- GCC extension for protecting applications from stack-smashing attacks

[packages/gcc.git] / gcc32-sparc-sll1.patch

2002-05-05  Jakub Jelinek  <jakub@redhat.com>

	* config/sparc/sparc.md (ashlsi3): If shift count is const1_rtx,
	use add instead of shift.
	(ashldi3_sp64): Likewise.
	(ashlsi3_const1, ashldi3_const1): Remove.
	* config/sparc/sparc.h (PREDICATE_CODES): Add const1_operand.
	* config/sparc/sparc.c (const1_operand): New.

--- gcc/config/sparc/sparc.md.jj	Sun May  5 21:56:45 2002
+++ gcc/config/sparc/sparc.md	Sun May  5 23:33:31 2002
@@ -7559,18 +7559,13 @@
       && (unsigned HOST_WIDE_INT) INTVAL (operands[2]) > 31)
     operands[2] = GEN_INT (INTVAL (operands[2]) & 0x1f);
 
+  if (operands[2] == const1_rtx)
+    return \"add\\t%1, %1, %0\";
   return \"sll\\t%1, %2, %0\";
 }"
-  [(set_attr "type" "shift")])
-
-;; We special case multiplication by two, as add can be done
-;; in both ALUs, while shift only in IEU0 on UltraSPARC.
-(define_insn "*ashlsi3_const1"
-  [(set (match_operand:SI 0 "register_operand" "=r")
-        (ashift:SI (match_operand:SI 1 "register_operand" "r")
-                   (const_int 1)))]
-  ""
-  "add\\t%1, %1, %0")
+  [(set (attr "type")
+	(if_then_else (match_operand 2 "const1_operand" "")
+		      (const_string "ialu") (const_string "shift")))])
 
 (define_expand "ashldi3"
   [(set (match_operand:DI 0 "register_operand" "=r")
@@ -7588,15 +7583,6 @@
     }
 }")
 
-;; We special case multiplication by two, as add can be done
-;; in both ALUs, while shift only in IEU0 on UltraSPARC.
-(define_insn "*ashldi3_const1"
-  [(set (match_operand:DI 0 "register_operand" "=r")
-	(ashift:DI (match_operand:DI 1 "register_operand" "r")
-		   (const_int 1)))]
-  "TARGET_ARCH64"
-  "add\\t%1, %1, %0")
-
 (define_insn "*ashldi3_sp64"
   [(set (match_operand:DI 0 "register_operand" "=r")
 	(ashift:DI (match_operand:DI 1 "register_operand" "r")
@@ -7608,9 +7594,13 @@
       && (unsigned HOST_WIDE_INT) INTVAL (operands[2]) > 63)
     operands[2] = GEN_INT (INTVAL (operands[2]) & 0x3f);
 
+  if (operands[2] == const1_rtx)
+    return \"add\\t%1, %1, %0\";
   return \"sllx\\t%1, %2, %0\";
 }"
-  [(set_attr "type" "shift")])
+  [(set (attr "type")
+	(if_then_else (match_operand 2 "const1_operand" "")
+		      (const_string "ialu") (const_string "shift")))])
 
 ;; XXX UGH!
 (define_insn "ashldi3_v8plus"
--- gcc/config/sparc/sparc.h.jj	Fri May  3 22:57:33 2002
+++ gcc/config/sparc/sparc.h	Sun May  5 23:20:48 2002
@@ -3014,6 +3014,7 @@ do {									\
 
 #define PREDICATE_CODES							\
 {"reg_or_0_operand", {SUBREG, REG, CONST_INT, CONST_DOUBLE}},		\
+{"const1_operand", {CONST_INT}},					\
 {"fp_zero_operand", {CONST_DOUBLE}},					\
 {"fp_register_operand", {SUBREG, REG}},					\
 {"intreg_operand", {SUBREG, REG}},					\
--- gcc/config/sparc/sparc.c.jj	Fri May  3 22:57:33 2002
+++ gcc/config/sparc/sparc.c	Sun May  5 23:24:18 2002
@@ -478,6 +478,16 @@ reg_or_0_operand (op, mode)
   return 0;
 }
 
+/* Return non-zero only if OP is const1_rtx.  */
+
+int
+const1_operand (op, mode)
+     rtx op;
+     enum machine_mode mode ATTRIBUTE_UNUSED;
+{
+  return op == const1_rtx;
+}
+
 /* Nonzero if OP is a floating point value with value 0.0.  */
 
 int