gcc/gcc41-pr33136.patch

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2007-10-16 14:18:55 +00:00
2007-10-15 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/33136
* opts.c (decode_options): Don't enable flag_ipa_type_escape.
* gcc.c-torture/execute/20070824-1.c: New test.
* gcc.dg/pr33136-1.c: New test.
* gcc.dg/pr33136-2.c: New test.
* gcc.dg/pr33136-3.c: New test.
--- gcc/opts.c (revision 129365)
+++ gcc/opts.c (revision 129366)
@@ -473,7 +473,6 @@ decode_options (unsigned int argc, const
flag_cse_skip_blocks = 1;
flag_gcse = 1;
flag_expensive_optimizations = 1;
- flag_ipa_type_escape = 1;
flag_strength_reduce = 1;
flag_rerun_cse_after_loop = 1;
flag_rerun_loop_opt = 1;
--- gcc/testsuite/gcc.c-torture/execute/20070824-1.c (revision 0)
+++ gcc/testsuite/gcc.c-torture/execute/20070824-1.c (revision 129366)
@@ -0,0 +1,24 @@
+/* PR tree-optimization/33136 */
+
+extern void abort (void);
+
+struct S
+{
+ struct S *a;
+ int b;
+};
+
+int
+main (void)
+{
+ struct S *s = (struct S *) 0, **p, *n;
+ for (p = &s; *p; p = &(*p)->a);
+ n = (struct S *) __builtin_alloca (sizeof (*n));
+ n->a = *p;
+ n->b = 1;
+ *p = n;
+
+ if (!s)
+ abort ();
+ return 0;
+}
--- gcc/testsuite/gcc.dg/pr33136-1.c (revision 0)
+++ gcc/testsuite/gcc.dg/pr33136-1.c (revision 129366)
@@ -0,0 +1,54 @@
+/* PR tree-optimization/33136 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+struct S
+{
+ struct S *a;
+ int b;
+ float f;
+};
+
+static struct S s;
+
+static int *
+__attribute__((noinline, const))
+foo (void)
+{
+ return &s.b;
+}
+
+float
+__attribute__((noinline))
+bar (float *f)
+{
+ s.f = 1.0;
+ *f = 4.0;
+ return s.f;
+}
+
+int
+__attribute__((noinline))
+baz (int *x)
+{
+ s.b = 1;
+ *x = 4;
+ return s.b;
+}
+
+int
+t (void)
+{
+ float f = 8.0;
+ return bar (&f) + baz (foo ());
+}
+
+int
+main (void)
+{
+ if (t () != 5)
+ abort ();
+ return 0;
+}
--- gcc/testsuite/gcc.dg/pr33136-3.c (revision 0)
+++ gcc/testsuite/gcc.dg/pr33136-3.c (revision 129366)
@@ -0,0 +1,60 @@
+/* PR tree-optimization/33136 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+struct S
+{
+ void *a;
+ int b[3];
+ double *c;
+};
+static double d, e;
+
+static struct S s;
+
+static int *
+__attribute__((noinline, const))
+foo (void)
+{
+ return (int *) &s.b;
+}
+
+double *
+__attribute__((noinline))
+bar (double **f)
+{
+ s.c = &d;
+ *f = &e;
+ /* As nothing ever takes the address of any double * field in struct S,
+ the write to *f can't alias with the s.c field. */
+ return s.c;
+}
+
+int
+__attribute__((noinline))
+baz (int *x)
+{
+ s.b[0] = 1;
+ *x = 4;
+ /* Function foo takes address of an int array field in struct S,
+ so *x can alias with the s.b field (and it does in this testcase). */
+ return s.b[0];
+}
+
+int
+__attribute__((noinline))
+t (void)
+{
+ double *f = (double *) 0;
+ return 10 * (bar (&f) != &d) + baz (foo ());
+}
+
+int
+main (void)
+{
+ if (t () != 4)
+ abort ();
+ return 0;
+}
--- gcc/testsuite/gcc.dg/pr33136-2.c (revision 0)
+++ gcc/testsuite/gcc.dg/pr33136-2.c (revision 129366)
@@ -0,0 +1,60 @@
+/* PR tree-optimization/33136 */
+/* { dg-do run } */
+/* { dg-options "-O2" } */
+
+extern void abort (void);
+
+struct S
+{
+ void *a;
+ int b;
+ int *c;
+};
+static int d, e;
+
+static struct S s;
+
+static int *
+__attribute__((noinline, const))
+foo (void)
+{
+ return &s.b;
+}
+
+int *
+__attribute__((noinline))
+bar (int **f)
+{
+ s.c = &d;
+ *f = &e;
+ /* As nothing ever takes the address of any int * field in struct S,
+ the write to *f can't alias with the s.c field. */
+ return s.c;
+}
+
+int
+__attribute__((noinline))
+baz (int *x)
+{
+ s.b = 1;
+ *x = 4;
+ /* Function foo takes address of an int field in struct S,
+ so *x can alias with the s.b field (and it does in this testcase). */
+ return s.b;
+}
+
+int
+__attribute__((noinline))
+t (void)
+{
+ int *f = (int *) 0;
+ return 10 * (bar (&f) != &d) + baz (foo ());
+}
+
+int
+main (void)
+{
+ if (t () != 4)
+ abort ();
+ return 0;
+}