re PR target/66824 (-miamcu doesn't load FP constant into register directly)

	PR target/66824
	* config/i386/i386.h (TARGET_HARD_SF_REGS): New define.
	(TARGET_HARD_DF_REGS): Ditto.
	(TARGET_HARD_XF_REGS): Ditto.
	* config/i386/i386.md (*movxf_internal): Add alternatives 9 and 10.
	Enable alternatives 9 and 10 only for !TARGET_HARD_XF_REG target.
	(*movdf_internal): Add alternatives 22, 23, 24 and 25. Enable
	alternatives 22, 23, 24 and 25 only for !TARGET_HARD_DF_REG target.
	(*movsf_internal): Add alternatives 16 and 17. Enable
	alternatives 16 and 17 only for !TARGET_HARD_SF_REG target.

From-SVN: r225919

3 files changed, 79 insertions, 29 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index bac556e..2be9c82 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,18 @@
 2015-07-17  Uros Bizjak  <ubizjak@gmail.com>
 
+	PR target/66824
+	* config/i386/i386.h (TARGET_HARD_SF_REGS): New define.
+	(TARGET_HARD_DF_REGS): Ditto.
+	(TARGET_HARD_XF_REGS): Ditto.
+	* config/i386/i386.md (*movxf_internal): Add alternatives 9 and 10.
+	Enable alternatives 9 and 10 only for !TARGET_HARD_XF_REG target.
+	(*movdf_internal): Add alternatives 22, 23, 24 and 25. Enable
+	alternatives 22, 23, 24 and 25 only for !TARGET_HARD_DF_REG target.
+	(*movsf_internal): Add alternatives 16 and 17. Enable
+	alternatives 16 and 17 only for !TARGET_HARD_SF_REG target.
+
+2015-07-17  Uros Bizjak  <ubizjak@gmail.com>
+
 	PR rtl-optimization/66891
 	* calls.c (expand_call): Wrap precompute_register_parameters with
 	NO_DEFER_POP/OK_DEFER_POP to prevent deferred pops.
@@ -447,29 +460,29 @@
 2015-07-15  Aditya Kumar  <aditya.k7@samsung.com>
 	    Sebastian Pop  <s.pop@samsung.com>
 
-        * graphite-sese-to-poly.c (rewrite_cross_bb_scalar_deps): Point
+	* graphite-sese-to-poly.c (rewrite_cross_bb_scalar_deps): Point
 	iterator to use_stmt.
 
 2015-07-15  Aditya Kumar  <aditya.k7@samsung.com>
 	    Sebastian Pop <s.pop@samsung.com>
 
-        * graphite-scop-detection.c (build_scops_1): Discard scops for
+	* graphite-scop-detection.c (build_scops_1): Discard scops for
 	which entry==exit.
 
 2015-07-15  Aditya Kumar  <aditya.k7@samsung.com>
-            Sebastian Pop <s.pop@samsung.com>
+	    Sebastian Pop <s.pop@samsung.com>
 
-        * graphite-scop-detection.c (stmt_simple_for_scop_p): Bail out in
+	* graphite-scop-detection.c (stmt_simple_for_scop_p): Bail out in
 	case of a return statement in scop.
 
 2015-07-15  Aditya Kumar  <aditya.k7@samsung.com>
 	    Sebastian Pop <s.pop@samsung.com>
 
-        * graphite-sese-to-poly.c (parameter_index_in_region): Only handle
+	* graphite-sese-to-poly.c (parameter_index_in_region): Only handle
 	INTEGER_TYPE parameters.
-        (scan_tree_for_params): Handle REAL_CST, COMPLEX_CST, and
+	(scan_tree_for_params): Handle REAL_CST, COMPLEX_CST, and
 	VECTOR_CST in scan_tree_for_params.
-        (add_conditions_to_domain): Only constrain on INTEGER_TYPE.
+	(add_conditions_to_domain): Only constrain on INTEGER_TYPE.
 
 2015-07-15  Andrew MacLeod  <amacleod@redhat.com>
 
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 0fcf391d..ab668fe 100644
--- a/gcc/config/i386/i386.h
+++ b/gcc/config/i386/i386.h
@@ -524,6 +524,10 @@ extern unsigned char x86_prefetch_sse;
 #define TARGET_MIX_SSE_I387 \
  ((ix86_fpmath & (FPMATH_SSE | FPMATH_387)) == (FPMATH_SSE | FPMATH_387))
 
+#define TARGET_HARD_SF_REGS	(TARGET_80387 || TARGET_MMX || TARGET_SSE)
+#define TARGET_HARD_DF_REGS	(TARGET_80387 || TARGET_SSE)
+#define TARGET_HARD_XF_REGS	(TARGET_80387)
+
 #define TARGET_GNU_TLS		(ix86_tls_dialect == TLS_DIALECT_GNU)
 #define TARGET_GNU2_TLS		(ix86_tls_dialect == TLS_DIALECT_GNU2)
 #define TARGET_ANY_GNU_TLS	(TARGET_GNU_TLS || TARGET_GNU2_TLS)
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 2b3b6e9..ea98a36 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -3087,9 +3087,9 @@
 ;; in alternatives 4, 6, 7 and 8.
 (define_insn "*movxf_internal"
   [(set (match_operand:XF 0 "nonimmediate_operand"
-	 "=f,m,f,?r ,!o,?*r ,!o,!o,!o")
+	 "=f,m,f,?r ,!o,?*r ,!o,!o,!o,r  ,o")
 	(match_operand:XF 1 "general_operand"
-	 "fm,f,G,roF,r , *roF,*r,F ,C"))]
+	 "fm,f,G,roF,r , *roF,*r,F ,C,roF,rF"))]
   "!(MEM_P (operands[0]) && MEM_P (operands[1]))
    && (!can_create_pseudo_p ()
        || (ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_LARGE)
@@ -3098,7 +3098,8 @@
 	   && standard_80387_constant_p (operands[1]) > 0
 	   && !memory_operand (operands[0], XFmode))
        || (!TARGET_MEMORY_MISMATCH_STALL
-	   && memory_operand (operands[0], XFmode)))"
+	   && memory_operand (operands[0], XFmode))
+       || !TARGET_HARD_XF_REGS)"
 {
   switch (get_attr_type (insn))
     {
@@ -3122,12 +3123,12 @@
 	      ]
 	      (const_string "*")))
    (set (attr "type")
-	(cond [(eq_attr "alternative" "3,4,5,6,7,8")
+	(cond [(eq_attr "alternative" "3,4,5,6,7,8,9,10")
 		 (const_string "multi")
 	      ]
 	      (const_string "fmov")))
    (set (attr "mode")
-	(cond [(eq_attr "alternative" "3,4,5,6,7,8")
+	(cond [(eq_attr "alternative" "3,4,5,6,7,8,9,10")
 		 (if_then_else (match_test "TARGET_64BIT")
 		   (const_string "DI")
 		   (const_string "SI"))
@@ -3136,14 +3137,24 @@
    (set (attr "preferred_for_size")
      (cond [(eq_attr "alternative" "3,4")
               (symbol_ref "false")]
-           (symbol_ref "true")))])
+           (symbol_ref "true")))
+   (set (attr "enabled")
+     (cond [(eq_attr "alternative" "9,10")
+              (if_then_else
+		(match_test "TARGET_HARD_XF_REGS")
+		(symbol_ref "false")
+		(const_string "*"))
+            (not (match_test "TARGET_HARD_XF_REGS"))
+	      (symbol_ref "false")
+	   ]
+	   (const_string "*")))])
    
 ;; Possible store forwarding (partial memory) stall in alternatives 4, 6 and 7.
 (define_insn "*movdf_internal"
   [(set (match_operand:DF 0 "nonimmediate_operand"
-    "=Yf*f,m   ,Yf*f,?r ,!o,?*r ,!o,!o,?r,?m,?r,?r,v,v,v,m,*x,*x,*x,m ,r ,Yi")
+    "=Yf*f,m   ,Yf*f,?r ,!o,?*r ,!o,!o,?r,?m,?r,?r,v,v,v,m,*x,*x,*x,m ,r ,Yi,r  ,o ,r  ,m")
 	(match_operand:DF 1 "general_operand"
-    "Yf*fm,Yf*f,G   ,roF,r ,*roF,*r,F ,rm,rC,C ,F ,C,v,m,v,C ,*x,m ,*x,Yj,r"))]
+    "Yf*fm,Yf*f,G   ,roF,r ,*roF,*r,F ,rm,rC,C ,F ,C,v,m,v,C ,*x,m ,*x,Yj,r ,roF,rF,rmF,rC"))]
   "!(MEM_P (operands[0]) && MEM_P (operands[1]))
    && (!can_create_pseudo_p ()
        || (ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_LARGE)
@@ -3155,7 +3166,8 @@
 		   && standard_sse_constant_p (operands[1])))
 	   && !memory_operand (operands[0], DFmode))
        || ((TARGET_64BIT || !TARGET_MEMORY_MISMATCH_STALL)
-	   && memory_operand (operands[0], DFmode)))"
+	   && memory_operand (operands[0], DFmode))
+       || !TARGET_HARD_DF_REGS)"
 {
   switch (get_attr_type (insn))
     {
@@ -3216,9 +3228,9 @@
     }
 }
   [(set (attr "isa")
-	(cond [(eq_attr "alternative" "3,4,5,6,7")
+	(cond [(eq_attr "alternative" "3,4,5,6,7,22,23")
 		 (const_string "nox64")
-	       (eq_attr "alternative" "8,9,10,11,20,21")
+	       (eq_attr "alternative" "8,9,10,11,20,21,24,25")
 		 (const_string "x64")
 	       (eq_attr "alternative" "12,13,14,15")
 		 (const_string "sse2")
@@ -3227,9 +3239,9 @@
    (set (attr "type")
 	(cond [(eq_attr "alternative" "0,1,2")
 		 (const_string "fmov")
-	       (eq_attr "alternative" "3,4,5,6,7")
+	       (eq_attr "alternative" "3,4,5,6,7,22,23")
 		 (const_string "multi")
-	       (eq_attr "alternative" "8,9,10,11")
+	       (eq_attr "alternative" "8,9,10,11,24,25")
 		 (const_string "imov")
 	       (eq_attr "alternative" "12,16")
 		 (const_string "sselog1")
@@ -3254,9 +3266,9 @@
        (const_string "1")
        (const_string "*")))
    (set (attr "mode")
-	(cond [(eq_attr "alternative" "3,4,5,6,7,10")
+	(cond [(eq_attr "alternative" "3,4,5,6,7,10,22,23")
 		 (const_string "SI")
-	       (eq_attr "alternative" "8,9,11,20,21")
+	       (eq_attr "alternative" "8,9,11,20,21,24,25")
 		 (const_string "DI")
 
 	       /* xorps is one byte shorter for non-AVX targets.  */
@@ -3320,13 +3332,23 @@
    (set (attr "preferred_for_speed")
      (cond [(eq_attr "alternative" "3,4")
               (symbol_ref "TARGET_INTEGER_DFMODE_MOVES")]
-           (symbol_ref "true")))])
+           (symbol_ref "true")))
+   (set (attr "enabled")
+     (cond [(eq_attr "alternative" "22,23,24,25")
+              (if_then_else
+		(match_test "TARGET_HARD_DF_REGS")
+		(symbol_ref "false")
+		(const_string "*"))
+            (not (match_test "TARGET_HARD_DF_REGS"))
+	      (symbol_ref "false")
+	   ]
+	   (const_string "*")))])
 
 (define_insn "*movsf_internal"
   [(set (match_operand:SF 0 "nonimmediate_operand"
-	  "=Yf*f,m   ,Yf*f,?r ,?m,v,v,v,m,?r,?Yi,!*y,!*y,!m,!r ,!*Ym")
+	  "=Yf*f,m   ,Yf*f,?r ,?m,v,v,v,m,?r,?Yi,!*y,!*y,!m,!r ,!*Ym,r  ,m")
 	(match_operand:SF 1 "general_operand"
-	  "Yf*fm,Yf*f,G   ,rmF,rF,C,v,m,v,Yj,r  ,*y ,m  ,*y,*Yn,r"))]
+	  "Yf*fm,Yf*f,G   ,rmF,rF,C,v,m,v,Yj,r  ,*y ,m  ,*y,*Yn,r   ,rmF,rF"))]
   "!(MEM_P (operands[0]) && MEM_P (operands[1]))
    && (!can_create_pseudo_p ()
        || (ix86_cmodel == CM_MEDIUM || ix86_cmodel == CM_LARGE)
@@ -3336,7 +3358,8 @@
 		&& standard_80387_constant_p (operands[1]) > 0)
 	       || (TARGET_SSE_MATH
 		   && standard_sse_constant_p (operands[1]))))
-       || memory_operand (operands[0], SFmode))"
+       || memory_operand (operands[0], SFmode)
+       || !TARGET_HARD_SF_REGS)"
 {
   switch (get_attr_type (insn))
     {
@@ -3390,7 +3413,7 @@
   [(set (attr "type")
 	(cond [(eq_attr "alternative" "0,1,2")
 		 (const_string "fmov")
-	       (eq_attr "alternative" "3,4")
+	       (eq_attr "alternative" "3,4,16,17")
 		 (const_string "imov")
 	       (eq_attr "alternative" "5")
 		 (const_string "sselog1")
@@ -3407,7 +3430,7 @@
        (const_string "1")
        (const_string "*")))
    (set (attr "mode")
-        (cond [(eq_attr "alternative" "3,4,9,10,12,13,14,15")
+        (cond [(eq_attr "alternative" "3,4,9,10,12,13,14,15,16,17")
 		 (const_string "SI")
 	       (eq_attr "alternative" "11")
 		 (const_string "DI")
@@ -3445,7 +3468,17 @@
 		       ]
 		       (const_string "SF"))
 	      ]
-	      (const_string "SF")))])
+	      (const_string "SF")))
+   (set (attr "enabled")
+     (cond [(eq_attr "alternative" "16,17")
+              (if_then_else
+		(match_test "TARGET_HARD_SF_REGS")
+		(symbol_ref "false")
+		(const_string "*"))
+            (not (match_test "TARGET_HARD_SF_REGS"))
+	      (symbol_ref "false")
+	   ]
+	   (const_string "*")))])
 
 (define_split
   [(set (match_operand 0 "any_fp_register_operand")