Add -mlong-calls.

From-SVN: r3770

gcc/config/mips/mips.h

@@ -463,7 +463,7 @@ while (0)
 
 /* Print subsidiary information on the compiler version in use.  */
 
-#define MIPS_VERSION "[AL 1.1, MM 34]"
+#define MIPS_VERSION "[AL 1.1, MM 35]"
 
 #ifndef MACHINE_TYPE
 #define MACHINE_TYPE "BSD Mips"
@@ -683,23 +683,18 @@ do {							\
 #define MASK_FLOAT64	0x00000200	/* fp registers are 64 bits */
 #define MASK_ABICALLS	0x00000400	/* emit .abicalls/.cprestore/.cpload */
 #define MASK_HALF_PIC	0x00000800	/* Emit OSF-style pic refs to externs*/
-#define MASK_UNUSED1	0x00001000
-#define MASK_UNUSED2	0x00002000
-#define MASK_UNUSED3	0x00004000
-#define MASK_UNUSED4	0x00008000
-#define MASK_UNUSED5	0x00010000
-#define MASK_UNUSED6	0x00020000
-#define MASK_UNUSED7	0x00040000
-#define MASK_UNUSED8	0x00080000
+#define MASK_LONG_CALLS	0x00001000	/* Always call through a register */
+#define MASK_UNUSED1	0x00002000
+#define MASK_UNUSED2	0x00004000
+#define MASK_UNUSED3	0x00008000
+#define MASK_UNUSED4	0x00010000
+#define MASK_UNUSED5	0x00020000
+#define MASK_UNUSED6	0x00040000
+#define MASK_UNUSED7	0x00080000
 
 					/* Dummy switches used only in spec's*/
 #define MASK_MIPS_TFILE	0x00000000	/* flag for mips-tfile usage */
 
-					/* switches not used yet */
-#define MASK_WC8	0x00000000	/* wchar's are  8 bits, not 32 */
-#define MASK_WC16	0x00000000	/* wchar's are 16 bits, not 32 */
-#define MASK_WC32	0x00000000	/* dummy for consistency */
-
 					/* Debug switches, not documented */
 #define MASK_DEBUG	0x40000000	/* Eliminate version # in .s file */
 #define MASK_DEBUG_A	0x20000000	/* don't allow <label>($reg) addrs */
@@ -755,15 +750,13 @@ do {							\
 					/* OSF pic references to externs */
 #define TARGET_HALF_PIC		(target_flags & MASK_HALF_PIC)
 
-					/* wchar size */
-#define TARGET_WC8		(target_flags & MASK_WC8)
-#define TARGET_WC16		(target_flags & MASK_WC16)
-#define TARGET_WC32		((target_flags & (MASK_WC8 | MASK_WC16)) == 0)
-
 					/* software floating point */
 #define TARGET_SOFT_FLOAT	(target_flags & MASK_SOFT_FLOAT)
 #define TARGET_HARD_FLOAT	(! TARGET_SOFT_FLOAT)
 
+					/* always call through a register */
+#define TARGET_LONG_CALLS	(target_flags & MASK_LONG_CALLS)
+
 /* Macro to define tables used to set the flags.
    This is a list in braces of pairs in braces,
    each pair being { "NAME", VALUE }
@@ -787,9 +780,6 @@ do {							\
   {"no-stats",		 -MASK_STATS},					\
   {"memcpy",		  MASK_MEMCPY},					\
   {"no-memcpy",		 -MASK_MEMCPY},					\
-  {"wc8",		  MASK_WC8},					\
-  {"wc16",		  MASK_WC16},					\
-  {"wc32",		  MASK_WC32},					\
   {"mips-tfile",	  MASK_MIPS_TFILE},				\
   {"no-mips-tfile",	 -MASK_MIPS_TFILE},				\
   {"soft-float",	  MASK_SOFT_FLOAT},				\
@@ -800,6 +790,8 @@ do {							\
   {"no-abicalls",	 -MASK_ABICALLS},				\
   {"half-pic",		  MASK_HALF_PIC},				\
   {"no-half-pic",	 -MASK_HALF_PIC},				\
+  {"long-calls",	  MASK_LONG_CALLS},				\
+  {"no-long-calls",	 -MASK_LONG_CALLS},				\
   {"debug",		  MASK_DEBUG},					\
   {"debuga",		  MASK_DEBUG_A},				\
   {"debugb",		  MASK_DEBUG_B},				\

gcc/config/mips/mips.md

@@ -4054,7 +4054,7 @@ move\\t%0,%z4\\n\\
   if (operands[0])		/* eliminate unused code warnings */
     {
       addr = XEXP (operands[0], 0);
-      if (GET_CODE (addr) != REG && !CONSTANT_ADDRESS_P (addr))
+      if (GET_CODE (addr) != REG && (!CONSTANT_ADDRESS_P (addr) || TARGET_LONG_CALLS))
 	XEXP (operands[0], 0) = force_reg (FUNCTION_MODE, addr);
 
       /* In order to pass small structures by value in registers
@@ -4074,17 +4074,17 @@ move\\t%0,%z4\\n\\
 	    emit_insn (RTVEC_ELT (adjust, i));
 	}
 
-      emit_call_insn (gen_call_internal (operands[0], operands[1],
-					 gen_rtx (REG, Pmode, GP_REG_FIRST + 31)));
+      emit_call_insn (gen_call_internal1 (operands[0], operands[1],
+					  gen_rtx (REG, Pmode, GP_REG_FIRST + 31)));
       DONE;
     }
 }")
 
-(define_insn "call_internal"
+(define_insn "call_internal1"
   [(call (match_operand 0 "memory_operand" "m")
 	 (match_operand 1 "" "i"))
    (clobber (match_operand:SI 2 "register_operand" "=d"))]
-  ""
+  "!TARGET_LONG_CALLS"
   "*
 {
   register rtx target = XEXP (operands[0], 0);
@@ -4108,6 +4108,17 @@ move\\t%0,%z4\\n\\
    (set_attr "mode"	"none")
    (set_attr "length"	"1")])
 
+(define_insn "call_internal2"
+  [(call (mem:SI (match_operand:SI 0 "register_operand" "r"))
+	 (match_operand 1 "" "i"))
+   (clobber (match_operand:SI 2 "register_operand" "=d"))]
+  "TARGET_LONG_CALLS"
+  "%*jal\\t%2,%0"
+  [(set_attr "type"	"call")
+   (set_attr "mode"	"none")
+   (set_attr "length"	"1")])
+
+
 ;; calls.c now passes a fourth argument, make saber happy
 
 (define_expand "call_value"
@@ -4124,7 +4135,7 @@ move\\t%0,%z4\\n\\
   if (operands[0])		/* eliminate unused code warning */
     {
       addr = XEXP (operands[1], 0);
-      if (GET_CODE (addr) != REG && !CONSTANT_ADDRESS_P (addr))
+      if (GET_CODE (addr) != REG && (!CONSTANT_ADDRESS_P (addr) || TARGET_LONG_CALLS))
 	XEXP (operands[1], 0) = force_reg (FUNCTION_MODE, addr);
 
       /* In order to pass small structures by value in registers
@@ -4144,20 +4155,20 @@ move\\t%0,%z4\\n\\
 	    emit_insn (RTVEC_ELT (adjust, i));
 	}
 
-      emit_call_insn (gen_call_value_internal (operands[0], operands[1], operands[2],
-					       gen_rtx (REG, Pmode, GP_REG_FIRST + 31)));
+      emit_call_insn (gen_call_value_internal1 (operands[0], operands[1], operands[2],
+					        gen_rtx (REG, Pmode, GP_REG_FIRST + 31)));
 
       DONE;
     }
 
 }")
 
-(define_insn "call_value_internal"
+(define_insn "call_value_internal1"
   [(set (match_operand 0 "register_operand" "=df")
         (call (match_operand 1 "memory_operand" "m")
               (match_operand 2 "" "i")))
    (clobber (match_operand:SI 3 "register_operand" "=d"))]
-  ""
+  "!TARGET_LONG_CALLS"
   "*
 {
   register rtx target = XEXP (operands[1], 0);
@@ -4181,6 +4192,17 @@ move\\t%0,%z4\\n\\
    (set_attr "mode"	"none")
    (set_attr "length"	"1")])
 
+(define_insn "call_value_internal2"
+  [(set (match_operand 0 "register_operand" "=df")
+        (call (mem:SI (match_operand:SI 1 "register_operand" "r"))
+	      (match_operand 2 "" "i")))
+   (clobber (match_operand:SI 3 "register_operand" "=d"))]
+  "TARGET_LONG_CALLS"
+  "%*jal\\t%3,%1"
+  [(set_attr "type"	"call")
+   (set_attr "mode"	"none")
+   (set_attr "length"	"1")])
+
 
 ;;
 ;;  ....................