configure.ac: Test if linker and assembler properly support GOTDATA_OP relocations.

gcc/

2010-02-20  David S. Miller  <davem@davemloft.net>

	* configure.ac: Test if linker and assembler properly support
	GOTDATA_OP relocations.
	* configure: Rebuild.
	* config.in: Likewise.
	* config/sparc/sparc.md (UNSPEC_MOVE_GOTDATA): New.
	(movsi_lo_sum_pic): Use %gdop_*() relocs if available.
	(movsi_high_pic): Likewise.
	(movdi_lo_sum_pic): Likewise.
	(movdi_high_pic): Likewise.
	(movsi_pic_gotdata_op): New pattern.
	(movdi_pic_gotdata_op): Likewise.
	* config/sparc/sparc.c (legitimize_pic_address): If flag_pic is 2,
	emit gen_mov{si,di}_pic_gotdata_op for the GOT slot load.

From-SVN: r156933

gcc/ChangeLog

@@ -1,3 +1,19 @@
+2010-02-20  David S. Miller  <davem@davemloft.net>
+
+	* configure.ac: Test if linker and assembler properly support
+	GOTDATA_OP relocations.
+	* configure: Rebuild.
+	* config.in: Likewise.
+	* config/sparc/sparc.md (UNSPEC_MOVE_GOTDATA): New.
+	(movsi_lo_sum_pic): Use %gdop_*() relocs if available.
+	(movsi_high_pic): Likewise.
+	(movdi_lo_sum_pic): Likewise.
+	(movdi_high_pic): Likewise.
+	(movsi_pic_gotdata_op): New pattern.
+	(movdi_pic_gotdata_op): Likewise.
+	* config/sparc/sparc.c (legitimize_pic_address): If flag_pic is 2,
+	emit gen_mov{si,di}_pic_gotdata_op for the GOT slot load.
+	
 2010-02-20  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/43067

gcc/config.in

@@ -417,6 +417,12 @@
 #endif
 
 
+/* Define if your assembler and linker support GOTDATA_OP relocs. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_AS_SPARC_GOTDATA_OP
+#endif
+
+
 /* Define if your assembler and linker support unaligned PC relative relocs.
    */
 #ifndef USED_FOR_TARGET

gcc/config/sparc/sparc.c

@@ -3374,6 +3374,8 @@ legitimize_tls_address (rtx addr)
 static rtx
 legitimize_pic_address (rtx orig, rtx reg)
 {
+  bool gotdata_op = false;
+
   if (GET_CODE (orig) == SYMBOL_REF
       /* See the comment in sparc_expand_move.  */
       || (TARGET_VXWORKS_RTP && GET_CODE (orig) == LABEL_REF))
@@ -3410,15 +3412,28 @@ legitimize_pic_address (rtx orig, rtx reg)
 	      emit_insn (gen_movsi_lo_sum_pic (temp_reg, temp_reg, orig));
 	    }
 	  address = temp_reg;
+	  gotdata_op = true;
 	}
       else
 	address = orig;
 
-      pic_ref = gen_const_mem (Pmode,
-			       gen_rtx_PLUS (Pmode,
-					     pic_offset_table_rtx, address));
       crtl->uses_pic_offset_table = 1;
-      insn = emit_move_insn (reg, pic_ref);
+      if (gotdata_op)
+	{
+	  if (TARGET_ARCH64)
+	    insn = emit_insn (gen_movdi_pic_gotdata_op (reg, pic_offset_table_rtx,
+							address, orig));
+	  else
+	    insn = emit_insn (gen_movsi_pic_gotdata_op (reg, pic_offset_table_rtx,
+							address, orig));
+	}
+      else
+	{
+	  pic_ref = gen_const_mem (Pmode,
+				   gen_rtx_PLUS (Pmode,
+						 pic_offset_table_rtx, address));
+	  insn = emit_move_insn (reg, pic_ref);
+	}
       /* Put a REG_EQUAL note on this insn, so that it can be optimized
 	 by loop.  */
       set_unique_reg_note (insn, REG_EQUAL, orig);

gcc/config/sparc/sparc.md

@@ -38,6 +38,7 @@
    (UNSPEC_EMB_TEXTHI		14)
    (UNSPEC_EMB_TEXTULO		15)
    (UNSPEC_EMB_SETHM		18)
+   (UNSPEC_MOVE_GOTDATA		19)
 
    (UNSPEC_MEMBAR		20)
 
@@ -1224,13 +1225,40 @@
         (lo_sum:SI (match_operand:SI 1 "register_operand" "r")
                    (unspec:SI [(match_operand:SI 2 "immediate_operand" "in")] UNSPEC_MOVE_PIC)))]
   "flag_pic"
-  "or\t%1, %%lo(%a2), %0")
+{
+#ifdef HAVE_AS_SPARC_GOTDATA_OP
+  return "xor\t%1, %%gdop_lox10(%a2), %0";
+#else
+  return "or\t%1, %%lo(%a2), %0";
+#endif
+})
 
 (define_insn "movsi_high_pic"
   [(set (match_operand:SI 0 "register_operand" "=r")
         (high:SI (unspec:SI [(match_operand 1 "" "")] UNSPEC_MOVE_PIC)))]
   "flag_pic && check_pic (1)"
-  "sethi\t%%hi(%a1), %0")
+{
+#ifdef HAVE_AS_SPARC_GOTDATA_OP
+  return "sethi\t%%gdop_hix22(%a1), %0";
+#else
+  return "sethi\t%%hi(%a1), %0";
+#endif
+})
+
+(define_insn "movsi_pic_gotdata_op"
+  [(set (match_operand:SI 0 "register_operand" "=r")
+        (unspec:SI [(match_operand:SI 1 "register_operand" "r")
+	            (match_operand:SI 2 "register_operand" "r")
+		    (match_operand 3 "symbolic_operand" "")] UNSPEC_MOVE_GOTDATA))]
+  "flag_pic && check_pic (1)"
+{
+#ifdef HAVE_AS_SPARC_GOTDATA_OP
+  return "ld\t[%1 + %2], %0, %%gdop(%a3)";
+#else
+  return "ld\t[%1 + %2], %0";
+#endif
+}
+  [(set_attr "type" "load")])
 
 (define_expand "movsi_pic_label_ref"
   [(set (match_dup 3) (high:SI
@@ -1430,13 +1458,40 @@
         (lo_sum:DI (match_operand:DI 1 "register_operand" "r")
                    (unspec:DI [(match_operand:DI 2 "immediate_operand" "in")] UNSPEC_MOVE_PIC)))]
   "TARGET_ARCH64 && flag_pic"
-  "or\t%1, %%lo(%a2), %0")
+{
+#ifdef HAVE_AS_SPARC_GOTDATA_OP
+  return "xor\t%1, %%gdop_lox10(%a2), %0";
+#else
+  return "or\t%1, %%lo(%a2), %0";
+#endif
+})
 
 (define_insn "movdi_high_pic"
   [(set (match_operand:DI 0 "register_operand" "=r")
         (high:DI (unspec:DI [(match_operand 1 "" "")] UNSPEC_MOVE_PIC)))]
   "TARGET_ARCH64 && flag_pic && check_pic (1)"
-  "sethi\t%%hi(%a1), %0")
+{
+#ifdef HAVE_AS_SPARC_GOTDATA_OP
+  return "sethi\t%%gdop_hix22(%a1), %0";
+#else
+  return "sethi\t%%hi(%a1), %0";
+#endif
+})
+
+(define_insn "movdi_pic_gotdata_op"
+  [(set (match_operand:DI 0 "register_operand" "=r")
+        (unspec:DI [(match_operand:DI 1 "register_operand" "r")
+	            (match_operand:DI 2 "register_operand" "r")
+		    (match_operand 3 "symbolic_operand" "")] UNSPEC_MOVE_GOTDATA))]
+  "TARGET_ARCH64 && flag_pic && check_pic (1)"
+{
+#ifdef HAVE_AS_SPARC_GOTDATA_OP
+  return "ldx\t[%1 + %2], %0, %%gdop(%a3)";
+#else
+  return "ldx\t[%1 + %2], %0";
+#endif
+}
+  [(set_attr "type" "load")])
 
 (define_insn "*sethi_di_medlow_embmedany_pic"
   [(set (match_operand:DI 0 "register_operand" "=r")

gcc/configure

@@ -22489,6 +22489,51 @@ if test $gcc_cv_as_sparc_relax = yes; then
 
 $as_echo "#define HAVE_AS_RELAX_OPTION 1" >>confdefs.h
 
+fi
+
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for GOTDATA_OP relocs" >&5
+$as_echo_n "checking assembler for GOTDATA_OP relocs... " >&6; }
+if test "${gcc_cv_as_sparc_gotdata_op+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  gcc_cv_as_sparc_gotdata_op=no
+  if test x$gcc_cv_as != x; then
+    echo '.text
+foo:
+	nop
+bar:
+	sethi %gdop_hix22(foo), %g1
+	xor    %g1, %gdop_lox10(foo), %g1
+	ld    [%l7 + %g1], %g2, %gdop(foo)' > conftest.s
+    if { ac_try='$gcc_cv_as $gcc_cv_as_flags -K PIC -o conftest.o conftest.s >&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+    then
+	if test x$gcc_cv_ld != x \
+       && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
+       && (test x$gnu_ld_flag = xno \
+           || (test x$gcc_cv_objdump != x \
+               && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
+                  | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1)); then
+	 gcc_cv_as_sparc_gotdata_op=yes
+       fi
+       rm -f conftest
+    else
+      echo "configure: failed program was" >&5
+      cat conftest.s >&5
+    fi
+    rm -f conftest.o conftest.s
+  fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_sparc_gotdata_op" >&5
+$as_echo "$gcc_cv_as_sparc_gotdata_op" >&6; }
+if test $gcc_cv_as_sparc_gotdata_op = yes; then
+
+$as_echo "#define HAVE_AS_SPARC_GOTDATA_OP 1" >>confdefs.h
+
 fi
 
     { $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for unaligned pcrel relocs" >&5

gcc/configure.ac

@@ -2944,6 +2944,28 @@ case "$target" in
       [AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
 		[Define if your assembler supports -relax option.])])
 
+    gcc_GAS_CHECK_FEATURE([GOTDATA_OP relocs],
+      gcc_cv_as_sparc_gotdata_op,,
+      [-K PIC],
+[.text
+foo:
+	nop
+bar:
+	sethi %gdop_hix22(foo), %g1
+	xor    %g1, %gdop_lox10(foo), %g1
+	ld    [[%l7 + %g1]], %g2, %gdop(foo)],
+      [if test x$gcc_cv_ld != x \
+       && $gcc_cv_ld -o conftest conftest.o -G > /dev/null 2>&1 \
+       && (test x$gnu_ld_flag = xno \
+           || (test x$gcc_cv_objdump != x \
+               && $gcc_cv_objdump -s -j .text conftest.o 2> /dev/null \
+                  | grep ' 03000004 82186004 c405c001'> /dev/null 2>&1)); then
+	 gcc_cv_as_sparc_gotdata_op=yes
+       fi
+       rm -f conftest],
+      [AC_DEFINE(HAVE_AS_SPARC_GOTDATA_OP, 1,
+		[Define if your assembler and linker support GOTDATA_OP relocs.])])
+
     gcc_GAS_CHECK_FEATURE([unaligned pcrel relocs],
       gcc_cv_as_sparc_ua_pcrel,,
       [-K PIC],