Define GC_save_regs_ret_val variable only if used (IA64)

(refactoring)

* mach_dep.c [IA64] (GC_save_regs_ret_val): Do not define variable
if SPARC or THREADS.
* mach_dep.c [IA64 || SPARC] (GC_with_callee_saves_pushed): Do not
store result of GC_save_regs_in_stack() to GC_save_regs_ret_val if
SPARC or THREADS.

1 files changed, 3 insertions, 4 deletions

diff --git a/mach_dep.c b/mach_dep.c
index e6815919..c3e17e27 100644
--- a/mach_dep.c
+++ b/mach_dep.c
@@ -190,9 +190,8 @@
 
 #endif /* MACOS && __MWERKS__ */
 
-# if defined(SPARC) || defined(IA64)
-    /* Value returned from register flushing routine; either sp (SPARC) */
-    /* or ar.bsp (IA64).                                                */
+# if defined(IA64) && !defined(THREADS)
+    /* Value returned from register flushing routine (ar.bsp).  */
     GC_INNER ptr_t GC_save_regs_ret_val = NULL;
 # endif
 
@@ -388,7 +387,7 @@ GC_INNER void GC_with_callee_saves_pushed(void (*fn)(ptr_t, void *),
         /* On a register window machine, we need to save register       */
         /* contents on the stack for this to work.  This may already be */
         /* subsumed by the getcontext() call.                           */
-#       if defined(IA64) || defined(SPARC)
+#       if defined(IA64) && !defined(THREADS)
           GC_save_regs_ret_val =
 #       endif
             GC_save_regs_in_stack();