Fix PR target/49335

2011-06-24  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>

	PR target/49335
	* config/arm/predicates.md (add_operator): New.
	* config/arm/arm.md ("*arith_shiftsi"): Fix for SP reg usage
	in Thumb2.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175375 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f91e1a6..7eb8225 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2011-06-24  Ramana Radhakrishnan  <ramana.radhakrishnan@linaro.org>
+
+       PR target/49335
+       * config/arm/predicates.md (add_operator): New.
+       * config/arm/arm.md ("*arith_shiftsi"): Fix for SP reg usage
+       in Thumb2.
+
 2011-06-24  Andi Kleen  <ak@linux.intel.com>
 
        * tree-sra.c (type_internals_preclude_sra_p): Add msg

diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md
index 431208e..26291af 100644 (file)
--- a/gcc/config/arm/arm.md
+++ b/gcc/config/arm/arm.md
@@ -8632,18 +8632,22 @@
 ;; Patterns to allow combination of arithmetic, cond code and shifts
 
 (define_insn "*arith_shiftsi"
-  [(set (match_operand:SI 0 "s_register_operand" "=r,r")
+  [(set (match_operand:SI 0 "s_register_operand" "=r,r,r,r")
         (match_operator:SI 1 "shiftable_operator"
           [(match_operator:SI 3 "shift_operator"
-             [(match_operand:SI 4 "s_register_operand" "r,r")
-              (match_operand:SI 5 "shift_amount_operand" "M,r")])
-           (match_operand:SI 2 "s_register_operand" "rk,rk")]))]
+             [(match_operand:SI 4 "s_register_operand" "r,r,r,r")
+              (match_operand:SI 5 "shift_amount_operand" "M,M,M,r")])
+           (match_operand:SI 2 "s_register_operand" "rk,rk,r,rk")]))]
   "TARGET_32BIT"
   "%i1%?\\t%0, %2, %4%S3"
   [(set_attr "predicable" "yes")
    (set_attr "shift" "4")
-   (set_attr "arch" "32,a")
-   ;; We have to make sure to disable the second alternative if
+   (set_attr "arch" "a,t2,t2,a")
+   ;; Thumb2 doesn't allow the stack pointer to be used for 
+   ;; operand1 for all operations other than add and sub. In this case 
+   ;; the minus operation is a candidate for an rsub and hence needs
+   ;; to be disabled.
+   ;; We have to make sure to disable the fourth alternative if
    ;; the shift_operator is MULT, since otherwise the insn will
    ;; also match a multiply_accumulate pattern and validate_change
    ;; will allow a replacement of the constant with a register
@@ -8651,9 +8655,13 @@
    (set_attr_alternative "insn_enabled"
                         [(const_string "yes")
                          (if_then_else
+                          (match_operand:SI 1 "add_operator" "")
+                          (const_string "yes") (const_string "no"))
+                         (const_string "yes")
+                         (if_then_else
                           (match_operand:SI 3 "mult_operator" "")
                           (const_string "no") (const_string "yes"))])
-   (set_attr "type" "alu_shift,alu_shift_reg")])
+   (set_attr "type" "alu_shift,alu_shift,alu_shift,alu_shift_reg")])
 
 (define_split
   [(set (match_operand:SI 0 "s_register_operand" "")

diff --git a/gcc/config/arm/predicates.md b/gcc/config/arm/predicates.md
index ec5de69..4bd8af1 100644 (file)
--- a/gcc/config/arm/predicates.md
+++ b/gcc/config/arm/predicates.md
@@ -707,3 +707,6 @@
 (define_special_predicate "neon_struct_operand"
   (and (match_code "mem")
        (match_test "TARGET_32BIT && neon_vector_mem_operand (op, 2)")))
+
+(define_special_predicate "add_operator"
+  (match_code "plus"))