Replace match.pd DEFINE_MATH_FNs with auto-generated lists

[Richard Sandiford <richard.sandiford@arm.com>]

This patch autogenerates the operator lists for maths functions
like SQRT, adding an additional entry for internal functions.
E.g.:

    (define_operator_list SQRT
        BUILT_IN_SQRTF
        BUILT_IN_SQRT
        BUILT_IN_SQRTL
        IFN_SQRT)

and:

    (define_operator_list CABS
        BUILT_IN_CABSF
        BUILT_IN_CABS
        BUILT_IN_CABSL
        null)

(since there's no internal function for CABS).

Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.
OK to install?

Thanks,
Richard


gcc/
	* Makefile.in (MOSTLYCLEANFILES): Add cfn-operators.pd.
	(generated_files): Likewise.
	(s-cfn-operators, cfn-operators.pd): New rules.
	(s-match): Depend on cfn-operators.pd.
	* gencfn-macros.c: Expand comment to describe -o behavior.
	(print_define_operator_list): New function.
	(main): Accept -o.  Call print_define_operator_list.
	* genmatch.c (main): Add "." to the include path.
	* match.pd (DEFINE_MATH_FN): Delete.  Include cfn-operators.pd
	instead.

diff --git a/gcc/Makefile.in b/gcc/Makefile.in
index 298bb38..a21aaf5 100644
--- a/gcc/Makefile.in
+++ b/gcc/Makefile.in
@@ -1566,7 +1566,7 @@ MOSTLYCLEANFILES = insn-flags.h insn-config.h insn-codes.h \
  tm-preds.h tm-constrs.h checksum-options gimple-match.c generic-match.c \
  tree-check.h min-insn-modes.c insn-modes.c insn-modes.h \
  genrtl.h gt-*.h gtype-*.h gtype-desc.c gtyp-input.list \
- case-cfn-macros.h \
+ case-cfn-macros.h cfn-operators.pd \
  xgcc$(exeext) cpp$(exeext) $(FULL_DRIVER_NAME) \
  $(EXTRA_PROGRAMS) gcc-cross$(exeext) \
  $(SPECS) collect2$(exeext) gcc-ar$(exeext) gcc-nm$(exeext) \
@@ -2252,6 +2252,14 @@ s-case-cfn-macros: build/gencfn-macros$(build_exeext)
 	$(STAMP) s-case-cfn-macros
 case-cfn-macros.h: s-case-cfn-macros; @true
 
+s-cfn-operators: build/gencfn-macros$(build_exeext)
+	$(RUN_GEN) build/gencfn-macros$(build_exeext) -o \
+	  > tmp-cfn-operators.pd
+	$(SHELL) $(srcdir)/../move-if-change tmp-cfn-operators.pd \
+	  cfn-operators.pd
+	$(STAMP) s-cfn-operators
+cfn-operators.pd: s-cfn-operators; @true
+
 target-hooks-def.h: s-target-hooks-def-h; @true
 # make sure that when we build info files, the used tm.texi is up to date.
 $(srcdir)/doc/tm.texi: s-tm-texi; @true
@@ -2318,7 +2326,7 @@ s-tm-texi: build/genhooks$(build_exeext) $(srcdir)/doc/tm.texi.in
 gimple-match.c: s-match gimple-match-head.c ; @true
 generic-match.c: s-match generic-match-head.c ; @true
 
-s-match: build/genmatch$(build_exeext) $(srcdir)/match.pd
+s-match: build/genmatch$(build_exeext) $(srcdir)/match.pd cfn-operators.pd
 	$(RUN_GEN) build/genmatch$(build_exeext) --gimple $(srcdir)/match.pd \
 	    > tmp-gimple-match.c
 	$(RUN_GEN) build/genmatch$(build_exeext) --generic $(srcdir)/match.pd \
@@ -2439,7 +2447,8 @@ generated_files = config.h tm.h $(TM_P_H) $(TM_H) multilib.h \
        $(ALL_GTFILES_H) gtype-desc.c gtype-desc.h gcov-iov.h \
        options.h target-hooks-def.h insn-opinit.h \
        common/common-target-hooks-def.h pass-instances.def \
-       c-family/c-target-hooks-def.h params.list case-cfn-macros.h
+       c-family/c-target-hooks-def.h params.list case-cfn-macros.h \
+       cfn-operators.pd
 
 #\f
 # How to compile object files to run on the build machine.
diff --git a/gcc/gencfn-macros.c b/gcc/gencfn-macros.c
index 5ee3af0..401c429 100644
--- a/gcc/gencfn-macros.c
+++ b/gcc/gencfn-macros.c
@@ -40,7 +40,27 @@ along with GCC; see the file COPYING3.  If not see
       case CFN_BUILT_IN_SQRTL:
       case CFN_SQRT:
 
-   The macros for groups with no internal function drop the last line.  */
+   The macros for groups with no internal function drop the last line.
+
+   When run with -o, the generator prints a similar list of
+   define_operator_list directives, for use by match.pd.  Each operator
+   list starts with the built-in functions, in order of ascending type width.
+   This is followed by an entry for the internal function, or "null" if there
+   is no internal function for the group.  For example:
+
+     (define_operator_list SQRT
+	 BUILT_IN_SQRTF
+	 BUILT_IN_SQRT
+	 BUILT_IN_SQRTL
+	 IFN_SQRT)
+
+   and:
+
+     (define_operator_list CABS
+	 BUILT_IN_CABSF
+	 BUILT_IN_CABS
+	 BUILT_IN_CABSL
+	 null)  */
 
 #include "bconfig.h"
 #include "system.h"
@@ -89,6 +109,23 @@ print_case_cfn (const char *name, bool internal_p,
   printf ("\n");
 }
 
+/* Print an operator list for all combined functions related to NAME,
+   with the null-terminated list of suffixes in SUFFIXES.  INTERNAL_P
+   says whether CFN_<NAME> also exists.  */
+
+static void
+print_define_operator_list (const char *name, bool internal_p,
+			    const char *const *suffixes)
+{
+  printf ("(define_operator_list %s\n", name);
+  for (unsigned int i = 0; suffixes[i]; ++i)
+    printf ("    BUILT_IN_%s%s\n", name, suffixes[i]);
+  if (internal_p)
+    printf ("    IFN_%s)\n", name);
+  else
+    printf ("    null)\n");
+}
+
 const char *const builtin_names[] = {
 #define DEF_BUILTIN(ENUM, N, C, T, LT, B, F, NA, AT, IM, COND) \
   #ENUM,
@@ -126,9 +163,10 @@ main (int argc, char **argv)
   progname = argv[0];
   if (argc != 2
       || argv[1][0] != '-'
-      || argv[1][1] != 'c'
+      || !strchr ("co", argv[1][1])
       || argv[1][2])
-    fatal ("usage: %s -c > file", progname);
+    fatal ("usage: %s [-c|-o] > file", progname);
+  int type = argv[1][1];
 
   /* Collect the set of built-in and internal functions.  */
   string_set builtins;
@@ -165,7 +203,11 @@ main (int argc, char **argv)
 	    if (is_group (&builtins, root, suffix_lists[j]))
 	      {
 		bool internal_p = internal_fns.contains (root);
-		print_case_cfn (root, internal_p, suffix_lists[j]);
+		if (type == 'c')
+		  print_case_cfn (root, internal_p, suffix_lists[j]);
+		else
+		  print_define_operator_list (root, internal_p,
+					      suffix_lists[j]);
 	      }
 	}
     }
diff --git a/gcc/genmatch.c b/gcc/genmatch.c
index cff32b0..7139476 100644
--- a/gcc/genmatch.c
+++ b/gcc/genmatch.c
@@ -4638,6 +4638,11 @@ main (int argc, char **argv)
   cpp_callbacks *cb = cpp_get_callbacks (r);
   cb->error = error_cb;
 
+  /* Add the build directory to the #include "" search path.  */
+  cpp_dir *dir = XCNEW (cpp_dir);
+  dir->name = ASTRDUP (".");
+  cpp_set_include_chains (r, dir, NULL, false);
+
   if (!cpp_read_main_file (r, input))
     return 1;
   cpp_define (r, gimple ? "GIMPLE=1": "GENERIC=1");
diff --git a/gcc/match.pd b/gcc/match.pd
index e8ccb85..1f9de49 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -47,10 +47,7 @@ along with GCC; see the file COPYING3.  If not see
 (define_operator_list simple_comparison         lt   le   eq ne ge   gt)
 (define_operator_list swapped_simple_comparison gt   ge   eq ne le   lt)
 
-/* Define an operand list for math function FN, with float, double and
-   long double variants (in that order).  */
-#define DEFINE_MATH_FN(FN) \
-  (define_operator_list FN BUILT_IN_##FN##F BUILT_IN_##FN BUILT_IN_##FN##L)
+#include "cfn-operators.pd"
 
 /* Define operand lists for math rounding functions {,i,l,ll}FN,
    where the versions prefixed with "i" return an int, those prefixed with
@@ -62,10 +59,6 @@ along with GCC; see the file COPYING3.  If not see
      X<FN> for all double functions, in the same order
      X<FN>L for all long double functions, in the same order.  */
 #define DEFINE_INT_AND_FLOAT_ROUND_FN(FN) \
-  DEFINE_MATH_FN (FN) \
-  DEFINE_MATH_FN (I##FN) \
-  DEFINE_MATH_FN (L##FN) \
-  DEFINE_MATH_FN (LL##FN) \
   (define_operator_list X##FN##F BUILT_IN_I##FN##F \
 				 BUILT_IN_L##FN##F \
 				 BUILT_IN_LL##FN##F) \
@@ -76,39 +69,6 @@ along with GCC; see the file COPYING3.  If not see
 				 BUILT_IN_L##FN##L \
 				 BUILT_IN_LL##FN##L)
 
-DEFINE_MATH_FN (LOG)
-DEFINE_MATH_FN (EXP)
-DEFINE_MATH_FN (LOG2)
-DEFINE_MATH_FN (EXP2)
-DEFINE_MATH_FN (LOG10)
-DEFINE_MATH_FN (EXP10)
-DEFINE_MATH_FN (POW)
-DEFINE_MATH_FN (POW10)
-DEFINE_MATH_FN (POWI)
-DEFINE_MATH_FN (SQRT)
-DEFINE_MATH_FN (CBRT)
-DEFINE_MATH_FN (SIN)
-DEFINE_MATH_FN (COS)
-DEFINE_MATH_FN (TAN)
-DEFINE_MATH_FN (ATAN)
-DEFINE_MATH_FN (COSH)
-DEFINE_MATH_FN (CEXP)
-DEFINE_MATH_FN (CEXPI)
-DEFINE_MATH_FN (CPROJ)
-DEFINE_MATH_FN (CCOS)
-DEFINE_MATH_FN (CCOSH)
-DEFINE_MATH_FN (HYPOT)
-DEFINE_MATH_FN (COPYSIGN)
-DEFINE_MATH_FN (CABS)
-DEFINE_MATH_FN (TRUNC)
-DEFINE_MATH_FN (NEARBYINT)
-DEFINE_MATH_FN (SIGNBIT)
-DEFINE_MATH_FN (FMIN)
-DEFINE_MATH_FN (FMAX)
-DEFINE_MATH_FN (LDEXP)
-DEFINE_MATH_FN (SCALBN)
-DEFINE_MATH_FN (SCALBLN)
-
 DEFINE_INT_AND_FLOAT_ROUND_FN (FLOOR)
 DEFINE_INT_AND_FLOAT_ROUND_FN (CEIL)
 DEFINE_INT_AND_FLOAT_ROUND_FN (ROUND)