nios2.h (enum reg_class): Add IJMP_REGS enum value.

2015-05-12  Chung-Lin Tang  <cltang@codesourcery.com>
	    Sandra Loosemore <sandra@codesourcery.com>

	gcc/
	* config/nios2/nios2.h (enum reg_class): Add IJMP_REGS enum
	value.
	(REG_CLASS_NAMES): Add "IJMP_REGS".
	(REG_CLASS_CONTENTS): Add new entry for IJMP_REGS.
	* config/nios2/nios2.md (indirect_jump,*tablejump): Adjust to
	use new "c" register constraint.
	* config/nios2/constraint.md (c): New register constraint
	corresponding to IJMP_REGS.


Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>

From-SVN: r223082

gcc/ChangeLog

+2015-05-12  Chung-Lin Tang  <cltang@codesourcery.com>
+	    Sandra Loosemore <sandra@codesourcery.com>
+
+	* config/nios2/nios2.h (enum reg_class): Add IJMP_REGS enum
+	value.
+	(REG_CLASS_NAMES): Add "IJMP_REGS".
+	(REG_CLASS_CONTENTS): Add new entry for IJMP_REGS.
+	* config/nios2/nios2.md (indirect_jump,*tablejump): Adjust to
+	use new "c" register constraint.
+	* config/nios2/constraint.md (c): New register constraint
+	corresponding to IJMP_REGS.
+
 2015-05-12  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* config/rs6000/rs6000.md (*rotlsi3_internal4, *rotlsi3_internal5,

gcc/config/nios2/constraints.md

@@ -39,6 +39,9 @@
 
 ;; Register constraints
 
+(define_register_constraint "c" "IJMP_REGS"
+  "A register suitable for an indirect jump.")
+
 (define_register_constraint "j" "SIB_REGS"
   "A register suitable for an indirect sibcall.")
 

gcc/config/nios2/nios2.h

@@ -173,6 +173,7 @@ enum reg_class
 {
   NO_REGS,
   SIB_REGS,
+  IJMP_REGS,
   GP_REGS,
   ALL_REGS,
   LIM_REG_CLASSES
@@ -183,6 +184,7 @@ enum reg_class
 #define REG_CLASS_NAMES   \
   {  "NO_REGS",		  \
      "SIB_REGS",	  \
+     "IJMP_REGS",	  \
      "GP_REGS",           \
      "ALL_REGS" }
 
@@ -190,10 +192,11 @@ enum reg_class
 
 #define REG_CLASS_CONTENTS			\
   {						\
-    /* NO_REGS  */ { 0, 0},			\
-    /* SIB_REGS */ { 0xfe0c, 0},		\
-    /* GP_REGS  */ {~0, 0},			\
-    /* ALL_REGS */ {~0,~0}			\
+    /* NO_REGS    */ { 0, 0},			\
+    /* SIB_REGS   */ { 0xfe0c, 0},		\
+    /* IJMP_REGS  */ { 0x7fffffff, 0},		\
+    /* GP_REGS    */ {~0, 0},			\
+    /* ALL_REGS   */ {~0,~0}			\
   }
 
 

gcc/config/nios2/nios2.md

@@ -697,7 +697,7 @@
 ; check or adjust for overflow.
 
 (define_insn "indirect_jump"
-  [(set (pc) (match_operand:SI 0 "register_operand" "r"))]
+  [(set (pc) (match_operand:SI 0 "register_operand" "c"))]
   ""
   "jmp\\t%0"
   [(set_attr "type" "control")])
@@ -811,7 +811,7 @@
 
 (define_insn "*tablejump"
   [(set (pc)
-        (match_operand:SI 0 "register_operand" "r"))
+        (match_operand:SI 0 "register_operand" "c"))
    (use (label_ref (match_operand 1 "" "")))]
   ""
   "jmp\\t%0"