PR tree-optimization/87112 - ICE in fold_binary_loc on strnlen of mixed integer types
gcc/ChangeLog:
PR tree-optimization/87112
* builtins.c (expand_builtin_strnlen): Convert c_strlen result to
the type of the bound argument.
gcc/testsuite/ChangeLog:
PR tree-optimization/87112
* gcc.dg/pr87112.c: New test.
===================================================================
@@ -2970,6 +2970,10 @@ expand_builtin_strnlen (tree exp, rtx target, mach
tree func = get_callee_fndecl (exp);
tree len = c_strlen (src, 0);
+ /* FIXME: Change c_strlen() to return sizetype instead of ssizetype
+ so these conversions aren't necessary. */
+ if (len)
+ len = fold_convert_loc (loc, TREE_TYPE (bound), len);
if (TREE_CODE (bound) == INTEGER_CST)
{
@@ -2984,7 +2988,6 @@ expand_builtin_strnlen (tree exp, rtx target, mach
if (!len || TREE_CODE (len) != INTEGER_CST)
return NULL_RTX;
- len = fold_convert_loc (loc, size_type_node, len);
len = fold_build2_loc (loc, MIN_EXPR, size_type_node, len, bound);
return expand_expr (len, target, target_mode, EXPAND_NORMAL);
}
===================================================================
@@ -0,0 +1,31 @@
+/* PR tree-optimization/87112 - ICE due to strnlen mixing integer types
+ { dg-do compile }
+ { dg-options "-Os -Wall" } */
+
+typedef __SIZE_TYPE__ size_t;
+
+extern size_t strnlen (const char*, size_t);
+
+size_t fi (int i)
+{
+ int n = i & 3;
+ return strnlen ("int", n);
+}
+
+size_t fui (unsigned i)
+{
+ unsigned n = i & 3;
+ return strnlen ("unsigned", n);
+}
+
+size_t fl (long i)
+{
+ long n = i & 3;
+ return strnlen ("long", n);
+}
+
+size_t fsz (size_t i)
+{
+ size_t n = i & 3;
+ return strnlen ("size_t", n);
+}