i386: Use code_for_ instead of gen_ for parameterized names more.

Some builtins are better expanded to patterns with
parametrized names via code_for_ than gen_ helpers.

No functional changes.

2020-08-19  Uroš Bizjak  <ubizjak@gmail.com>

gcc/ChangeLog:

	* config/i386/i386-expand.c (ix86_expand_builtin)
	[case IX86_BUILTIN_ENQCMD, case IX86_BUILTIN_ENQCMDS]:
	Rewrite expansion to use code_for_enqcmd.
	[case IX86_BUILTIN_WRSSD, case IX86_BUILTIN_WRSSQ]:
	Rewrite expansion to use code_for_wrss.
	[case IX86_BUILTIN_WRUSSD, case IX86_BUILTIN_WRUSSD]:
	Rewrite expansion to use code_for_wrss.

diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index 68fbe83..6161863 100644 (file)
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -11433,24 +11433,24 @@ ix86_expand_builtin (tree exp, rtx target, rtx subtarget,
        }
       else
        {
-         rtx pat;
+         if (target == 0
+             || !register_operand (target, SImode))
+           target = gen_reg_rtx (SImode);
 
-         target = gen_reg_rtx (SImode);
          emit_move_insn (target, const0_rtx);
          target = gen_rtx_SUBREG (QImode, target, 0);
 
-         if (fcode == IX86_BUILTIN_ENQCMD)
-           pat = gen_enqcmd (UNSPECV_ENQCMD, Pmode, op0, op1);
-         else
-           pat = gen_enqcmd (UNSPECV_ENQCMDS, Pmode, op0, op1);
-
-         emit_insn (pat);
-
-         emit_insn (gen_rtx_SET (gen_rtx_STRICT_LOW_PART (VOIDmode, target),
-                                 gen_rtx_fmt_ee (EQ, QImode,
-                                                 SET_DEST (pat),
-                                                 const0_rtx)));
+         int unspecv = (fcode == IX86_BUILTIN_ENQCMD
+                        ? UNSPECV_ENQCMD
+                        : UNSPECV_ENQCMDS);
+         icode = code_for_enqcmd (unspecv, Pmode);
+         emit_insn (GEN_FCN (icode) (op0, op1));
 
+         emit_insn
+           (gen_rtx_SET (gen_rtx_STRICT_LOW_PART (VOIDmode, target),
+                         gen_rtx_fmt_ee (EQ, QImode,
+                                         gen_rtx_REG (CCZmode, FLAGS_REG),
+                                         const0_rtx)));
          return SUBREG_REG (target);
        }
 
@@ -12839,10 +12839,12 @@ rdseed_step:
        }
       op1 = gen_rtx_MEM (mode, op1);
 
-      emit_insn ((fcode == IX86_BUILTIN_WRSSD
-                 || fcode == IX86_BUILTIN_WRSSQ)
-                ? gen_wrss (mode, op0, op1)
-                : gen_wruss (mode, op0, op1));
+      icode = ((fcode == IX86_BUILTIN_WRSSD
+               || fcode == IX86_BUILTIN_WRSSQ)
+              ? code_for_wrss (mode)
+              : code_for_wruss (mode));
+      emit_insn (GEN_FCN (icode) (op0, op1));
+
       return 0;
 
     default: