re PR target/88461 (AVX512: gcc should keep value in kN registers if possible)

	PR target/88461
	* config/i386/i386.md (*zero_extendsidi2, zero_extend<mode>di2,
	*zero_extend<mode>si2, *zero_extendqihi2): Add =*k, *km alternatives.

From-SVN: r267076

gcc/ChangeLog

+2018-12-13  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/88461
+	* config/i386/i386.md (*zero_extendsidi2, zero_extend<mode>di2,
+	*zero_extend<mode>si2, *zero_extendqihi2): Add =*k, *km alternatives.
+
 2018-12-12  Tom de Vries  <tdevries@suse.de>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/config/i386/i386.md

@@ -3751,10 +3751,10 @@
 
 (define_insn "*zero_extendsidi2"
   [(set (match_operand:DI 0 "nonimmediate_operand"
-		"=r,?r,?o,r   ,o,?*y,?!*y,$r,$v,$x,*x,*v,*r")
+		"=r,?r,?o,r   ,o,?*y,?!*y,$r,$v,$x,*x,*v,*r,*k")
 	(zero_extend:DI
 	 (match_operand:SI 1 "x86_64_zext_operand"
-	        "0 ,rm,r ,rmWz,0,r  ,m   ,v ,r ,m ,*x,*v,*k")))]
+	        "0 ,rm,r ,rmWz,0,r  ,m   ,v ,r ,m ,*x,*v,*k,*km")))]
   ""
 {
   switch (get_attr_type (insn))
@@ -3806,6 +3806,8 @@
 	      (const_string "avx512f")
 	    (eq_attr "alternative" "12")
 	      (const_string "x64_avx512bw")
+	    (eq_attr "alternative" "13")
+	      (const_string "avx512bw")
 	   ]
 	   (const_string "*")))
    (set (attr "type")
@@ -3819,7 +3821,7 @@
 		(const_string "multi"))
 	    (eq_attr "alternative" "8,9,10,11")
 	      (const_string "ssemov")
-	    (eq_attr "alternative" "12")
+	    (eq_attr "alternative" "12,13")
 	      (const_string "mskmov")
 	   ]
 	   (const_string "imovx")))
@@ -3881,16 +3883,17 @@
   [(QI "avx512dq") (HI "avx512f") (SI "avx512bw") (DI "avx512bw")])
 
 (define_insn "zero_extend<mode>di2"
-  [(set (match_operand:DI 0 "register_operand" "=r,*r")
+  [(set (match_operand:DI 0 "register_operand" "=r,*r,*k")
 	(zero_extend:DI
-	 (match_operand:SWI12 1 "nonimmediate_operand" "<r>m,*k")))]
+	 (match_operand:SWI12 1 "nonimmediate_operand" "<r>m,*k,*km")))]
   "TARGET_64BIT"
   "@
    movz{<imodesuffix>l|x}\t{%1, %k0|%k0, %1}
+   kmov<mskmodesuffix>\t{%1, %k0|%k0, %1}
    kmov<mskmodesuffix>\t{%1, %k0|%k0, %1}"
-  [(set_attr "isa" "*,<kmov_isa>")
-   (set_attr "type" "imovx,mskmov")
-   (set_attr "mode" "SI,<MODE>")])
+  [(set_attr "isa" "*,<kmov_isa>,<kmov_isa>")
+   (set_attr "type" "imovx,mskmov,mskmov")
+   (set_attr "mode" "SI,<MODE>,<MODE>")])
 
 (define_expand "zero_extend<mode>si2"
   [(set (match_operand:SI 0 "register_operand")
@@ -3933,16 +3936,17 @@
    (set_attr "mode" "SI")])
 
 (define_insn "*zero_extend<mode>si2"
-  [(set (match_operand:SI 0 "register_operand" "=r,*r")
+  [(set (match_operand:SI 0 "register_operand" "=r,*r,*k")
 	(zero_extend:SI
-	  (match_operand:SWI12 1 "nonimmediate_operand" "<r>m,*k")))]
+	  (match_operand:SWI12 1 "nonimmediate_operand" "<r>m,*k,*km")))]
   "!(TARGET_ZERO_EXTEND_WITH_AND && optimize_function_for_speed_p (cfun))"
   "@
    movz{<imodesuffix>l|x}\t{%1, %0|%0, %1}
+   kmov<mskmodesuffix>\t{%1, %0|%0, %1}
    kmov<mskmodesuffix>\t{%1, %0|%0, %1}"
-  [(set_attr "isa" "*,<kmov_isa>")
-   (set_attr "type" "imovx,mskmov")
-   (set_attr "mode" "SI,<MODE>")])
+  [(set_attr "isa" "*,<kmov_isa>,<kmov_isa>")
+   (set_attr "type" "imovx,mskmov,mskmov")
+   (set_attr "mode" "SI,<MODE>,<MODE>")])
 
 (define_expand "zero_extendqihi2"
   [(set (match_operand:HI 0 "register_operand")
@@ -3985,15 +3989,16 @@
 
 ; zero extend to SImode to avoid partial register stalls
 (define_insn "*zero_extendqihi2"
-  [(set (match_operand:HI 0 "register_operand" "=r,*r")
-	(zero_extend:HI (match_operand:QI 1 "nonimmediate_operand" "qm,*k")))]
+  [(set (match_operand:HI 0 "register_operand" "=r,*r,*k")
+	(zero_extend:HI (match_operand:QI 1 "nonimmediate_operand" "qm,*k,*km")))]
   "!(TARGET_ZERO_EXTEND_WITH_AND && optimize_function_for_speed_p (cfun))"
   "@
    movz{bl|x}\t{%1, %k0|%k0, %1}
-   kmovb\t{%1, %k0|%k0, %1}"
-  [(set_attr "isa" "*,avx512dq")
-   (set_attr "type" "imovx,mskmov")
-   (set_attr "mode" "SI,QI")])
+   kmovb\t{%1, %k0|%k0, %1}
+   kmovb\t{%1, %0|%0, %1}"
+  [(set_attr "isa" "*,avx512dq,avx512dq")
+   (set_attr "type" "imovx,mskmov,mskmov")
+   (set_attr "mode" "SI,QI,QI")])
 
 (define_insn_and_split "*zext<mode>_doubleword_and"
   [(set (match_operand:DI 0 "register_operand" "=&<r>")