This is a backport of r194470 to the gcc-4.7 branch. It fixes a case
were n_functions in coverage_obj_finish is 0 and the resulting array
contains 0x100000000 elements.
(Mike Hommey pointed out that Fixefox PGO-build is broken using 4.7
because of this bug)
Bootstrapped and tested on x86_64-unknown-linux-gnu.
OK for gcc-4_7-branch?
---
gcc/ChangeLog | 9 +++++++++
gcc/coverage.c | 3 +++
gcc/testsuite/ChangeLog | 9 +++++++++
gcc/testsuite/g++.dg/other/pr55650.C | 21 +++++++++++++++++++++
gcc/testsuite/g++.dg/other/pr55650.cc | 4 ++++
5 files changed, 46 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/other/pr55650.C
create mode 100644 gcc/testsuite/g++.dg/other/pr55650.cc
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c8e08cf9a40b..4cfc1b1d0c80 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2014-01-29 Markus Trippelsdorf <mar...@trippelsdorf.de>
+
+ Backport from mainline
+ 2012-12-13 Jakub Jelinek <ja...@redhat.com>
+
+ PR gcov-profile/55650
+ * coverage.c (coverage_obj_init): Return false if no functions
+ are being emitted.
+
2014-01-25 Walter Lee <w...@tilera.com>
Backport from mainline
diff --git a/gcc/coverage.c b/gcc/coverage.c
index c64125ad58b0..8a113a50c2e2 100644
--- a/gcc/coverage.c
+++ b/gcc/coverage.c
@@ -988,6 +988,9 @@ coverage_obj_init (void)
/* The function is not being emitted, remove from list. */
*fn_prev = fn->next;
+ if (functions_head == NULL)
+ return false;
+
for (ix = 0; ix != GCOV_COUNTERS; ix++)
if ((1u << ix) & prg_ctr_mask)
n_counters++;
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index a0320c6401b8..152554dcfcda 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,12 @@
+2014-01-29 Markus Trippelsdorf <mar...@trippelsdorf.de>
+
+ Backport from mainline
+ 2012-12-13 Jakub Jelinek <ja...@redhat.com>
+
+ PR gcov-profile/55650
+ * g++.dg/other/pr55650.C: New test.
+ * g++.dg/other/pr55650.cc: New file.
+
2014-01-26 Mikael Morin <mik...@gcc.gnu.org>
PR fortran/58007
diff --git a/gcc/testsuite/g++.dg/other/pr55650.C
b/gcc/testsuite/g++.dg/other/pr55650.C
new file mode 100644
index 000000000000..fc52b19f5d30
--- /dev/null
+++ b/gcc/testsuite/g++.dg/other/pr55650.C
@@ -0,0 +1,21 @@
+// PR gcov-profile/55650
+// { dg-do link }
+// { dg-options "-O2 -fprofile-generate" }
+// { dg-additional-sources "pr55650.cc" }
+
+struct A
+{
+ virtual void foo ();
+};
+
+struct B : public A
+{
+ B ();
+ void foo () {}
+};
+
+inline A *
+bar ()
+{
+ return new B;
+}
diff --git a/gcc/testsuite/g++.dg/other/pr55650.cc
b/gcc/testsuite/g++.dg/other/pr55650.cc
new file mode 100644
index 000000000000..70b41462b57e
--- /dev/null
+++ b/gcc/testsuite/g++.dg/other/pr55650.cc
@@ -0,0 +1,4 @@
+int
+main ()
+{
+}
--
Markus
