sh.c (unspec_caller_rtx_p): New.

        * config/sh/sh.c (unspec_caller_rtx_p): New.
	(sh_cannot_copy_insn_p): New.
        (TARGET_CANNOT_COPY_INSN_P): New.

From-SVN: r63084

2 files changed, 63 insertions, 0 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 04b7f81..07ba997 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2003-02-18  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+        * config/sh/sh.c (unspec_caller_rtx_p): New.
+	(sh_cannot_copy_insn_p): New.
+        (TARGET_CANNOT_COPY_INSN_P): New.
+
 2003-02-18  Richard Henderson  <rth@redhat.com>
 
 	* c-common.c (handle_used_attribute): Accept static data too.
diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c
index 0bb0d94..b6af3de 100644
--- a/gcc/config/sh/sh.c
+++ b/gcc/config/sh/sh.c
@@ -218,6 +218,8 @@ static int shiftcosts PARAMS ((rtx));
 static int andcosts PARAMS ((rtx));
 static int addsubcosts PARAMS ((rtx));
 static int multcosts PARAMS ((rtx));
+static bool unspec_caller_rtx_p PARAMS ((rtx));
+static bool sh_cannot_copy_insn_p PARAMS ((rtx));
 static bool sh_rtx_costs PARAMS ((rtx, int, int, int *));
 static int sh_address_cost PARAMS ((rtx));
 
@@ -271,6 +273,8 @@ static int sh_address_cost PARAMS ((rtx));
 #undef TARGET_FUNCTION_OK_FOR_SIBCALL
 #define TARGET_FUNCTION_OK_FOR_SIBCALL sh_function_ok_for_sibcall
 
+#undef TARGET_CANNOT_COPY_INSN_P
+#define TARGET_CANNOT_COPY_INSN_P sh_cannot_copy_insn_p
 #undef TARGET_RTX_COSTS
 #define TARGET_RTX_COSTS sh_rtx_costs
 #undef TARGET_ADDRESS_COST
@@ -1215,6 +1219,59 @@ output_file_start (file)
 	     TARGET_SHMEDIA64 ? 64 : 32);
 }
 
+/* Check if PAT includes UNSPEC_CALLER unspec pattern.  */
+
+static bool
+unspec_caller_rtx_p (pat)
+     rtx pat;
+{
+  switch (GET_CODE (pat))
+    {
+    case CONST:
+      return unspec_caller_rtx_p (XEXP (pat, 0));
+    case PLUS:
+    case MINUS:
+      if (unspec_caller_rtx_p (XEXP (pat, 0)))
+	return true;
+      return unspec_caller_rtx_p (XEXP (pat, 1));
+    case UNSPEC:
+      if (XINT (pat, 1) == UNSPEC_CALLER)
+	return true;
+    default:
+      break;
+    }
+
+  return false;
+}
+
+/* Indicate that INSN cannot be duplicated.  This is true for insn
+   that generates an unique label.  */
+
+static bool
+sh_cannot_copy_insn_p (insn)
+     rtx insn;
+{
+  rtx pat;
+
+  if (!reload_completed || !flag_pic)
+    return false;
+
+  if (GET_CODE (insn) != INSN)
+    return false;
+  if (asm_noperands (insn) >= 0)
+    return false;
+
+  pat = PATTERN (insn);
+  if (GET_CODE (pat) != SET)
+    return false;
+  pat = SET_SRC (pat);
+
+  if (unspec_caller_rtx_p (pat))
+    return true;
+
+  return false;
+}
+
 /* Actual number of instructions used to make a shift by N.  */
 static const char ashiftrt_insns[] =
   { 0,1,2,3,4,5,8,8,8,8,8,8,8,8,8,8,2,3,4,5,8,8,8,8,8,8,8,8,8,8,8,2};