Do not inline variadic thunks (PR ipa/83549).

2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83549
	* cif-code.def (VARIADIC_THUNK): New enum value.
	* ipa-fnsummary.c (compute_fn_summary): Do not inline variadic
	thunks.
2018-01-03  Martin Liska  <mliska@suse.cz>

	PR ipa/83549
	* g++.dg/ipa/pr83549.C: New test.

From-SVN: r256177

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d9c4c6a..ad327b9 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-01-03  Martin Liska  <mliska@suse.cz>
+
+       PR ipa/83549
+       * cif-code.def (VARIADIC_THUNK): New enum value.
+       * ipa-fnsummary.c (compute_fn_summary): Do not inline variadic
+       thunks.
+
 2018-01-03  Jan Beulich  <jbeulich@suse.com>
 
        * sse.md (mov<mode>_internal): Tighten condition for when to use

diff --git a/gcc/cif-code.def b/gcc/cif-code.def
index 6d7e2b4..19a7621 100644 (file)
--- a/gcc/cif-code.def
+++ b/gcc/cif-code.def
@@ -95,6 +95,10 @@ DEFCIFCODE(MISMATCHED_ARGUMENTS, CIF_FINAL_ERROR,
 DEFCIFCODE(LTO_MISMATCHED_DECLARATIONS, CIF_FINAL_ERROR,
           N_("mismatched declarations during linktime optimization"))
 
+/* Caller is variadic thunk.  */
+DEFCIFCODE(VARIADIC_THUNK, CIF_FINAL_ERROR,
+          N_("variadic thunk call"))
+
 /* Call was originally indirect.  */
 DEFCIFCODE(ORIGINALLY_INDIRECT_CALL, CIF_FINAL_NORMAL,
           N_("originally indirect function call not considered for inlining"))

diff --git a/gcc/ipa-fnsummary.c b/gcc/ipa-fnsummary.c
index fc18518..e9f76d5 100644 (file)
--- a/gcc/ipa-fnsummary.c
+++ b/gcc/ipa-fnsummary.c
@@ -2422,6 +2422,11 @@ compute_fn_summary (struct cgraph_node *node, bool early)
           info->inlinable = false;
           node->callees->inline_failed = CIF_CHKP;
        }
+      else if (stdarg_p (TREE_TYPE (node->decl)))
+       {
+         info->inlinable = false;
+         node->callees->inline_failed = CIF_VARIADIC_THUNK;
+       }
       else
         info->inlinable = true;
     }

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index d4d3804..969ce39 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-03  Martin Liska  <mliska@suse.cz>
+
+       PR ipa/83549
+       * g++.dg/ipa/pr83549.C: New test.
+
 2018-01-03  Marek Polacek  <polacek@redhat.com>
 
        PR c++/83592

diff --git a/gcc/testsuite/g++.dg/ipa/pr83549.C b/gcc/testsuite/g++.dg/ipa/pr83549.C
new file mode 100644 (file)
index 0000000..90cf8fe
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ipa/pr83549.C
@@ -0,0 +1,8 @@
+// PR ipa/83549
+// { dg-do compile }
+// { dg-options "-O2" }
+
+struct A { virtual ~A (); };
+struct B { virtual void foo (...); };
+struct C : A, B { void foo (...) {} };
+C c;