[AArch64][2/2] Add constrain to address offset in storewb_pair/loadwb_pair insns

Add a pridicate to check whether the const offset is valid.
For 32-bit variant: -256 <= offset <= 252
For 64-bit variant: -512 <= offset <= 504

2014-07-29  Renlin Li  <renlin.li@arm.com>
2014-07-29  Jiong Wang  <jiong.wang@arm.com>

gcc/
  * config/aarch64/aarch64.c (offset_7bit_signed_scaled_p): Rename to
  aarch64_offset_7bit_signed_scaled_p, remove static and use it.
  * config/aarch64/aarch64-protos.h (aarch64_offset_7bit_signed_scaled_p):
  Declaration.
  * config/aarch64/predicates.md (aarch64_mem_pair_offset): Define new
  predicate.
  * config/aarch64/aarch64.md (loadwb_pair, storewb_pair): Use
  aarch64_mem_pair_offset.

From-SVN: r213487

5 files changed, 27 insertions, 10 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4ea7db6..3782894 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,15 @@
+2014-08-01  Renlin Li <renlin.li@arm.com>
+2014-08-01  Jiong Wang <jiong.wang@arm.com>
+
+	* config/aarch64/aarch64.c (offset_7bit_signed_scaled_p): Rename to
+	aarch64_offset_7bit_signed_scaled_p, remove static and use it.
+	* config/aarch64/aarch64-protos.h (aarch64_offset_7bit_signed_scaled_p):
+	Declaration.
+	* config/aarch64/predicates.md (aarch64_mem_pair_offset): Define new
+	predicate.
+	* config/aarch64/aarch64.md (loadwb_pair, storewb_pair): Use
+	aarch64_mem_pair_offset.
+
 2014-08-01  Jiong Wang <jiong.wang@arm.com>
 
 	* config/aarch64/aarch64.md (loadwb_pair<GPI:mode>_<P:mode>): Fix
diff --git a/gcc/config/aarch64/aarch64-protos.h b/gcc/config/aarch64/aarch64-protos.h
index 927a20e4..cca3bc9 100644
--- a/gcc/config/aarch64/aarch64-protos.h
+++ b/gcc/config/aarch64/aarch64-protos.h
@@ -194,6 +194,7 @@ bool aarch64_modes_tieable_p (enum machine_mode mode1,
 bool aarch64_move_imm (HOST_WIDE_INT, enum machine_mode);
 bool aarch64_mov_operand_p (rtx, enum aarch64_symbol_context,
 			    enum machine_mode);
+bool aarch64_offset_7bit_signed_scaled_p (enum machine_mode, HOST_WIDE_INT);
 char *aarch64_output_scalar_simd_mov_immediate (rtx, enum machine_mode);
 char *aarch64_output_simd_mov_immediate (rtx, enum machine_mode, unsigned);
 bool aarch64_pad_arg_upward (enum machine_mode, const_tree);
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 8a8e8a9..d3f2adb 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -3193,8 +3193,8 @@ aarch64_classify_index (struct aarch64_address_info *info, rtx x,
   return false;
 }
 
-static inline bool
-offset_7bit_signed_scaled_p (enum machine_mode mode, HOST_WIDE_INT offset)
+bool
+aarch64_offset_7bit_signed_scaled_p (enum machine_mode mode, HOST_WIDE_INT offset)
 {
   return (offset >= -64 * GET_MODE_SIZE (mode)
 	  && offset < 64 * GET_MODE_SIZE (mode)
@@ -3266,12 +3266,12 @@ aarch64_classify_address (struct aarch64_address_info *info,
 	     We conservatively require an offset representable in either mode.
 	   */
 	  if (mode == TImode || mode == TFmode)
-	    return (offset_7bit_signed_scaled_p (mode, offset)
+	    return (aarch64_offset_7bit_signed_scaled_p (mode, offset)
 		    && offset_9bit_signed_unscaled_p (mode, offset));
 
 	  if (outer_code == PARALLEL)
 	    return ((GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8)
-		    && offset_7bit_signed_scaled_p (mode, offset));
+		    && aarch64_offset_7bit_signed_scaled_p (mode, offset));
 	  else
 	    return (offset_9bit_signed_unscaled_p (mode, offset)
 		    || offset_12bit_unsigned_scaled_p (mode, offset));
@@ -3326,12 +3326,12 @@ aarch64_classify_address (struct aarch64_address_info *info,
 	     We conservatively require an offset representable in either mode.
 	   */
 	  if (mode == TImode || mode == TFmode)
-	    return (offset_7bit_signed_scaled_p (mode, offset)
+	    return (aarch64_offset_7bit_signed_scaled_p (mode, offset)
 		    && offset_9bit_signed_unscaled_p (mode, offset));
 
 	  if (outer_code == PARALLEL)
 	    return ((GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8)
-		    && offset_7bit_signed_scaled_p (mode, offset));
+		    && aarch64_offset_7bit_signed_scaled_p (mode, offset));
 	  else
 	    return offset_9bit_signed_unscaled_p (mode, offset);
 	}
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 0728fb6..eac4664 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -1022,7 +1022,7 @@
   [(parallel
     [(set (match_operand:P 0 "register_operand" "=k")
           (plus:P (match_operand:P 1 "register_operand" "0")
-                  (match_operand:P 4 "const_int_operand" "n")))
+                  (match_operand:P 4 "aarch64_mem_pair_offset" "n")))
      (set (match_operand:GPI 2 "register_operand" "=r")
           (mem:GPI (match_dup 1)))
      (set (match_operand:GPI 3 "register_operand" "=r")
@@ -1037,7 +1037,7 @@
   [(parallel
     [(set (match_operand:P 0 "register_operand" "=k")
           (plus:P (match_operand:P 1 "register_operand" "0")
-                  (match_operand:P 4 "const_int_operand" "n")))
+                  (match_operand:P 4 "aarch64_mem_pair_offset" "n")))
      (set (match_operand:GPF 2 "register_operand" "=w")
           (mem:GPF (match_dup 1)))
      (set (match_operand:GPF 3 "register_operand" "=w")
@@ -1054,7 +1054,7 @@
   [(parallel
     [(set (match_operand:P 0 "register_operand" "=&k")
           (plus:P (match_operand:P 1 "register_operand" "0")
-                  (match_operand:P 4 "const_int_operand" "n")))
+                  (match_operand:P 4 "aarch64_mem_pair_offset" "n")))
      (set (mem:GPI (plus:P (match_dup 0)
                    (match_dup 4)))
           (match_operand:GPI 2 "register_operand" "r"))
@@ -1070,7 +1070,7 @@
   [(parallel
     [(set (match_operand:P 0 "register_operand" "=&k")
           (plus:P (match_operand:P 1 "register_operand" "0")
-                  (match_operand:P 4 "const_int_operand" "n")))
+                  (match_operand:P 4 "aarch64_mem_pair_offset" "n")))
      (set (mem:GPF (plus:P (match_dup 0)
                    (match_dup 4)))
           (match_operand:GPF 2 "register_operand" "w"))
diff --git a/gcc/config/aarch64/predicates.md b/gcc/config/aarch64/predicates.md
index 95d1910..3dd83ca 100644
--- a/gcc/config/aarch64/predicates.md
+++ b/gcc/config/aarch64/predicates.md
@@ -123,6 +123,10 @@
        (match_test "INTVAL (op) != 0
 		    && (unsigned) exact_log2 (INTVAL (op)) < 64")))
 
+(define_predicate "aarch64_mem_pair_offset"
+  (and (match_code "const_int")
+       (match_test "aarch64_offset_7bit_signed_scaled_p (mode, INTVAL (op))")))
+
 (define_predicate "aarch64_mem_pair_operand"
   (and (match_code "mem")
        (match_test "aarch64_legitimate_address_p (mode, XEXP (op, 0), PARALLEL,