Hi!

When libgfortran is compiled, there are some -Woverflow warnings like
../../../libgfortran/generated/maxloc0_4_m1.c:99:14: warning: unsigned 
conversion from ‘int’ to ‘GFC_UINTEGER_1’ {aka ‘unsigned char’} changes value 
from ‘-255’ to ‘1’ [-Woverflow]
   99 |     maxval = -GFC_UINTEGER_1_HUGE;
      |              ^
and those actually point a bug in the maxloc*/maxval* implementation
for UNSIGNED.
The intent of
#if defined ('atype_inf`)
        result = -atype_inf;
#else
        result = atype_min;
#endif
(or similar for maxval) is to initialize the variable with
minimum value of the type, if the type has infinities, then
negative infinity, otherwise the minimum (normalized) value.
atype_min expands for signed integers to say (-GFC_INTEGER_4_HUGE-1)
or for floating point to say -GFC_REAL_8_HUGE.
For UNSIGNED it expands to e.g. -GFC_UINTEGER_4_HUGE, but that is
-0xffffffffU which is 1U, while the minimum value of the type is
0.
Haven't tried to construct testcases for that, but I believe e.g.
maskval could return incorrectly 1 on an array (or masked array)
full of 0s, or maxloc could identify incorrectly the maximum location.

The following patch makes sure atype_min expands to 0 for atype_name
GFC_UINTEGER*.

Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk and
15.2?

2025-05-07  Jakub Jelinek  <ja...@redhat.com>

        PR libfortran/120158
        * m4/iparm.m4 (atype_min): For atype_name starting with
        GFC_UINTEGER define to 0.
        * generated/maxloc0_16_m1.c: Regenerate.
        * generated/maxloc0_16_m2.c: Regenerate.
        * generated/maxloc0_16_m4.c: Regenerate.
        * generated/maxloc0_16_m8.c: Regenerate.
        * generated/maxloc0_16_m16.c: Regenerate.
        * generated/maxloc0_4_m1.c: Regenerate.
        * generated/maxloc0_4_m2.c: Regenerate.
        * generated/maxloc0_4_m4.c: Regenerate.
        * generated/maxloc0_4_m8.c: Regenerate.
        * generated/maxloc0_4_m16.c: Regenerate.
        * generated/maxloc0_8_m1.c: Regenerate.
        * generated/maxloc0_8_m2.c: Regenerate.
        * generated/maxloc0_8_m4.c: Regenerate.
        * generated/maxloc0_8_m8.c: Regenerate.
        * generated/maxloc0_8_m16.c: Regenerate.
        * generated/maxloc1_16_m1.c: Regenerate.
        * generated/maxloc1_16_m2.c: Regenerate.
        * generated/maxloc1_16_m4.c: Regenerate.
        * generated/maxloc1_16_m8.c: Regenerate.
        * generated/maxloc1_16_m16.c: Regenerate.
        * generated/maxloc1_4_m1.c: Regenerate.
        * generated/maxloc1_4_m2.c: Regenerate.
        * generated/maxloc1_4_m4.c: Regenerate.
        * generated/maxloc1_4_m8.c: Regenerate.
        * generated/maxloc1_4_m16.c: Regenerate.
        * generated/maxloc1_8_m1.c: Regenerate.
        * generated/maxloc1_8_m2.c: Regenerate.
        * generated/maxloc1_8_m4.c: Regenerate.
        * generated/maxloc1_8_m8.c: Regenerate.
        * generated/maxloc1_8_m16.c: Regenerate.
        * generated/maxval_m1.c: Regenerate.
        * generated/maxval_m2.c: Regenerate.
        * generated/maxval_m4.c: Regenerate.
        * generated/maxval_m8.c: Regenerate.
        * generated/maxval_m16.c: Regenerate.

--- libgfortran/m4/iparm.m4.jj  2024-09-25 17:25:07.201360961 +0200
+++ libgfortran/m4/iparm.m4     2025-05-07 16:45:48.674397766 +0200
@@ -28,7 +28,7 @@ define_type(rtype, rtype_tmp)dnl
 define(rtype_qual,`_'rtype_kind)dnl
 ')dnl
 define(atype_max, atype_name`_HUGE')dnl
-define(atype_min,ifelse(regexp(file, `_\(.\)[0-9]*\.c$', 
`\1'),`i',`(-'atype_max`-1)',`-'atype_max))dnl
+define(atype_min,ifelse(index(atype_name,`GFC_UINTEGER'),0,`0',ifelse(regexp(file,
 `_\(.\)[0-9]*\.c$', `\1'),`i',`(-'atype_max`-1)',`-'atype_max)))dnl
 define(atype_inf, atype_name`_INFINITY')dnl
 define(atype_nan, atype_name`_QUIET_NAN')dnl
 define(name, regexp(regexp(file, `[^/]*$', `\&'), `^\([^_]*\)_', `\1'))dnl
--- libgfortran/generated/maxloc0_16_m1.c.jj    2025-01-02 20:54:32.768121076 
+0100
+++ libgfortran/generated/maxloc0_16_m1.c       2025-05-07 16:47:35.422000527 
+0200
@@ -96,7 +96,7 @@ maxloc0_16_m1 (gfc_array_i16 * const res
 #if defined(GFC_UINTEGER_1_INFINITY)
     maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_1_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_16_m1 (gfc_array_i16 * const re
 #if defined(GFC_UINTEGER_1_INFINITY)
     maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_1_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_16_m2.c.jj    2025-01-02 20:54:32.768121076 
+0100
+++ libgfortran/generated/maxloc0_16_m2.c       2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_16_m2 (gfc_array_i16 * const res
 #if defined(GFC_UINTEGER_2_INFINITY)
     maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_2_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_16_m2 (gfc_array_i16 * const re
 #if defined(GFC_UINTEGER_2_INFINITY)
     maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_2_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_16_m4.c.jj    2025-01-02 20:54:32.768121076 
+0100
+++ libgfortran/generated/maxloc0_16_m4.c       2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_16_m4 (gfc_array_i16 * const res
 #if defined(GFC_UINTEGER_4_INFINITY)
     maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_4_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_16_m4 (gfc_array_i16 * const re
 #if defined(GFC_UINTEGER_4_INFINITY)
     maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_4_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_16_m8.c.jj    2025-01-02 20:54:32.768121076 
+0100
+++ libgfortran/generated/maxloc0_16_m8.c       2025-05-07 16:47:35.424000501 
+0200
@@ -96,7 +96,7 @@ maxloc0_16_m8 (gfc_array_i16 * const res
 #if defined(GFC_UINTEGER_8_INFINITY)
     maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_8_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_16_m8 (gfc_array_i16 * const re
 #if defined(GFC_UINTEGER_8_INFINITY)
     maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_8_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_16_m16.c.jj   2025-01-02 20:54:32.768121076 
+0100
+++ libgfortran/generated/maxloc0_16_m16.c      2025-05-07 16:47:35.424000501 
+0200
@@ -96,7 +96,7 @@ maxloc0_16_m16 (gfc_array_i16 * const re
 #if defined(GFC_UINTEGER_16_INFINITY)
     maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_16_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_16_m16 (gfc_array_i16 * const r
 #if defined(GFC_UINTEGER_16_INFINITY)
     maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_16_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_4_m1.c.jj     2025-01-02 20:54:32.769121062 
+0100
+++ libgfortran/generated/maxloc0_4_m1.c        2025-05-07 16:47:35.422000527 
+0200
@@ -96,7 +96,7 @@ maxloc0_4_m1 (gfc_array_i4 * const restr
 #if defined(GFC_UINTEGER_1_INFINITY)
     maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_1_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_4_m1 (gfc_array_i4 * const rest
 #if defined(GFC_UINTEGER_1_INFINITY)
     maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_1_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_4_m2.c.jj     2025-01-02 20:54:32.769121062 
+0100
+++ libgfortran/generated/maxloc0_4_m2.c        2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_4_m2 (gfc_array_i4 * const restr
 #if defined(GFC_UINTEGER_2_INFINITY)
     maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_2_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_4_m2 (gfc_array_i4 * const rest
 #if defined(GFC_UINTEGER_2_INFINITY)
     maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_2_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_4_m4.c.jj     2025-01-02 20:54:32.769121062 
+0100
+++ libgfortran/generated/maxloc0_4_m4.c        2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_4_m4 (gfc_array_i4 * const restr
 #if defined(GFC_UINTEGER_4_INFINITY)
     maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_4_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_4_m4 (gfc_array_i4 * const rest
 #if defined(GFC_UINTEGER_4_INFINITY)
     maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_4_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_4_m8.c.jj     2025-01-02 20:54:32.769121062 
+0100
+++ libgfortran/generated/maxloc0_4_m8.c        2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_4_m8 (gfc_array_i4 * const restr
 #if defined(GFC_UINTEGER_8_INFINITY)
     maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_8_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_4_m8 (gfc_array_i4 * const rest
 #if defined(GFC_UINTEGER_8_INFINITY)
     maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_8_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_4_m16.c.jj    2025-01-02 20:54:32.769121062 
+0100
+++ libgfortran/generated/maxloc0_4_m16.c       2025-05-07 16:47:35.424000501 
+0200
@@ -96,7 +96,7 @@ maxloc0_4_m16 (gfc_array_i4 * const rest
 #if defined(GFC_UINTEGER_16_INFINITY)
     maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_16_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_4_m16 (gfc_array_i4 * const res
 #if defined(GFC_UINTEGER_16_INFINITY)
     maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_16_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_8_m1.c.jj     2025-01-02 20:54:32.770121048 
+0100
+++ libgfortran/generated/maxloc0_8_m1.c        2025-05-07 16:47:35.422000527 
+0200
@@ -96,7 +96,7 @@ maxloc0_8_m1 (gfc_array_i8 * const restr
 #if defined(GFC_UINTEGER_1_INFINITY)
     maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_1_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_8_m1 (gfc_array_i8 * const rest
 #if defined(GFC_UINTEGER_1_INFINITY)
     maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_1_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_8_m2.c.jj     2025-01-02 20:54:32.770121048 
+0100
+++ libgfortran/generated/maxloc0_8_m2.c        2025-05-07 16:47:35.422000527 
+0200
@@ -96,7 +96,7 @@ maxloc0_8_m2 (gfc_array_i8 * const restr
 #if defined(GFC_UINTEGER_2_INFINITY)
     maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_2_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_8_m2 (gfc_array_i8 * const rest
 #if defined(GFC_UINTEGER_2_INFINITY)
     maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_2_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_8_m4.c.jj     2025-01-02 20:54:32.770121048 
+0100
+++ libgfortran/generated/maxloc0_8_m4.c        2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_8_m4 (gfc_array_i8 * const restr
 #if defined(GFC_UINTEGER_4_INFINITY)
     maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_4_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_8_m4 (gfc_array_i8 * const rest
 #if defined(GFC_UINTEGER_4_INFINITY)
     maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_4_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_8_m8.c.jj     2025-01-02 20:54:32.770121048 
+0100
+++ libgfortran/generated/maxloc0_8_m8.c        2025-05-07 16:47:35.423000514 
+0200
@@ -96,7 +96,7 @@ maxloc0_8_m8 (gfc_array_i8 * const restr
 #if defined(GFC_UINTEGER_8_INFINITY)
     maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_8_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_8_m8 (gfc_array_i8 * const rest
 #if defined(GFC_UINTEGER_8_INFINITY)
     maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_8_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc0_8_m16.c.jj    2025-01-02 20:54:32.770121048 
+0100
+++ libgfortran/generated/maxloc0_8_m16.c       2025-05-07 16:47:35.424000501 
+0200
@@ -96,7 +96,7 @@ maxloc0_8_m16 (gfc_array_i8 * const rest
 #if defined(GFC_UINTEGER_16_INFINITY)
     maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_16_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
@@ -271,7 +271,7 @@ mmaxloc0_8_m16 (gfc_array_i8 * const res
 #if defined(GFC_UINTEGER_16_INFINITY)
     maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-    maxval = -GFC_UINTEGER_16_HUGE;
+    maxval = 0;
 #endif
   while (base)
     {
--- libgfortran/generated/maxloc1_16_m1.c.jj    2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_16_m1.c       2025-05-07 16:47:35.432000396 
+0200
@@ -147,7 +147,7 @@ maxloc1_16_m1 (gfc_array_i16 * const res
 #if defined (GFC_UINTEGER_1_INFINITY)
        maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_1_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_16_m1 (gfc_array_i16 * const re
 #if defined (GFC_UINTEGER_1_INFINITY)
        maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_1_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_1_QUIET_NAN)
        GFC_INTEGER_16 result2 = 0;
--- libgfortran/generated/maxloc1_16_m2.c.jj    2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_16_m2.c       2025-05-07 16:47:35.433000383 
+0200
@@ -147,7 +147,7 @@ maxloc1_16_m2 (gfc_array_i16 * const res
 #if defined (GFC_UINTEGER_2_INFINITY)
        maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_2_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_16_m2 (gfc_array_i16 * const re
 #if defined (GFC_UINTEGER_2_INFINITY)
        maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_2_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_2_QUIET_NAN)
        GFC_INTEGER_16 result2 = 0;
--- libgfortran/generated/maxloc1_16_m4.c.jj    2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_16_m4.c       2025-05-07 16:47:35.434000370 
+0200
@@ -147,7 +147,7 @@ maxloc1_16_m4 (gfc_array_i16 * const res
 #if defined (GFC_UINTEGER_4_INFINITY)
        maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_4_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_16_m4 (gfc_array_i16 * const re
 #if defined (GFC_UINTEGER_4_INFINITY)
        maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_4_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_4_QUIET_NAN)
        GFC_INTEGER_16 result2 = 0;
--- libgfortran/generated/maxloc1_16_m8.c.jj    2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_16_m8.c       2025-05-07 16:47:35.434000370 
+0200
@@ -147,7 +147,7 @@ maxloc1_16_m8 (gfc_array_i16 * const res
 #if defined (GFC_UINTEGER_8_INFINITY)
        maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_8_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_16_m8 (gfc_array_i16 * const re
 #if defined (GFC_UINTEGER_8_INFINITY)
        maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_8_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_8_QUIET_NAN)
        GFC_INTEGER_16 result2 = 0;
--- libgfortran/generated/maxloc1_16_m16.c.jj   2025-05-07 13:20:25.785034695 
+0200
+++ libgfortran/generated/maxloc1_16_m16.c      2025-05-07 16:47:35.435000357 
+0200
@@ -147,7 +147,7 @@ maxloc1_16_m16 (gfc_array_i16 * const re
 #if defined (GFC_UINTEGER_16_INFINITY)
        maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_16_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_16_m16 (gfc_array_i16 * const r
 #if defined (GFC_UINTEGER_16_INFINITY)
        maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_16_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_16_QUIET_NAN)
        GFC_INTEGER_16 result2 = 0;
--- libgfortran/generated/maxloc1_4_m1.c.jj     2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_4_m1.c        2025-05-07 16:47:35.432000396 
+0200
@@ -147,7 +147,7 @@ maxloc1_4_m1 (gfc_array_i4 * const restr
 #if defined (GFC_UINTEGER_1_INFINITY)
        maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_1_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_4_m1 (gfc_array_i4 * const rest
 #if defined (GFC_UINTEGER_1_INFINITY)
        maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_1_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_1_QUIET_NAN)
        GFC_INTEGER_4 result2 = 0;
--- libgfortran/generated/maxloc1_4_m2.c.jj     2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_4_m2.c        2025-05-07 16:47:35.432000396 
+0200
@@ -147,7 +147,7 @@ maxloc1_4_m2 (gfc_array_i4 * const restr
 #if defined (GFC_UINTEGER_2_INFINITY)
        maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_2_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_4_m2 (gfc_array_i4 * const rest
 #if defined (GFC_UINTEGER_2_INFINITY)
        maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_2_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_2_QUIET_NAN)
        GFC_INTEGER_4 result2 = 0;
--- libgfortran/generated/maxloc1_4_m4.c.jj     2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_4_m4.c        2025-05-07 16:47:35.433000383 
+0200
@@ -147,7 +147,7 @@ maxloc1_4_m4 (gfc_array_i4 * const restr
 #if defined (GFC_UINTEGER_4_INFINITY)
        maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_4_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_4_m4 (gfc_array_i4 * const rest
 #if defined (GFC_UINTEGER_4_INFINITY)
        maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_4_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_4_QUIET_NAN)
        GFC_INTEGER_4 result2 = 0;
--- libgfortran/generated/maxloc1_4_m8.c.jj     2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_4_m8.c        2025-05-07 16:47:35.433000383 
+0200
@@ -147,7 +147,7 @@ maxloc1_4_m8 (gfc_array_i4 * const restr
 #if defined (GFC_UINTEGER_8_INFINITY)
        maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_8_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_4_m8 (gfc_array_i4 * const rest
 #if defined (GFC_UINTEGER_8_INFINITY)
        maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_8_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_8_QUIET_NAN)
        GFC_INTEGER_4 result2 = 0;
--- libgfortran/generated/maxloc1_4_m16.c.jj    2025-01-02 20:54:32.771121035 
+0100
+++ libgfortran/generated/maxloc1_4_m16.c       2025-05-07 16:47:35.434000370 
+0200
@@ -147,7 +147,7 @@ maxloc1_4_m16 (gfc_array_i4 * const rest
 #if defined (GFC_UINTEGER_16_INFINITY)
        maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_16_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_4_m16 (gfc_array_i4 * const res
 #if defined (GFC_UINTEGER_16_INFINITY)
        maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_16_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_16_QUIET_NAN)
        GFC_INTEGER_4 result2 = 0;
--- libgfortran/generated/maxloc1_8_m1.c.jj     2025-01-02 20:54:32.772121021 
+0100
+++ libgfortran/generated/maxloc1_8_m1.c        2025-05-07 16:47:35.432000396 
+0200
@@ -147,7 +147,7 @@ maxloc1_8_m1 (gfc_array_i8 * const restr
 #if defined (GFC_UINTEGER_1_INFINITY)
        maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_1_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_8_m1 (gfc_array_i8 * const rest
 #if defined (GFC_UINTEGER_1_INFINITY)
        maxval = -GFC_UINTEGER_1_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_1_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_1_QUIET_NAN)
        GFC_INTEGER_8 result2 = 0;
--- libgfortran/generated/maxloc1_8_m2.c.jj     2025-01-02 20:54:32.772121021 
+0100
+++ libgfortran/generated/maxloc1_8_m2.c        2025-05-07 16:47:35.432000396 
+0200
@@ -147,7 +147,7 @@ maxloc1_8_m2 (gfc_array_i8 * const restr
 #if defined (GFC_UINTEGER_2_INFINITY)
        maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_2_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_8_m2 (gfc_array_i8 * const rest
 #if defined (GFC_UINTEGER_2_INFINITY)
        maxval = -GFC_UINTEGER_2_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_2_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_2_QUIET_NAN)
        GFC_INTEGER_8 result2 = 0;
--- libgfortran/generated/maxloc1_8_m4.c.jj     2025-01-02 20:54:32.772121021 
+0100
+++ libgfortran/generated/maxloc1_8_m4.c        2025-05-07 16:47:35.433000383 
+0200
@@ -147,7 +147,7 @@ maxloc1_8_m4 (gfc_array_i8 * const restr
 #if defined (GFC_UINTEGER_4_INFINITY)
        maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_4_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_8_m4 (gfc_array_i8 * const rest
 #if defined (GFC_UINTEGER_4_INFINITY)
        maxval = -GFC_UINTEGER_4_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_4_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_4_QUIET_NAN)
        GFC_INTEGER_8 result2 = 0;
--- libgfortran/generated/maxloc1_8_m8.c.jj     2025-01-02 20:54:32.772121021 
+0100
+++ libgfortran/generated/maxloc1_8_m8.c        2025-05-07 16:47:35.434000370 
+0200
@@ -147,7 +147,7 @@ maxloc1_8_m8 (gfc_array_i8 * const restr
 #if defined (GFC_UINTEGER_8_INFINITY)
        maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_8_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_8_m8 (gfc_array_i8 * const rest
 #if defined (GFC_UINTEGER_8_INFINITY)
        maxval = -GFC_UINTEGER_8_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_8_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_8_QUIET_NAN)
        GFC_INTEGER_8 result2 = 0;
--- libgfortran/generated/maxloc1_8_m16.c.jj    2025-01-02 20:54:32.772121021 
+0100
+++ libgfortran/generated/maxloc1_8_m16.c       2025-05-07 16:47:35.434000370 
+0200
@@ -147,7 +147,7 @@ maxloc1_8_m16 (gfc_array_i8 * const rest
 #if defined (GFC_UINTEGER_16_INFINITY)
        maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_16_HUGE;
+       maxval = 0;
 #endif
        result = 1;
        if (len <= 0)
@@ -366,7 +366,7 @@ mmaxloc1_8_m16 (gfc_array_i8 * const res
 #if defined (GFC_UINTEGER_16_INFINITY)
        maxval = -GFC_UINTEGER_16_INFINITY;
 #else
-       maxval = -GFC_UINTEGER_16_HUGE;
+       maxval = 0;
 #endif
 #if defined (GFC_UINTEGER_16_QUIET_NAN)
        GFC_INTEGER_8 result2 = 0;
--- libgfortran/generated/maxval_m1.c.jj        2025-01-02 20:54:32.773121007 
+0100
+++ libgfortran/generated/maxval_m1.c   2025-05-07 16:47:35.439000305 +0200
@@ -143,10 +143,10 @@ maxval_m1 (gfc_array_m1 * const restrict
 #if defined (GFC_UINTEGER_1_INFINITY)
        result = -GFC_UINTEGER_1_INFINITY;
 #else
-       result = -GFC_UINTEGER_1_HUGE;
+       result = 0;
 #endif
        if (len <= 0)
-         *dest = -GFC_UINTEGER_1_HUGE;
+         *dest = 0;
        else
          {
 #if ! defined HAVE_BACK_ARG
@@ -351,7 +351,7 @@ mmaxval_m1 (gfc_array_m1 * const restric
 #if defined (GFC_UINTEGER_1_INFINITY)
        result = -GFC_UINTEGER_1_INFINITY;
 #else
-       result = -GFC_UINTEGER_1_HUGE;
+       result = 0;
 #endif
 #if defined (GFC_UINTEGER_1_QUIET_NAN)
        int non_empty_p = 0;
@@ -372,9 +372,9 @@ mmaxval_m1 (gfc_array_m1 * const restric
            if (unlikely (n >= len))
              {
 #if defined (GFC_UINTEGER_1_QUIET_NAN)
-               result = non_empty_p ? GFC_UINTEGER_1_QUIET_NAN : 
-GFC_UINTEGER_1_HUGE;
+               result = non_empty_p ? GFC_UINTEGER_1_QUIET_NAN : 0;
 #else
-               result = -GFC_UINTEGER_1_HUGE;
+               result = 0;
 #endif
              }
            else for (; n < len; n++, src += delta, msrc += mdelta)
@@ -535,7 +535,7 @@ smaxval_m1 (gfc_array_m1 * const restric
 
   while(1)
     {
-      *dest = -GFC_UINTEGER_1_HUGE;
+      *dest = 0;
       count[0]++;
       dest += dstride[0];
       n = 0;
--- libgfortran/generated/maxval_m2.c.jj        2025-01-02 20:54:32.773121007 
+0100
+++ libgfortran/generated/maxval_m2.c   2025-05-07 16:47:35.439000305 +0200
@@ -143,10 +143,10 @@ maxval_m2 (gfc_array_m2 * const restrict
 #if defined (GFC_UINTEGER_2_INFINITY)
        result = -GFC_UINTEGER_2_INFINITY;
 #else
-       result = -GFC_UINTEGER_2_HUGE;
+       result = 0;
 #endif
        if (len <= 0)
-         *dest = -GFC_UINTEGER_2_HUGE;
+         *dest = 0;
        else
          {
 #if ! defined HAVE_BACK_ARG
@@ -351,7 +351,7 @@ mmaxval_m2 (gfc_array_m2 * const restric
 #if defined (GFC_UINTEGER_2_INFINITY)
        result = -GFC_UINTEGER_2_INFINITY;
 #else
-       result = -GFC_UINTEGER_2_HUGE;
+       result = 0;
 #endif
 #if defined (GFC_UINTEGER_2_QUIET_NAN)
        int non_empty_p = 0;
@@ -372,9 +372,9 @@ mmaxval_m2 (gfc_array_m2 * const restric
            if (unlikely (n >= len))
              {
 #if defined (GFC_UINTEGER_2_QUIET_NAN)
-               result = non_empty_p ? GFC_UINTEGER_2_QUIET_NAN : 
-GFC_UINTEGER_2_HUGE;
+               result = non_empty_p ? GFC_UINTEGER_2_QUIET_NAN : 0;
 #else
-               result = -GFC_UINTEGER_2_HUGE;
+               result = 0;
 #endif
              }
            else for (; n < len; n++, src += delta, msrc += mdelta)
@@ -535,7 +535,7 @@ smaxval_m2 (gfc_array_m2 * const restric
 
   while(1)
     {
-      *dest = -GFC_UINTEGER_2_HUGE;
+      *dest = 0;
       count[0]++;
       dest += dstride[0];
       n = 0;
--- libgfortran/generated/maxval_m4.c.jj        2025-01-02 20:54:32.773121007 
+0100
+++ libgfortran/generated/maxval_m4.c   2025-05-07 16:47:35.440000292 +0200
@@ -143,10 +143,10 @@ maxval_m4 (gfc_array_m4 * const restrict
 #if defined (GFC_UINTEGER_4_INFINITY)
        result = -GFC_UINTEGER_4_INFINITY;
 #else
-       result = -GFC_UINTEGER_4_HUGE;
+       result = 0;
 #endif
        if (len <= 0)
-         *dest = -GFC_UINTEGER_4_HUGE;
+         *dest = 0;
        else
          {
 #if ! defined HAVE_BACK_ARG
@@ -351,7 +351,7 @@ mmaxval_m4 (gfc_array_m4 * const restric
 #if defined (GFC_UINTEGER_4_INFINITY)
        result = -GFC_UINTEGER_4_INFINITY;
 #else
-       result = -GFC_UINTEGER_4_HUGE;
+       result = 0;
 #endif
 #if defined (GFC_UINTEGER_4_QUIET_NAN)
        int non_empty_p = 0;
@@ -372,9 +372,9 @@ mmaxval_m4 (gfc_array_m4 * const restric
            if (unlikely (n >= len))
              {
 #if defined (GFC_UINTEGER_4_QUIET_NAN)
-               result = non_empty_p ? GFC_UINTEGER_4_QUIET_NAN : 
-GFC_UINTEGER_4_HUGE;
+               result = non_empty_p ? GFC_UINTEGER_4_QUIET_NAN : 0;
 #else
-               result = -GFC_UINTEGER_4_HUGE;
+               result = 0;
 #endif
              }
            else for (; n < len; n++, src += delta, msrc += mdelta)
@@ -535,7 +535,7 @@ smaxval_m4 (gfc_array_m4 * const restric
 
   while(1)
     {
-      *dest = -GFC_UINTEGER_4_HUGE;
+      *dest = 0;
       count[0]++;
       dest += dstride[0];
       n = 0;
--- libgfortran/generated/maxval_m8.c.jj        2025-01-02 20:54:32.773121007 
+0100
+++ libgfortran/generated/maxval_m8.c   2025-05-07 16:47:35.440000292 +0200
@@ -143,10 +143,10 @@ maxval_m8 (gfc_array_m8 * const restrict
 #if defined (GFC_UINTEGER_8_INFINITY)
        result = -GFC_UINTEGER_8_INFINITY;
 #else
-       result = -GFC_UINTEGER_8_HUGE;
+       result = 0;
 #endif
        if (len <= 0)
-         *dest = -GFC_UINTEGER_8_HUGE;
+         *dest = 0;
        else
          {
 #if ! defined HAVE_BACK_ARG
@@ -351,7 +351,7 @@ mmaxval_m8 (gfc_array_m8 * const restric
 #if defined (GFC_UINTEGER_8_INFINITY)
        result = -GFC_UINTEGER_8_INFINITY;
 #else
-       result = -GFC_UINTEGER_8_HUGE;
+       result = 0;
 #endif
 #if defined (GFC_UINTEGER_8_QUIET_NAN)
        int non_empty_p = 0;
@@ -372,9 +372,9 @@ mmaxval_m8 (gfc_array_m8 * const restric
            if (unlikely (n >= len))
              {
 #if defined (GFC_UINTEGER_8_QUIET_NAN)
-               result = non_empty_p ? GFC_UINTEGER_8_QUIET_NAN : 
-GFC_UINTEGER_8_HUGE;
+               result = non_empty_p ? GFC_UINTEGER_8_QUIET_NAN : 0;
 #else
-               result = -GFC_UINTEGER_8_HUGE;
+               result = 0;
 #endif
              }
            else for (; n < len; n++, src += delta, msrc += mdelta)
@@ -535,7 +535,7 @@ smaxval_m8 (gfc_array_m8 * const restric
 
   while(1)
     {
-      *dest = -GFC_UINTEGER_8_HUGE;
+      *dest = 0;
       count[0]++;
       dest += dstride[0];
       n = 0;
--- libgfortran/generated/maxval_m16.c.jj       2025-01-02 20:54:32.773121007 
+0100
+++ libgfortran/generated/maxval_m16.c  2025-05-07 16:47:35.440000292 +0200
@@ -143,10 +143,10 @@ maxval_m16 (gfc_array_m16 * const restri
 #if defined (GFC_UINTEGER_16_INFINITY)
        result = -GFC_UINTEGER_16_INFINITY;
 #else
-       result = -GFC_UINTEGER_16_HUGE;
+       result = 0;
 #endif
        if (len <= 0)
-         *dest = -GFC_UINTEGER_16_HUGE;
+         *dest = 0;
        else
          {
 #if ! defined HAVE_BACK_ARG
@@ -351,7 +351,7 @@ mmaxval_m16 (gfc_array_m16 * const restr
 #if defined (GFC_UINTEGER_16_INFINITY)
        result = -GFC_UINTEGER_16_INFINITY;
 #else
-       result = -GFC_UINTEGER_16_HUGE;
+       result = 0;
 #endif
 #if defined (GFC_UINTEGER_16_QUIET_NAN)
        int non_empty_p = 0;
@@ -372,9 +372,9 @@ mmaxval_m16 (gfc_array_m16 * const restr
            if (unlikely (n >= len))
              {
 #if defined (GFC_UINTEGER_16_QUIET_NAN)
-               result = non_empty_p ? GFC_UINTEGER_16_QUIET_NAN : 
-GFC_UINTEGER_16_HUGE;
+               result = non_empty_p ? GFC_UINTEGER_16_QUIET_NAN : 0;
 #else
-               result = -GFC_UINTEGER_16_HUGE;
+               result = 0;
 #endif
              }
            else for (; n < len; n++, src += delta, msrc += mdelta)
@@ -535,7 +535,7 @@ smaxval_m16 (gfc_array_m16 * const restr
 
   while(1)
     {
-      *dest = -GFC_UINTEGER_16_HUGE;
+      *dest = 0;
       count[0]++;
       dest += dstride[0];
       n = 0;

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