options: Save and restore opts_set for Optimization and Target options fallout

> This breaks ia64:
>
> In file included from ./tm.h:23,
>                  from ../../gcc/gencheck.c:23:
> ./options.h:7816:40: error: ISO C++ forbids zero-size array 'explicit_mask' [-Werror=pedantic]
>  7816 |   unsigned HOST_WIDE_INT explicit_mask[0];
>       |                                        ^
> ./options.h:7816:26: error: zero-size array member 'cl_target_option::explicit_mask' not at end of 'struct cl_target_option' [-Werror=pedantic]
>  7816 |   unsigned HOST_WIDE_INT explicit_mask[0];
>       |                          ^~~~~~~~~~~~~
> ./options.h:7812:16: note: in the definition of 'struct cl_target_option'
>  7812 | struct GTY(()) cl_target_option
>       |                ^~~~~~~~~~~~~~~~

Oops, sorry.

The following patch should fix that and should also fix streaming of the
new explicit_mask_* members.

2020-10-05  Jakub Jelinek  <jakub@redhat.com>

	* opth-gen.awk: Don't emit explicit_mask array if n_target_explicit
	is equal to n_target_explicit_mask.
	* optc-save-gen.awk: Compute has_target_explicit_mask and if false,
	don't emit code iterating over explicit_mask array elements.  Stream
	also explicit_mask_* target members.

2 files changed, 49 insertions, 10 deletions

diff --git a/gcc/optc-save-gen.awk b/gcc/optc-save-gen.awk
index 56a5df3..5169acd 100644
--- a/gcc/optc-save-gen.awk
+++ b/gcc/optc-save-gen.awk
@@ -689,6 +689,10 @@ for (i = 0; i < n_target_string; i++) {
 if (j != 0) {
 	print "  ptr->explicit_mask[" k "] = mask;";
 }
+has_target_explicit_mask = 0;
+if (j != 0 || k != 0) {
+	has_target_explicit_mask = 1;
+}
 
 print "}";
 
@@ -1075,9 +1079,11 @@ for (i = 0; i < n_target_val; i++) {
 	print "    return false;";
 }
 
-print "  for (size_t i = 0; i < sizeof (ptr1->explicit_mask) / sizeof (ptr1->explicit_mask[0]); i++)";
-print "    if (ptr1->explicit_mask[i] != ptr2->explicit_mask[i])";
-print "      return false;"
+if (has_target_explicit_mask) {
+	print "  for (size_t i = 0; i < sizeof (ptr1->explicit_mask) / sizeof (ptr1->explicit_mask[0]); i++)";
+	print "    if (ptr1->explicit_mask[i] != ptr2->explicit_mask[i])";
+	print "      return false;"
+}
 
 for (i = 0; i < n_target_other; i++) {
 	if (var_target_other[i] in var_target_explicit_mask) {
@@ -1121,8 +1127,10 @@ for (i = 0; i < n_target_val; i++) {
 	name = var_target_val[i]
 	print "  hstate.add_hwi (ptr->" name");";
 }
-print "  for (size_t i = 0; i < sizeof (ptr->explicit_mask) / sizeof (ptr->explicit_mask[0]); i++)";
-print "    hstate.add_hwi (ptr->explicit_mask[i]);";
+if (has_target_explicit_mask) {
+	print "  for (size_t i = 0; i < sizeof (ptr->explicit_mask) / sizeof (ptr->explicit_mask[0]); i++)";
+	print "    hstate.add_hwi (ptr->explicit_mask[i]);";
+}
 
 for (i = 0; i < n_target_other; i++) {
 	if (var_target_other[i] in var_target_explicit_mask)
@@ -1159,8 +1167,22 @@ for (i = 0; i < n_target_val; i++) {
 	print "  bp_pack_value (bp, ptr->" name", 64);";
 }
 
-print "  for (size_t i = 0; i < sizeof (ptr->explicit_mask) / sizeof (ptr->explicit_mask[0]); i++)";
-print "    bp_pack_value (bp, ptr->explicit_mask[i], 64);";
+if (has_target_explicit_mask) {
+	print "  for (size_t i = 0; i < sizeof (ptr->explicit_mask) / sizeof (ptr->explicit_mask[0]); i++)";
+	print "    bp_pack_value (bp, ptr->explicit_mask[i], 64);";
+}
+
+for (i = 0; i < n_target_other; i++) {
+	if (var_target_other[i] in var_target_explicit_mask) {
+		print "  bp_pack_value (bp, ptr->explicit_mask_" var_target_other[i] ", 64);";
+	}
+}
+
+for (i = 0; i < n_target_int; i++) {
+	if (var_target_int[i] in var_target_explicit_mask) {
+		print "  bp_pack_value (bp, ptr->explicit_mask_" var_target_int[i] ", 64);";
+	}
+}
 
 print "}";
 
@@ -1188,8 +1210,22 @@ for (i = 0; i < n_target_val; i++) {
 	print "  ptr->" name" = (" var_target_val_type[i] ") bp_unpack_value (bp, 64);";
 }
 
-print "  for (size_t i = 0; i < sizeof (ptr->explicit_mask) / sizeof (ptr->explicit_mask[0]); i++)";
-print "    ptr->explicit_mask[i] = bp_unpack_value (bp, 64);";
+if (has_target_explicit_mask) {
+	print "  for (size_t i = 0; i < sizeof (ptr->explicit_mask) / sizeof (ptr->explicit_mask[0]); i++)";
+	print "    ptr->explicit_mask[i] = bp_unpack_value (bp, 64);";
+}
+
+for (i = 0; i < n_target_other; i++) {
+	if (var_target_other[i] in var_target_explicit_mask) {
+		print "  ptr->explicit_mask_" var_target_other[i] " = bp_unpack_value (bp, 64);";
+	}
+}
+
+for (i = 0; i < n_target_int; i++) {
+	if (var_target_int[i] in var_target_explicit_mask) {
+		print "  ptr->explicit_mask_" var_target_int[i] " = bp_unpack_value (bp, 64);";
+	}
+}
 
 print "}";
 
diff --git a/gcc/opth-gen.awk b/gcc/opth-gen.awk
index a1ca579..a456b51 100644
--- a/gcc/opth-gen.awk
+++ b/gcc/opth-gen.awk
@@ -291,7 +291,10 @@ for (i = 0; i < n_target_char; i++) {
 }
 
 print "  /* " n_target_explicit - n_target_explicit_mask " members */";
-print "  unsigned HOST_WIDE_INT explicit_mask[" int ((n_target_explicit - n_target_explicit_mask + 63) / 64) "];";
+if (n_target_explicit > n_target_explicit_mask) {
+	print "  unsigned HOST_WIDE_INT explicit_mask[" \
+	  int ((n_target_explicit - n_target_explicit_mask + 63) / 64) "];";
+}
 
 for (i = 0; i < n_target_explicit_mask; i++) {
 	print "  " var_target_explicit_mask[i] ";";