PR debug/43508

[pf3gnuchains/gcc-fork.git] / gcc / caller-save.c

diff --git a/gcc/caller-save.c b/gcc/caller-save.c
index dbfd42a..6bcfd4b 100644 (file)
--- a/gcc/caller-save.c
+++ b/gcc/caller-save.c
@@ -30,6 +30,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "hard-reg-set.h"
 #include "recog.h"
 #include "basic-block.h"
+#include "df.h"
 #include "reload.h"
 #include "function.h"
 #include "expr.h"
@@ -37,9 +38,11 @@ along with GCC; see the file COPYING3.  If not see
 #include "tm_p.h"
 #include "addresses.h"
 #include "output.h"
-#include "df.h"
 #include "ggc.h"
 
+/* True if caller-save has been initialized.  */
+bool caller_save_initialized_p;
+
 /* Call used hard registers which can not be saved because there is no
    insn for this.  */
 HARD_REG_SET no_caller_save_reg_set;
@@ -208,6 +211,11 @@ init_caller_save (void)
   rtx address;
   int i, j;
 
+  if (caller_save_initialized_p)
+    return;
+
+  caller_save_initialized_p = true;
+
   CLEAR_HARD_REG_SET (no_caller_save_reg_set);
   /* First find all the registers that we need to deal with and all
      the modes that they can have.  If we can't find a mode to use,