PATCH: PR testsuite/64427: gcc.target/i386/pr64291-1.c is invalid

[H.J. Lu]

Hi,

gcc.target/i386/pr64291-1.c has 2 issues:

1. Stack variables, n and d, aren't initialized.
2. dnp[dn - 1] |= 1UL<<63; doesn't work with 32-bit long.

I am checking this patch from

https://gcc.gnu.org/bugzilla/attachment.cgi?id=34342

as an obvious fix.


H.J.
2015-01-12  Marc Glisse  <marc.glisse@inria.fr>

	PR testsuite/64427
	* gcc.target/i386/pr64291-1.c: Limit to lp64 tarrget.  Avoid
	undefined behavior.
	* gcc.target/i386/pr64291-2.c: Updated.

diff --git a/gcc/testsuite/gcc.target/i386/pr64291-1.c b/gcc/testsuite/gcc.target/i386/pr64291-1.c
index 85253c0..1d3a380 100644
--- a/gcc/testsuite/gcc.target/i386/pr64291-1.c
+++ b/gcc/testsuite/gcc.target/i386/pr64291-1.c
@@ -1,6 +1,6 @@
 /* { dg-options "-O2" } */
 /* { dg-additional-sources pr64291-2.c } */
-/* { dg-do run } */
+/* { dg-do run { target lp64 } } */
 void f(void*,...);
 void g(void*,long,long);
 int nnn=0;
@@ -12,6 +12,7 @@ typedef struct
   unsigned long *_mp_d;
 } __mpz_struct;
 typedef __mpz_struct mpz_t[1];
+void h(mpz_t);
 
 int main ()
 {
@@ -21,7 +22,7 @@ int main ()
   long alloc, itch;
 
   f (n);
-  f (d);
+  h (d);
   qp = (unsigned long*)__builtin_alloca(4099*8) + 1;
   dnp = (unsigned long*)__builtin_alloca (2049*8);
   alloc = 1;
diff --git a/gcc/testsuite/gcc.target/i386/pr64291-2.c b/gcc/testsuite/gcc.target/i386/pr64291-2.c
index 2f3f929..7b7e88a 100644
--- a/gcc/testsuite/gcc.target/i386/pr64291-2.c
+++ b/gcc/testsuite/gcc.target/i386/pr64291-2.c
@@ -1,4 +1,14 @@
 /* { dg-do compile } */
-extern void abort (void);
+#include <assert.h>
 void f(void*p,...){}
-void g(void*p,long a,long b){if (a!=8) abort();}
+void g(void*p,long a,long b){assert(a==8);}
+typedef struct
+{
+  int _mp_size;
+  unsigned long *_mp_d;
+} __mpz_struct;
+typedef __mpz_struct mpz_t[1];
+void h(mpz_t x) {
+  x->_mp_d=0;
+  x->_mp_size=0;
+}