re PR tree-optimization/39799 (missing 'may be used uninitialized' warning)

	PR tree-optimization/39799
	* tree-inline.c (remap_ssa_name): Initialize variable only if
	SSA_NAME_OCCURS_IN_ABNORMAL_PHI.

testsuite/
	PR tree-optimization/39799
	* c-c++-common/uninit-17.c: New test.

From-SVN: r161605

gcc/ChangeLog

+2010-06-30  Bernd Schmidt  <bernds@codesourcery.com>
+
+	PR tree-optimization/39799
+	* tree-inline.c (remap_ssa_name): Initialize variable only if
+	SSA_NAME_OCCURS_IN_ABNORMAL_PHI.
+
 2010-06-30  Nathan Froyd  <froydnj@codesourcery.com>
 
 	* c-parser.c (c_parser_omp_for_loop): Use a VEC for for_block.

gcc/testsuite/ChangeLog

+2010-06-30  Bernd Schmidt  <bernds@codesourcery.com>
+
+	PR tree-optimization/39799
+	* c-c++-common/uninit-17.c: New test.
+
 2010-06-29  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libfortran/43298

gcc/testsuite/c-c++-common/uninit-17.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -Wuninitialized" } */
+
+inline int foo(int x)
+{
+  return x;
+}
+static void bar(int a, int *ptr)
+{
+  do
+  {
+    int b; /* { dg-message "note: 'b' was declared here" } */
+    if (b < 40) {
+      ptr[0] = b; /* { dg-warning "may be used uninitialized" } */
+    }
+    b += 1;
+    ptr++;
+  }
+  while (--a != 0);
+}
+void foobar(int a, int *ptr)
+{
+  bar(foo(a), ptr);
+}
+

gcc/tree-inline.c

@@ -234,6 +234,7 @@ remap_ssa_name (tree name, copy_body_data *id)
 	     regions of the CFG, but this is expensive to test.  */
 	  if (id->entry_bb
 	      && is_gimple_reg (SSA_NAME_VAR (name))
+	      && SSA_NAME_OCCURS_IN_ABNORMAL_PHI (name)
 	      && TREE_CODE (SSA_NAME_VAR (name)) != PARM_DECL
 	      && (id->entry_bb != EDGE_SUCC (ENTRY_BLOCK_PTR, 0)->dest
 		  || EDGE_COUNT (id->entry_bb->preds) != 1))