re PR target/32277 (indir-call-prof fails on ia64-linux-gnu)

	PR target/32277
	* libgcov.c ( __gcov_indirect_call_profiler): Check
	TARGET_VTABLE_USES_DESCRIPTORS.

From-SVN: r141442

gcc/ChangeLog

+2008-10-29  Steve Ellcey  <sje@cup.hp.com>
+
+	PR target/32277
+	* libgcov.c ( __gcov_indirect_call_profiler): Check
+	TARGET_VTABLE_USES_DESCRIPTORS.
+
 2008-10-29  Stefan Schulze Frielinghaus  <xxschulz@de.ibm.com>
 
 	* config/spu/spu.h (FRAME_GROWS_DOWNWARD): Define.

gcc/libgcov.c

@@ -777,7 +777,12 @@ void
 __gcov_indirect_call_profiler (gcov_type* counter, gcov_type value, 
 			       void* cur_func, void* callee_func)
 {
-  if (cur_func == callee_func)
+  /* If the C++ virtual tables contain function descriptors then one
+     function may have multiple descriptors and we need to dereference
+     the descriptors to see if they point to the same function.  */
+  if (cur_func == callee_func
+      || (TARGET_VTABLE_USES_DESCRIPTORS && callee_func
+	  && *(void **) cur_func == *(void **) callee_func))
     __gcov_one_value_profiler_body (counter, value);
 }
 #endif