[gcc r16-2421] genpreds.cc: Do not use rawmemchr for insn_constraint_len

[Stefan Schulze Frielinghaus via Gcc-cvs]

https://gcc.gnu.org/g:65f044a3ef6f5abde2e45a92a503060909100706

commit r16-2421-g65f044a3ef6f5abde2e45a92a503060909100706
Author: Stefan Schulze Frielinghaus <stefa...@gcc.gnu.org>
Date:   Tue Jul 22 11:26:44 2025 +0200

    genpreds.cc: Do not use rawmemchr for insn_constraint_len
    
    The GNU extension rawmemchr cannot be used.  Therefore, replace it by a
    simple loop.
    
    gcc/ChangeLog:
    
            * genpreds.cc (write_insn_constraint_len): Replace rawmemchr by
            a loop.

Diff:
---
 gcc/genpreds.cc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/genpreds.cc b/gcc/genpreds.cc
index c6a2983419af..4f8beeb05140 100644
--- a/gcc/genpreds.cc
+++ b/gcc/genpreds.cc
@@ -1184,7 +1184,12 @@ write_insn_constraint_len (void)
   puts ("    default: break;\n"
        "    }\n"
        "  if (str[0] == '{')\n"
-       "      return ((const char *) rawmemchr (str + 1, '}') - str) + 1;\n"
+       "    {\n"
+       "      size_t len = 1;\n"
+       "      while (str[len] != '}' && str[len] != '\\0')\n"
+       "        ++len;\n"
+       "      return len + 1;\n"
+       "    }\n"
        "  return 1;\n"
        "}\n");
 }