[gcc r17-2568] passes: Make gcc buildable again with mawk <= 1.3.3

https://gcc.gnu.org/g:a5541e39b3214f01a5039561a235412120682f8f

commit r17-2568-ga5541e39b3214f01a5039561a235412120682f8f
Author: Jakub Jelinek <[email protected]>
Date:   Mon Jul 20 19:27:23 2026 +0200

    passes: Make gcc buildable again with mawk <= 1.3.3
    
    On Wed, Jul 15, 2026 at 12:49:50PM -0400, Nathan Sidwell wrote:
    > Fair enough, I committed this
    
    Unfortunately it seems some versions of Debian/Ubuntu use mawk instead
    of gawk by default, and mawk pretends to be POSIX compatible, but at least
    versions <= 1.3.3 didn't support POSIX character classes.
    We don't really need the various UTF-8 fancy blanks, and even this very
    own script already uses sub(/^[ \t]*/, "", arg3); elsewhere, so this
    patch just replaces [[:blank:]] with [ \t].
    
    2026-07-20  Jakub Jelinek  <[email protected]>
    
            * gen-pass-instances.awk: Use [ \t] instead of [[:blank:]]
            for compatibility with mawk <= 1.3.3.
    
    Reviewed-by: Richard Biener <[email protected]>

Diff:
---
 gcc/gen-pass-instances.awk | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/gen-pass-instances.awk b/gcc/gen-pass-instances.awk
index 300e3ebad5b4..1d83fc61fbfd 100644
--- a/gcc/gen-pass-instances.awk
+++ b/gcc/gen-pass-instances.awk
@@ -167,17 +167,17 @@ function replace_pass(line, fnname,			num, i)
   lines[num] = new_line;
 }
 
-/^[[:blank:]]*INSERT_PASS_AFTER \(.+\)/ {
+/^[ \t]*INSERT_PASS_AFTER \(.+\)/ {
   insert_pass($0, "INSERT_PASS_AFTER", 1);
   next;
 }
 
-/^[[:blank:]]*INSERT_PASS_BEFORE \(.+\)/ {
+/^[ \t]*INSERT_PASS_BEFORE \(.+\)/ {
   insert_pass($0, "INSERT_PASS_BEFORE", 0);
   next;
 }
 
-/^[[:blank:]]*REPLACE_PASS \(.+\)/ {
+/^[ \t]*REPLACE_PASS \(.+\)/ {
   replace_pass($0, "REPLACE_PASS");
   next;
 }