[gcc r11-3692] options: Avoid unused variable mask warning [PR97305]

[Jakub Jelinek <jakub@gcc.gnu.org>]

https://gcc.gnu.org/g:e91c34262d2dd06da4b9436744bff89007dee2c9

commit r11-3692-ge91c34262d2dd06da4b9436744bff89007dee2c9
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Wed Oct 7 10:52:47 2020 +0200

    options: Avoid unused variable mask warning [PR97305]
    
    > options-save.c: In function 'void cl_target_option_save(cl_target_option*, gcc_options*, gcc_options*)':
    > options-save.c:8526:26: error: unused variable 'mask' [-Werror=unused-variable]
    >  8526 |   unsigned HOST_WIDE_INT mask = 0;
    >       |                          ^~~~
    > options-save.c: In function 'void cl_target_option_restore(gcc_options*, gcc_options*, cl_target_option*)':
    > options-save.c:8537:26: error: unused variable 'mask' [-Werror=unused-variable]
    >  8537 |   unsigned HOST_WIDE_INT mask;
    >       |                          ^~~~
    
    Oops, missed that, sorry.
    
    The following patch should fix that, tested on x86_64-linux make
    options-save.c (same file as before) and -> ia64-linux cross make
    options-save.o (no warning anymore, just the unwanted declarations gone).
    
    2020-10-07  Jakub Jelinek  <jakub@redhat.com>
    
            PR bootstrap/97305
            * optc-save-gen.awk: Don't declare mask variable if explicit_mask
            array is not present.

Diff:
---
 gcc/optc-save-gen.awk | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/gcc/optc-save-gen.awk b/gcc/optc-save-gen.awk
index 5169acd5f58..a756835230e 100644
--- a/gcc/optc-save-gen.awk
+++ b/gcc/optc-save-gen.awk
@@ -597,11 +597,13 @@ for (i = 0; i < n_target_string; i++) {
 }
 
 print "";
-print "  unsigned HOST_WIDE_INT mask = 0;";
 
 j = 0;
 k = 0;
 for (i = 0; i < n_extra_target_vars; i++) {
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" extra_target_vars[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -617,6 +619,9 @@ for (i = 0; i < n_target_other; i++) {
 		print "  ptr->explicit_mask_" var_target_other[i] " = opts_set->x_" var_target_other[i] ";";
 		continue;
 	}
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" var_target_other[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -628,6 +633,9 @@ for (i = 0; i < n_target_other; i++) {
 }
 
 for (i = 0; i < n_target_enum; i++) {
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" var_target_enum[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -643,6 +651,9 @@ for (i = 0; i < n_target_int; i++) {
 		print "  ptr->explicit_mask_" var_target_int[i] " = opts_set->x_" var_target_int[i] ";";
 		continue;
 	}
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" var_target_int[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -654,6 +665,9 @@ for (i = 0; i < n_target_int; i++) {
 }
 
 for (i = 0; i < n_target_short; i++) {
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" var_target_short[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -665,6 +679,9 @@ for (i = 0; i < n_target_short; i++) {
 }
 
 for (i = 0; i < n_target_char; i++) {
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" var_target_char[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -676,6 +693,9 @@ for (i = 0; i < n_target_char; i++) {
 }
 
 for (i = 0; i < n_target_string; i++) {
+	if (j == 0 && k == 0) {
+		print "  unsigned HOST_WIDE_INT mask = 0;";
+	}
 	print "  if (opts_set->x_" var_target_string[i] ") mask |= HOST_WIDE_INT_1U << " j ";";
 	j++;
 	if (j == 64) {
@@ -732,7 +752,9 @@ for (i = 0; i < n_target_string; i++) {
 }
 
 print "";
-print "  unsigned HOST_WIDE_INT mask;";
+if (has_target_explicit_mask) {
+	print "  unsigned HOST_WIDE_INT mask;";
+}
 
 j = 64;
 k = 0;