
2011-04-12  Nick Clifton  <nickc@redhat.com>

	* config/v850/v850.c (expand_prologue): Do not use the CALLT
	instruction for interrupt handlers if the target is the basic V850
	architecture.
	(expand_epilogue): Likewise.

Patch

Index: gcc/config/v850/v850.c
===================================================================
--- gcc/config/v850/v850.c	(revision 172300)
+++ gcc/config/v850/v850.c	(working copy)
@@ -1686,7 +1686,7 @@ 
   /* Save/setup global registers for interrupt functions right now.  */
   if (interrupt_handler)
     {
-      if (! TARGET_DISABLE_CALLT)
+      if (! TARGET_DISABLE_CALLT && (TARGET_V850E || TARGET_V850E2_ALL))
 	emit_insn (gen_callt_save_interrupt ());
       else
 	emit_insn (gen_save_interrupt ());
@@ -1768,7 +1768,7 @@ 
       /* Special case interrupt functions that save all registers for a call.  */
       if (interrupt_handler && ((1L << LINK_POINTER_REGNUM) & reg_saved) != 0)
 	{
-	  if (! TARGET_DISABLE_CALLT)
+	  if (! TARGET_DISABLE_CALLT && (TARGET_V850E || TARGET_V850E2_ALL))
 	    emit_insn (gen_callt_save_all_interrupt ());
 	  else
 	    emit_insn (gen_save_all_interrupt ());
@@ -2019,7 +2019,7 @@ 
       /* And return or use reti for interrupt handlers.  */
       if (interrupt_handler)
         {
-          if (! TARGET_DISABLE_CALLT)
+          if (! TARGET_DISABLE_CALLT && (TARGET_V850E || TARGET_V850E2_ALL))
             emit_insn (gen_callt_return_interrupt ());
           else
             emit_jump_insn (gen_return_interrupt ());