47 lines
1.1 KiB
Diff
47 lines
1.1 KiB
Diff
2015-12-04 Jakub Jelinek <jakub@redhat.com>
|
|
|
|
PR tree-optimization/68680
|
|
* calls.c (special_function_p): Return ECF_MAY_BE_ALLOCA for
|
|
BUILT_IN_ALLOCA{,_WITH_ALIGN}.
|
|
|
|
* gcc.target/i386/pr68680.c: New test.
|
|
|
|
--- gcc/calls.c (revision 231278)
|
|
+++ gcc/calls.c (revision 231279)
|
|
@@ -564,6 +564,17 @@ special_function_p (const_tree fndecl, i
|
|
flags |= ECF_NORETURN;
|
|
}
|
|
|
|
+ if (DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
|
|
+ switch (DECL_FUNCTION_CODE (fndecl))
|
|
+ {
|
|
+ case BUILT_IN_ALLOCA:
|
|
+ case BUILT_IN_ALLOCA_WITH_ALIGN:
|
|
+ flags |= ECF_MAY_BE_ALLOCA;
|
|
+ break;
|
|
+ default:
|
|
+ break;
|
|
+ }
|
|
+
|
|
return flags;
|
|
}
|
|
|
|
--- gcc/testsuite/gcc.target/i386/pr68680.c (revision 0)
|
|
+++ gcc/testsuite/gcc.target/i386/pr68680.c (revision 231279)
|
|
@@ -0,0 +1,15 @@
|
|
+/* PR tree-optimization/68680 */
|
|
+/* { dg-do compile } */
|
|
+/* { dg-options "-O2 -fstack-protector-strong" } */
|
|
+
|
|
+int foo (char *);
|
|
+
|
|
+int
|
|
+bar (unsigned long x)
|
|
+{
|
|
+ char a[x];
|
|
+ return foo (a);
|
|
+}
|
|
+
|
|
+/* Verify that this function is stack protected. */
|
|
+/* { dg-final { scan-assembler "stack_chk_fail" } } */
|