Hi!
This patch adds a new testcases, not exactly sure what is the exact
origin and what was the problem. The changes I've done are:
1) macroize, so that the test is just a few lines rather than 160KB,
verified -fdump-tree-gimple printf call is identical between this
and the original test
2) remove optimize(0) attribute, the test is compiled with -O0
3) use __builtin_alloca instead of alloca and add mtrace prototype,
remove -w because no warnings are emitted any longer
The test passes at least on x86_64-linux with -m32/-m64. Ok for trunk?
2018-01-19 Jeff Law <l...@redhat.com>
Jakub Jelinek <ja...@redhat.com>
* gcc.dg/stack-check-16.c: New test.
--- gcc/testsuite/gcc.dg/stack-check-16.c.jj 2018-01-19 11:58:39.325950389
+0100
+++ gcc/testsuite/gcc.dg/stack-check-16.c 2018-01-19 11:50:34.856026594
+0100
@@ -0,0 +1,36 @@
+/* { dg-do compile } */
+/* { dg-options "-fstack-clash-protection" } */
+/* { dg-require-effective-target supports_stack_clash_protection } */
+
+int printf (const char *, ...);
+void blah (char *space) { }
+void mtrace (void);
+
+int do_test (void)
+{
+ blah (__builtin_alloca (10));
+ mtrace ();
+ printf (
+#define A(a) "%" #a "$s"
+#define B(a) A(a)
+#define C(a,b,c,d) B(a##b##c##d)
+#define D(a,b,c) C(a,b,c,1) C(a,b,c,2) C(a,b,c,3) C(a,b,c,4) C(a,b,c,5) \
+ C(a,b,c,6) C(a,b,c,7) C(a,b,c,8) C(a,b,c,9)
+#define E(a,b,c) C(a,b,c,0) D(a,b,c)
+#define F(a,b) E(a,b,1) E(a,b,2) E(a,b,3) E(a,b,4) E(a,b,5) \
+ E(a,b,6) E(a,b,7) E(a,b,8) E(a,b,9)
+#define G(a,b) E(a,b,0) F(a,b)
+#define H(a) G(a,1) G(a,2) G(a,3) G(a,4) G(a,5) G(a,6) G(a,7) G(a,8) G(a,9)
+#define I(a) G(a,0) H(a)
+#define J I(1) I(2) I(3) I(4) I(5) I(6) I(7) I(8) I(9)
+ D(,,)
+ F(,)
+ H()
+ J
+ C(10,0,0,0) C(10,0,0,1),
+#undef A
+#define A(a) "a",
+ I(0) J
+ "\n");
+ return 0;
+}
Jakub
