This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
C++ PATCH for c++/56177 ( ICE with return type deduction)
- From: Jason Merrill <jason at redhat dot com>
- To: gcc-patches List <gcc-patches at gcc dot gnu dot org>
- Date: Tue, 05 Feb 2013 22:29:28 -0500
- Subject: C++ PATCH for c++/56177 ( ICE with return type deduction)
When we start processing a function and find that it was declared
previously, we use the old declaration. In that case we should use the
old version of the return type, as well.
Tested x86_64-pc-linux-gnu, applying to trunk.
commit 3589139ea249533cc5ebb5ef9c38d72fc159f6fd
Author: Jason Merrill <jason@redhat.com>
Date: Tue Feb 5 14:40:56 2013 -0500
PR c++/56177
* decl.c (start_preparsed_function): Update restype if we change
decl1.
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 9b40018..cfee0f8 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -13116,6 +13116,7 @@ start_preparsed_function (tree decl1, tree attrs, int flags)
DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
}
fntype = TREE_TYPE (decl1);
+ restype = TREE_TYPE (fntype);
/* If #pragma weak applies, mark the decl appropriately now.
The pragma only applies to global functions. Because
diff --git a/gcc/testsuite/g++.dg/cpp1y/auto-fn14.C b/gcc/testsuite/g++.dg/cpp1y/auto-fn14.C
new file mode 100644
index 0000000..e7e8699
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1y/auto-fn14.C
@@ -0,0 +1,5 @@
+// PR c++/56177
+// { dg-options "-std=c++1y" }
+
+auto f ();
+auto f () { return 33; }