* [testsuite] Port 2 testcases from redhat/gcc-4_4-branch
@ 2009-10-18 19:44 Jakub Jelinek
2009-10-19 15:42 ` Richard Henderson
0 siblings, 1 reply; 2+ messages in thread
From: Jakub Jelinek @ 2009-10-18 19:44 UTC (permalink / raw)
To: Janis Johnson; +Cc: gcc-patches
Hi!
These two testcases were added to redhat/gcc-4_4-branch together with a fix
that was deemed to be needed only for VTA 4.4 backport. But IMHO it makes
sense to add the testcases from it to the trunk anyway.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2009-10-18 Jakub Jelinek <jakub@redhat.com>
Port from redhat/gcc-4_4-branch:
2009-10-08 Jakub Jelinek <jakub@redhat.com>
* gcc.dg/debug/vta-2.c: New test.
2009-09-30 Alexandre Oliva <aoliva@redhat.com>
* gcc.dg/debug/vta-1.c: New.
--- gcc/testsuite/gcc.dg/debug/vta-1.c.jj 2009-10-18 14:45:47.000000000 +0200
+++ gcc/testsuite/gcc.dg/debug/vta-1.c 2009-10-18 14:46:48.000000000 +0200
@@ -0,0 +1,34 @@
+/* https://bugzilla.redhat.com/show_bug.cgi?id=521991#c5
+
+ Distilled from Linux XFS source code. foo, inlined into bar, ends
+ up with debug stmts referencing the addressable variable b.
+ Optimization made it non-addressable, and then completely optimized
+ away, before we got a chance to rename (and discard) the occurrence
+ in the debug stmt. When we did, we crashed, attempting to rename
+ an unreference variable. */
+
+/* { dg-do compile } */
+
+static inline int
+foo (void *x, unsigned y)
+{
+ unsigned z = *(unsigned long *) x % y;
+ *(unsigned long *) x = *(unsigned long *) x / y;
+ return z;
+}
+
+struct S
+{
+ unsigned t;
+};
+
+void
+bar (struct S *x, int *y)
+{
+ int a = 0;
+ unsigned long b = x->t;
+ foo (&b, x->t);
+ for (;; a++)
+ if (b)
+ *y = 1;
+}
--- gcc/testsuite/gcc.dg/debug/vta-2.c.jj 2009-10-18 14:45:50.000000000 +0200
+++ gcc/testsuite/gcc.dg/debug/vta-2.c 2009-10-18 14:46:54.000000000 +0200
@@ -0,0 +1,21 @@
+/* { dg-do compile } */
+
+static int
+bar (void *a, unsigned int b, int n)
+{
+ int c = *(unsigned long *) a % b;
+ *(unsigned long *) a = (int) (*(unsigned long *) a) / b;
+ return c;
+}
+
+int
+foo (unsigned long x, int *y, int z)
+{
+ int level;
+ for (level = 0; level < *y; level++)
+ {
+ bar (&x, z, sizeof (x));
+ if (x)
+ return *y - 1;
+ }
+}
Jakub
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [testsuite] Port 2 testcases from redhat/gcc-4_4-branch
2009-10-18 19:44 [testsuite] Port 2 testcases from redhat/gcc-4_4-branch Jakub Jelinek
@ 2009-10-19 15:42 ` Richard Henderson
0 siblings, 0 replies; 2+ messages in thread
From: Richard Henderson @ 2009-10-19 15:42 UTC (permalink / raw)
To: Jakub Jelinek; +Cc: Janis Johnson, gcc-patches
On 10/18/2009 12:22 PM, Jakub Jelinek wrote:
> Port from redhat/gcc-4_4-branch:
> 2009-10-08 Jakub Jelinek<jakub@redhat.com>
> * gcc.dg/debug/vta-2.c: New test.
>
> 2009-09-30 Alexandre Oliva<aoliva@redhat.com>
> * gcc.dg/debug/vta-1.c: New.
Ok.
r~
^ permalink raw reply [flat|nested] 2+ messages in thread
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