[gcc r16-9356] a68: fix lowering of maxabschar [PR algol68/126330]

https://gcc.gnu.org/g:34eadd96e105e38aed8a230bd29fe1297ebfde91

commit r16-9356-g34eadd96e105e38aed8a230bd29fe1297ebfde91
Author: Jose E. Marchesi <[email protected]>
Date:   Mon Jul 20 23:13:56 2026 +0200

    a68: fix lowering of maxabschar [PR algol68/126330]
    
    Signed-off-by: Jose E. Marchesi <[email protected]>
    
    gcc/algol68/ChangeLog
    
            PR algol68/126330
            * a68-low-chars.cc (a68_char_max): abscharmax is an int, not a
            char.
    
    gcc/testsuite/ChangeLog
    
            * algol68/execute/max-abs-char-1.a68: New test.
    
    (cherry picked from commit a69f9f381f229ae33cb18803d0fa916801b23570)

Diff:
---
 gcc/algol68/a68-low-chars.cc                     | 2 +-
 gcc/testsuite/algol68/execute/max-abs-char-1.a68 | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/algol68/a68-low-chars.cc b/gcc/algol68/a68-low-chars.cc
index dc01db0f7df8..90aa6f547ecd 100644
--- a/gcc/algol68/a68-low-chars.cc
+++ b/gcc/algol68/a68-low-chars.cc
@@ -55,7 +55,7 @@ tree
 a68_char_max (void)
 {
   /* 0x10FFFF is the maximum valid code point in Unicode.  */
-  return build_int_cst (a68_char_type, 0x10FFFF);
+  return build_int_cst (a68_int_type, 0x10FFFF);
 }
 
 /* Given an integral value, if it denotes a char code build the corresponding
diff --git a/gcc/testsuite/algol68/execute/max-abs-char-1.a68 b/gcc/testsuite/algol68/execute/max-abs-char-1.a68
new file mode 100644
index 000000000000..d4b9789a54e0
--- /dev/null
+++ b/gcc/testsuite/algol68/execute/max-abs-char-1.a68
@@ -0,0 +1 @@
+(assert(maxabschar = ABS 16r10ffff))