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RFA: Add a common tls_referenced_p function


Three targets had the same for_each_rtx function to check for a TLS symbol.
This patch adds a generic version instead.

Some other targets have a variation that checks for target-specific
UNSPEC sequences too so I've left those alone.  They're all prefixed
by the target name so there's no name clash or ambiguity.

Tested on mips64-linux-gnu and via a cross-compiler for
powerpc64-linux-gnu and hppa64-hp-hpux11.23.  OK to install?

Thanks,
Richard


gcc/
	* rtl.h (tls_referenced_p): Declare.
	* rtlanal.c (tls_referenced_p_1, tls_referenced_p): New functions.
	* config/mips/mips.c (mips_tls_symbol_ref_1): Delete.
	(mips_cannot_force_const_mem): Use tls_referenced_p.
	* config/pa/pa-protos.h (pa_tls_referenced_p): Delete.
	* config/pa/pa.h (CONSTANT_ADDRESS_P): Use tls_referenced_p
	instead of pa_tls_referenced_p.
	* config/pa/pa.c (hppa_legitimize_address, pa_cannot_force_const_mem)
	(pa_emit_move_sequence, pa_emit_move_sequence): Likewise.
	(pa_legitimate_constant_p): Likewise.
	(pa_tls_symbol_ref_1, pa_tls_referenced_p): Delete.
	* config/rs6000/rs6000.c (rs6000_tls_referenced_p): Delete.
	(rs6000_cannot_force_const_mem, rs6000_emit_move)
	(rs6000_address_for_altivec): Use tls_referenced_p instead of
	rs6000_tls_referenced_p.
	(rs6000_tls_symbol_ref_1): Delete.

Index: gcc/rtl.h
===================================================================
--- gcc/rtl.h	2014-07-24 16:17:57.804445472 +0100
+++ gcc/rtl.h	2014-07-24 16:42:55.788314641 +0100
@@ -2292,6 +2292,7 @@ extern int replace_label (rtx *, void *)
 extern int rtx_referenced_p (rtx, rtx);
 extern bool tablejump_p (const_rtx, rtx *, rtx *);
 extern int computed_jump_p (const_rtx);
+extern bool tls_referenced_p (rtx);
 
 typedef int (*rtx_function) (rtx *, void *);
 extern int for_each_rtx (rtx *, rtx_function, void *);
Index: gcc/rtlanal.c
===================================================================
--- gcc/rtlanal.c	2014-07-24 16:11:17.367474535 +0100
+++ gcc/rtlanal.c	2014-07-24 16:42:55.789314647 +0100
@@ -5960,3 +5960,22 @@ get_index_code (const struct address_inf
 
   return SCRATCH;
 }
+
+/* Return 1 if *X is a thread-local symbol.  */
+
+static int
+tls_referenced_p_1 (rtx *x, void *)
+{
+  return GET_CODE (*x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (*x) != 0;
+}
+
+/* Return true if X contains a thread-local symbol.  */
+
+bool
+tls_referenced_p (rtx x)
+{
+  if (!targetm.have_tls)
+    return false;
+
+  return for_each_rtx (&x, &tls_referenced_p_1, 0);
+}
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c	2014-07-24 16:12:51.943409858 +0100
+++ gcc/config/mips/mips.c	2014-07-24 16:42:55.779314588 +0100
@@ -2171,15 +2171,6 @@ mips_symbol_insns (enum mips_symbol_type
   return mips_symbol_insns_1 (type, mode) * (TARGET_MIPS16 ? 2 : 1);
 }
 
-/* A for_each_rtx callback.  Stop the search if *X references a
-   thread-local symbol.  */
-
-static int
-mips_tls_symbol_ref_1 (rtx *x, void *data ATTRIBUTE_UNUSED)
-{
-  return mips_tls_symbol_p (*x);
-}
-
 /* Implement TARGET_CANNOT_FORCE_CONST_MEM.  */
 
 static bool
@@ -2223,7 +2214,7 @@ mips_cannot_force_const_mem (enum machin
     }
 
   /* TLS symbols must be computed by mips_legitimize_move.  */
-  if (for_each_rtx (&x, &mips_tls_symbol_ref_1, NULL))
+  if (tls_referenced_p (x))
     return true;
 
   return false;
Index: gcc/config/pa/pa-protos.h
===================================================================
--- gcc/config/pa/pa-protos.h	2014-07-24 16:11:17.367474535 +0100
+++ gcc/config/pa/pa-protos.h	2014-07-24 16:42:55.780314594 +0100
@@ -54,7 +54,6 @@ extern void pa_output_global_address (FI
 extern void pa_print_operand (FILE *, rtx, int);
 extern void pa_encode_label (rtx);
 extern int pa_symbolic_expression_p (rtx);
-extern bool pa_tls_referenced_p (rtx);
 extern int pa_adjust_insn_length (rtx, int);
 extern int pa_fmpyaddoperands (rtx *);
 extern int pa_fmpysuboperands (rtx *);
Index: gcc/config/pa/pa.h
===================================================================
--- gcc/config/pa/pa.h	2014-07-24 16:11:17.367474535 +0100
+++ gcc/config/pa/pa.h	2014-07-24 16:42:55.782314606 +0100
@@ -797,7 +797,7 @@ #define CONSTANT_ADDRESS_P(X) \
   ((GET_CODE (X) == LABEL_REF 						\
    || (GET_CODE (X) == SYMBOL_REF && !SYMBOL_REF_TLS_MODEL (X))		\
    || GET_CODE (X) == CONST_INT						\
-   || (GET_CODE (X) == CONST && !pa_tls_referenced_p (X))		\
+   || (GET_CODE (X) == CONST && !tls_referenced_p (X))			\
    || GET_CODE (X) == HIGH) 						\
    && (reload_in_progress || reload_completed				\
        || ! pa_symbolic_expression_p (X)))
Index: gcc/config/pa/pa.c
===================================================================
--- gcc/config/pa/pa.c	2014-07-24 16:11:17.367474535 +0100
+++ gcc/config/pa/pa.c	2014-07-24 16:42:55.782314606 +0100
@@ -1037,7 +1037,7 @@ hppa_legitimize_address (rtx x, rtx oldx
       && !REG_POINTER (XEXP (x, 1)))
     return gen_rtx_PLUS (Pmode, XEXP (x, 1), XEXP (x, 0));
 
-  if (pa_tls_referenced_p (x))
+  if (tls_referenced_p (x))
     return legitimize_tls_address (x);
   else if (flag_pic)
     return legitimize_pic_address (x, mode, gen_reg_rtx (Pmode));
@@ -1542,31 +1542,12 @@ force_mode (enum machine_mode mode, rtx
   return gen_rtx_REG (mode, REGNO (orig));
 }
 
-/* Return 1 if *X is a thread-local symbol.  */
-
-static int
-pa_tls_symbol_ref_1 (rtx *x, void *data ATTRIBUTE_UNUSED)
-{
-  return PA_SYMBOL_REF_TLS_P (*x);
-}
-
-/* Return 1 if X contains a thread-local symbol.  */
-
-bool
-pa_tls_referenced_p (rtx x)
-{
-  if (!TARGET_HAVE_TLS)
-    return false;
-
-  return for_each_rtx (&x, &pa_tls_symbol_ref_1, 0);
-}
-
 /* Implement TARGET_CANNOT_FORCE_CONST_MEM.  */
 
 static bool
 pa_cannot_force_const_mem (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x)
 {
-  return pa_tls_referenced_p (x);
+  return tls_referenced_p (x);
 }
 
 /* Emit insns to move operands[1] into operands[0].
@@ -1921,7 +1902,7 @@ pa_emit_move_sequence (rtx *operands, en
       || (GET_CODE (operand1) == HIGH
 	  && symbolic_operand (XEXP (operand1, 0), mode))
       || function_label_operand (operand1, VOIDmode)
-      || pa_tls_referenced_p (operand1))
+      || tls_referenced_p (operand1))
     {
       int ishighonly = 0;
 
@@ -2081,7 +2062,7 @@ pa_emit_move_sequence (rtx *operands, en
 	    }
 	  return 1;
 	}
-      else if (pa_tls_referenced_p (operand1))
+      else if (tls_referenced_p (operand1))
 	{
 	  rtx tmp = operand1;
 	  rtx addend = NULL;
@@ -10293,7 +10274,7 @@ pa_legitimate_constant_p (enum machine_m
   /* TLS_MODEL_GLOBAL_DYNAMIC and TLS_MODEL_LOCAL_DYNAMIC are not
      legitimate constants.  The other variants can't be handled by
      the move patterns after reload starts.  */
-  if (pa_tls_referenced_p (x))
+  if (tls_referenced_p (x))
     return false;
 
   if (TARGET_64BIT && GET_CODE (x) == CONST_DOUBLE)
Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c	2014-07-24 16:12:55.744447485 +0100
+++ gcc/config/rs6000/rs6000.c	2014-07-24 16:42:55.787314635 +0100
@@ -1101,7 +1101,6 @@ static void is_altivec_return_reg (rtx,
 int easy_vector_constant (rtx, enum machine_mode);
 static rtx rs6000_debug_legitimize_address (rtx, rtx, enum machine_mode);
 static rtx rs6000_legitimize_tls_address (rtx, enum tls_model);
-static int rs6000_tls_symbol_ref_1 (rtx *, void *);
 static int rs6000_get_some_local_dynamic_name_1 (rtx *, void *);
 static rtx rs6000_darwin64_record_arg (CUMULATIVE_ARGS *, const_tree,
 				       bool, bool);
@@ -7228,17 +7227,6 @@ rs6000_legitimize_tls_address (rtx addr,
   return dest;
 }
 
-/* Return 1 if X contains a thread-local symbol.  */
-
-static bool
-rs6000_tls_referenced_p (rtx x)
-{
-  if (! TARGET_HAVE_TLS)
-    return false;
-
-  return for_each_rtx (&x, &rs6000_tls_symbol_ref_1, 0);
-}
-
 /* Implement TARGET_CANNOT_FORCE_CONST_MEM.  */
 
 static bool
@@ -7256,16 +7244,7 @@ rs6000_cannot_force_const_mem (enum mach
     return true;
 
   /* Do not place an ELF TLS symbol in the constant pool.  */
-  return TARGET_ELF && rs6000_tls_referenced_p (x);
-}
-
-/* Return 1 if *X is a thread-local symbol.  This is the same as
-   rs6000_tls_symbol_ref except for the type of the unused argument.  */
-
-static int
-rs6000_tls_symbol_ref_1 (rtx *x, void *data ATTRIBUTE_UNUSED)
-{
-  return RS6000_SYMBOL_REF_TLS_P (*x);
+  return TARGET_ELF && tls_referenced_p (x);
 }
 
 /* Return true iff the given SYMBOL_REF refers to a constant pool entry
@@ -8214,7 +8193,7 @@ rs6000_emit_move (rtx dest, rtx source,
 
   /* Recognize the case where operand[1] is a reference to thread-local
      data and load its address to a register.  */
-  if (rs6000_tls_referenced_p (operands[1]))
+  if (tls_referenced_p (operands[1]))
     {
       enum tls_model model;
       rtx tmp = operands[1];
@@ -32324,7 +32303,7 @@ rs6000_address_for_altivec (rtx x)
 static bool
 rs6000_legitimate_constant_p (enum machine_mode mode, rtx x)
 {
-  if (TARGET_ELF && rs6000_tls_referenced_p (x))
+  if (TARGET_ELF && tls_referenced_p (x))
     return false;
 
   return ((GET_CODE (x) != CONST_DOUBLE && GET_CODE (x) != CONST_VECTOR)


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