[ARC] Enable code density frame option for elf targets.

xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc.opt (mcode-density-frame): Get the inital value
	from TARGET_CODE_DENSITY_FRAME_DEFAULT.
	* config/arc/elf.h (TARGET_CODE_DENSITY_FRAME_DEFAULT): Define.
	* config/arc/linux.h (TARGET_CODE_DENSITY_FRAME_DEFAULT): Define.
	* config/arc/arc.md (pop_multi_fp_blink): Adjust constraints to
	match what the ops is doing.
	(push_multi_fp_blink): Likewise.
	* config/arc/arc.c (arc_override_options): Enable enter/leave when
	compiling for size and elf target.
	(arc_save_callee_enter): Adjust note to match what enter/leave
	operation does.

From-SVN: r269758

gcc/ChangeLog

 2019-03-18  Claudiu Zissulescu  <claziss@synopsys.com>
 
+	* config/arc/arc.opt (mcode-density-frame): Get the inital value
+	from TARGET_CODE_DENSITY_FRAME_DEFAULT.
+	* config/arc/elf.h (TARGET_CODE_DENSITY_FRAME_DEFAULT): Define.
+	* config/arc/linux.h (TARGET_CODE_DENSITY_FRAME_DEFAULT): Define.
+	* config/arc/arc.md (pop_multi_fp_blink): Adjust constraints to
+	match what the ops is doing.
+	(push_multi_fp_blink): Likewise.
+	* config/arc/arc.c (arc_override_options): Enable enter/leave when
+	compiling for size and elf target.
+	(arc_save_callee_enter): Adjust note to match what enter/leave
+	operation does.
+
+2019-03-18  Claudiu Zissulescu  <claziss@synopsys.com>
+
 	* config/arc/arc.md (tst_movb): Fix constraint.
 
 2019-03-18  Claudiu Zissulescu  <claziss@synopsys.com>

gcc/config/arc/arc.c

@@ -1294,6 +1294,9 @@ arc_override_options (void)
   if (arc_size_opt_level == 3)
     optimize_size = 1;
 
+  if (TARGET_V2 && optimize_size && (ATTRIBUTE_PCS == 2))
+    TARGET_CODE_DENSITY_FRAME = 1;
+
   if (flag_pic)
     target_flags |= MASK_NO_SDATA_SET;
 
@@ -3140,7 +3143,7 @@ arc_save_callee_enter (unsigned int gmask,
   reg = gen_rtx_SET (stack_pointer_rtx,
 		     plus_constant (Pmode,
 				    stack_pointer_rtx,
-				    nregs * UNITS_PER_WORD));
+				    -nregs * UNITS_PER_WORD));
   RTX_FRAME_RELATED_P (reg) = 1;
   XVECEXP (insn, 0, indx++) = reg;
   off = nregs * UNITS_PER_WORD;

gcc/config/arc/arc.md

@@ -6458,7 +6458,8 @@ core_3, archs4x, archs4xd, archs4xd_slow"
 			 (plus:SI (reg:SI SP_REG)
 				  (match_operand 1 "immediate_operand" "")))
 		    (set (mem:SI (plus:SI (reg:SI SP_REG)
-					  (match_dup 1)))
+					  (match_operand 2 "immediate_operand"
+							 "")))
 			 (reg:SI 13))])]
   "TARGET_CODE_DENSITY"
   {
@@ -6466,14 +6467,14 @@ core_3, archs4x, archs4xd, archs4xd_slow"
    rtx tmp = XVECEXP (operands[0], 0, len - 1);
    if (MEM_P (XEXP (tmp, 0)))
      {
-      operands[2] = XEXP (tmp, 1);
-      return "enter_s\\t{r13-%2} ; sp=sp-%1";
+      operands[3] = XEXP (tmp, 1);
+      return "enter_s\\t{r13-%3} ; sp=sp+(%1)";
      }
    else
      {
       tmp = XVECEXP (operands[0], 0, len - 3);
-      operands[2] = XEXP (tmp, 1);
-      return "enter_s\\t{r13-%2, fp} ; sp=sp-%1";
+      operands[3] = XEXP (tmp, 1);
+      return "enter_s\\t{r13-%3, fp} ; sp=sp+(%1)";
      }
   }
   [(set_attr "type" "call_no_delay_slot")
@@ -6485,7 +6486,8 @@ core_3, archs4x, archs4xd, archs4xd_slow"
 			 (plus:SI (reg:SI SP_REG)
 				  (match_operand 1 "immediate_operand" "")))
 		    (set (mem:SI (plus:SI (reg:SI SP_REG)
-					  (match_dup 1)))
+					  (match_operand 2 "immediate_operand"
+							 "")))
 			 (reg:SI RETURN_ADDR_REGNUM))])]
   "TARGET_CODE_DENSITY"
   {
@@ -6493,14 +6495,14 @@ core_3, archs4x, archs4xd, archs4xd_slow"
    rtx tmp = XVECEXP (operands[0], 0, len - 1);
    if (MEM_P (XEXP (tmp, 0)))
      {
-      operands[2] = XEXP (tmp, 1);
-      return "enter_s\\t{r13-%2, blink} ; sp=sp-%1";
+      operands[3] = XEXP (tmp, 1);
+      return "enter_s\\t{r13-%3, blink} ; sp=sp+(%1)";
      }
    else
      {
       tmp = XVECEXP (operands[0], 0, len - 3);
-      operands[2] = XEXP (tmp, 1);
-      return "enter_s\\t{r13-%2, fp, blink} ; sp=sp-%1";
+      operands[3] = XEXP (tmp, 1);
+      return "enter_s\\t{r13-%3, fp, blink} ; sp=sp+(%1)";
      }
   }
   [(set_attr "type" "call_no_delay_slot")

gcc/config/arc/arc.opt

@@ -537,5 +537,5 @@ Target Report Var(TARGET_BRANCH_INDEX) Init(DEFAULT_BRANCH_INDEX)
 Enable use of BI/BIH instructions when available.
 
 mcode-density-frame
-Target Report Var(TARGET_CODE_DENSITY_FRAME)
+Target Report Var(TARGET_CODE_DENSITY_FRAME) Init(TARGET_CODE_DENSITY_FRAME_DEFAULT)
 Enable ENTER_S and LEAVE_S opcodes for ARCv2.

gcc/config/arc/elf.h

@@ -87,3 +87,7 @@ along with GCC; see the file COPYING3.  If not see
     fun = gen_rtx_SYMBOL_REF (Pmode, "__mcount");		\
     emit_library_call (fun, LCT_NORMAL, VOIDmode);		\
   }
+
+/* Enter/Leave default value.  */
+#undef TARGET_CODE_DENSITY_FRAME_DEFAULT
+#define TARGET_CODE_DENSITY_FRAME_DEFAULT 0

gcc/config/arc/linux.h

@@ -133,3 +133,7 @@ along with GCC; see the file COPYING3.  If not see
    fun = gen_rtx_SYMBOL_REF (Pmode, "_mcount");			\
    emit_library_call (fun, LCT_NORMAL, VOIDmode, rt, Pmode);	\
   }
+
+/* Enter/Leave ops are default off for linux targets.  */
+#undef TARGET_CODE_DENSITY_FRAME_DEFAULT
+#define TARGET_CODE_DENSITY_FRAME_DEFAULT 0