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* arm.c (FL_FOR_ARCH_7A): is also a superset of ARMv6K.
authorrearnsha <rearnsha@138bc75d-0d04-0410-961f-82ee72b054a4>
Mon, 1 Feb 2010 15:09:20 +0000 (15:09 +0000)
committerrearnsha <rearnsha@138bc75d-0d04-0410-961f-82ee72b054a4>
Mon, 1 Feb 2010 15:09:20 +0000 (15:09 +0000)
(arm_override_options): Allow automatic selection of the thread
pointer register if thumb2.
(legitimize_pic_address): Improve code sequences for Thumb2.
(arm_call_tls_get_addr): Likewise.
(legitimize_tls_address): Likewise.
* arm.md (pic_load_addr_arm): Delete.  Replace with ...
(pic_load_addr_32bit): ... this.  New named pattern.
* thumb2.md (pic_load_addr_thumb2): Delete.
(pic_load_dot_plus_four): Delete.
(tls_load_dot_plus_four): New named pattern.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@156428 138bc75d-0d04-0410-961f-82ee72b054a4

gcc/ChangeLog
gcc/config/arm/arm.c
gcc/config/arm/arm.md
gcc/config/arm/thumb2.md

index a47a8df..c52c23b 100644 (file)
@@ -1,3 +1,17 @@
+2010-02-01  Richard Earnshaw  <rearnsha@arm.com>
+
+       * arm.c (FL_FOR_ARCH_7A): is also a superset of ARMv6K.
+       (arm_override_options): Allow automatic selection of the thread
+       pointer register if thumb2.
+       (legitimize_pic_address): Improve code sequences for Thumb2.
+       (arm_call_tls_get_addr): Likewise.
+       (legitimize_tls_address): Likewise.
+       * arm.md (pic_load_addr_arm): Delete.  Replace with ...
+       (pic_load_addr_32bit): ... this.  New named pattern.
+       * thumb2.md (pic_load_addr_thumb2): Delete.
+       (pic_load_dot_plus_four): Delete.
+       (tls_load_dot_plus_four): New named pattern.
+
 2010-02-01  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
        PR libgomp/29986
index ffff9ab..543498e 100644 (file)
@@ -601,7 +601,7 @@ static int thumb_call_reg_needed;
 #define FL_FOR_ARCH6T2 (FL_FOR_ARCH6 | FL_THUMB2)
 #define FL_FOR_ARCH6M  (FL_FOR_ARCH6 & ~FL_NOTM)
 #define FL_FOR_ARCH7   (FL_FOR_ARCH6T2 &~ FL_NOTM)
-#define FL_FOR_ARCH7A  (FL_FOR_ARCH7 | FL_NOTM)
+#define FL_FOR_ARCH7A  (FL_FOR_ARCH7 | FL_NOTM | FL_ARCH6K)
 #define FL_FOR_ARCH7R  (FL_FOR_ARCH7A | FL_DIV)
 #define FL_FOR_ARCH7M  (FL_FOR_ARCH7 | FL_DIV)
 #define FL_FOR_ARCH7EM  (FL_FOR_ARCH7M | FL_ARCH7EM)
@@ -1758,7 +1758,7 @@ arm_override_options (void)
   /* Use the cp15 method if it is available.  */
   if (target_thread_pointer == TP_AUTO)
     {
-      if (arm_arch6k && !TARGET_THUMB)
+      if (arm_arch6k && !TARGET_THUMB1)
        target_thread_pointer = TP_CP15;
       else
        target_thread_pointer = TP_SOFT;
@@ -4926,10 +4926,8 @@ legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
       else
        address = reg;
 
-      if (TARGET_ARM)
-       emit_insn (gen_pic_load_addr_arm (address, orig));
-      else if (TARGET_THUMB2)
-       emit_insn (gen_pic_load_addr_thumb2 (address, orig));
+      if (TARGET_32BIT)
+       emit_insn (gen_pic_load_addr_32bit (address, orig));
       else /* TARGET_THUMB1 */
        emit_insn (gen_pic_load_addr_thumb1 (address, orig));
 
@@ -5106,7 +5104,7 @@ arm_load_pic_register (unsigned long saved_regs ATTRIBUTE_UNUSED)
     {
       pic_rtx = gen_rtx_SYMBOL_REF (Pmode, VXWORKS_GOTT_BASE);
       pic_rtx = gen_rtx_CONST (Pmode, pic_rtx);
-      emit_insn (gen_pic_load_addr_arm (pic_reg, pic_rtx));
+      emit_insn (gen_pic_load_addr_32bit (pic_reg, pic_rtx));
 
       emit_insn (gen_rtx_SET (Pmode, pic_reg, gen_rtx_MEM (Pmode, pic_reg)));
 
@@ -5129,29 +5127,13 @@ arm_load_pic_register (unsigned long saved_regs ATTRIBUTE_UNUSED)
                                UNSPEC_GOTSYM_OFF);
       pic_rtx = gen_rtx_CONST (Pmode, pic_rtx);
 
-      if (TARGET_ARM)
-       {
-         emit_insn (gen_pic_load_addr_arm (pic_reg, pic_rtx));
-         emit_insn (gen_pic_add_dot_plus_eight (pic_reg, pic_reg, labelno));
-       }
-      else if (TARGET_THUMB2)
+      if (TARGET_32BIT)
        {
-         /* Thumb-2 only allows very limited access to the PC.  Calculate the
-            address in a temporary register.  */
-         if (arm_pic_register != INVALID_REGNUM)
-           {
-             pic_tmp = gen_rtx_REG (SImode,
-                                    thumb_find_work_register (saved_regs));
-           }
+         emit_insn (gen_pic_load_addr_32bit (pic_reg, pic_rtx));
+         if (TARGET_ARM)
+           emit_insn (gen_pic_add_dot_plus_eight (pic_reg, pic_reg, labelno));
          else
-           {
-             gcc_assert (can_create_pseudo_p ());
-             pic_tmp = gen_reg_rtx (Pmode);
-           }
-
-         emit_insn (gen_pic_load_addr_thumb2 (pic_reg, pic_rtx));
-         emit_insn (gen_pic_load_dot_plus_four (pic_tmp, labelno));
-         emit_insn (gen_addsi3 (pic_reg, pic_reg, pic_tmp));
+           emit_insn (gen_pic_add_dot_plus_four (pic_reg, pic_reg, labelno));
        }
       else /* TARGET_THUMB1 */
        {
@@ -5808,14 +5790,7 @@ arm_call_tls_get_addr (rtx x, rtx reg, rtx *valuep, int reloc)
   if (TARGET_ARM)
     emit_insn (gen_pic_add_dot_plus_eight (reg, reg, labelno));
   else if (TARGET_THUMB2)
-    {
-      rtx tmp;
-      /* Thumb-2 only allows very limited access to the PC.  Calculate
-        the address in a temporary register.  */
-      tmp = gen_reg_rtx (SImode);
-      emit_insn (gen_pic_load_dot_plus_four (tmp, labelno));
-      emit_insn (gen_addsi3(reg, reg, tmp));
-    }
+    emit_insn (gen_pic_add_dot_plus_four (reg, reg, labelno));
   else /* TARGET_THUMB1 */
     emit_insn (gen_pic_add_dot_plus_four (reg, reg, labelno));
 
@@ -5871,15 +5846,7 @@ legitimize_tls_address (rtx x, rtx reg)
       if (TARGET_ARM)
        emit_insn (gen_tls_load_dot_plus_eight (reg, reg, labelno));
       else if (TARGET_THUMB2)
-       {
-         rtx tmp;
-         /* Thumb-2 only allows very limited access to the PC.  Calculate
-            the address in a temporary register.  */
-         tmp = gen_reg_rtx (SImode);
-         emit_insn (gen_pic_load_dot_plus_four (tmp, labelno));
-         emit_insn (gen_addsi3(reg, reg, tmp));
-         emit_move_insn (reg, gen_const_mem (SImode, reg));
-       }
+       emit_insn (gen_tls_load_dot_plus_four (reg, reg, labelno));
       else
        {
          emit_insn (gen_pic_add_dot_plus_four (reg, reg, labelno));
index f50bf0b..3d0d7f2 100644 (file)
 ;; the insn alone, and to force the minipool generation pass to then move
 ;; the GOT symbol to memory.
 
-(define_insn "pic_load_addr_arm"
+(define_insn "pic_load_addr_32bit"
   [(set (match_operand:SI 0 "s_register_operand" "=r")
        (unspec:SI [(match_operand:SI 1 "" "mX")] UNSPEC_PIC_SYM))]
-  "TARGET_ARM && flag_pic"
+  "TARGET_32BIT && flag_pic"
   "ldr%?\\t%0, %1"
   [(set_attr "type" "load1")
-   (set (attr "pool_range")     (const_int 4096))
-   (set (attr "neg_pool_range") (const_int 4084))]
+   (set_attr "pool_range" "4096")
+   (set (attr "neg_pool_range")
+       (if_then_else (eq_attr "is_thumb" "no")
+                     (const_int 4084)
+                     (const_int 0)))]
 )
 
 (define_insn "pic_load_addr_thumb1"
                    (const_int 4)
                    (match_operand 2 "" "")]
                   UNSPEC_PIC_BASE))]
-  "TARGET_THUMB1"
+  "TARGET_THUMB"
   "*
   (*targetm.asm_out.internal_label) (asm_out_file, \"LPIC\",
                                     INTVAL (operands[2]));
index 5e4eeed..e367351 100644 (file)
    (set_attr "neg_pool_range" "*,*,*,*,0,*")]
 )
 
-;; ??? We can probably do better with thumb2
-(define_insn "pic_load_addr_thumb2"
-  [(set (match_operand:SI 0 "s_register_operand" "=r")
-       (unspec:SI [(match_operand:SI 1 "" "mX")] UNSPEC_PIC_SYM))]
-  "TARGET_THUMB2 && flag_pic"
-  "ldr%?\\t%0, %1"
-  [(set_attr "type" "load1")
-   (set_attr "pool_range" "4096")
-   (set_attr "neg_pool_range" "0")]
-)
-
-;; Set reg to the address of this instruction plus four.  The low two
-;; bits of the PC are always read as zero, so ensure the instructions is
-;; word aligned.
-(define_insn "pic_load_dot_plus_four"
-  [(set (match_operand:SI 0 "register_operand" "=r")
-       (unspec:SI [(const_int 4)
-                   (match_operand 1 "" "")]
-                  UNSPEC_PIC_BASE))]
+(define_insn "tls_load_dot_plus_four"
+  [(set (match_operand:SI 0 "register_operand" "=l,r")
+       (mem:SI (unspec:SI [(match_operand:SI 1 "register_operand" "+l,r")
+                           (const_int 4)
+                           (match_operand 2 "" "")]
+                          UNSPEC_PIC_BASE)))]
   "TARGET_THUMB2"
   "*
-  assemble_align(BITS_PER_WORD);
   (*targetm.asm_out.internal_label) (asm_out_file, \"LPIC\",
-                            INTVAL (operands[1]));
-  /* We use adr because some buggy gas assemble add r8, pc, #0
-     to add.w r8, pc, #0, not addw r8, pc, #0.  */
-  asm_fprintf (asm_out_file, \"\\tadr\\t%r, %LLPIC%d + 4\\n\",
-              REGNO(operands[0]), (int)INTVAL (operands[1]));
-  return \"\";
+                            INTVAL (operands[2]));
+  return \"add\\t%1, %|pc\;ldr%?\\t%0, [%1]\";
   "
-  [(set_attr "length" "6")]
+  [(set_attr "length" "4,6")]
 )
 
 ;; Thumb-2 always has load/store halfword instructions, so we can avoid a lot