Hi!
Seems I forgot to set_c_expr_source_range for the __builtin_stdc_rotate_*
case (the other __builtin_stdc_* cases already have it), which means
the locations in expr are uninitialized, sometimes causing ICEs in linemap
code, at other times just valgrind errors about uninitialized var uses.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2025-01-10 Jakub Jelinek <ja...@redhat.com>
PR c/118376
* c-parser.cc (c_parser_postfix_expression): Call
set_c_expr_source_range before break in the __builtin_stdc_rotate_*
case.
* gcc.dg/pr118376.c: New test.
--- gcc/c/c-parser.cc.jj 2025-01-06 10:07:33.585493775 +0100
+++ gcc/c/c-parser.cc 2025-01-09 16:12:07.761005082 +0100
@@ -12906,6 +12906,7 @@ c_parser_postfix_expression (c_parser *p
expr.value = build2_loc (loc, COMPOUND_EXPR,
TREE_TYPE (expr.value),
instrument_expr, expr.value);
+ set_c_expr_source_range (&expr, loc, close_paren_loc);
break;
}
tree barg1 = arg;
--- gcc/testsuite/gcc.dg/pr118376.c.jj 2025-01-09 16:26:19.621072359 +0100
+++ gcc/testsuite/gcc.dg/pr118376.c 2025-01-09 16:26:04.608283459 +0100
@@ -0,0 +1,11 @@
+/* PR c/118376 */
+/* { dg-do compile } */
+/* { dg-options "-Wsign-conversion" } */
+
+unsigned x;
+
+void
+foo ()
+{
+ __builtin_memset (&x, (long long) __builtin_stdc_rotate_right (x, 0), 1);
+} /* { dg-warning "conversion to 'int' from 'long long int' may change the
sign of the result" "" { target *-*-* } .-1 } */
Jakub
