re PR c++/86900 (-gdwarf-5 -O2 -ffunction-sections = assembler error)

	PR c++/86900
	* dwarf2out.c (secname_for_decl): For functions with
	DECL_SECTION_NAME if in_cold_section_p, try to return
	current_function_section's name if it is a named section.

	* g++.dg/debug/dwarf2/pr86900.C: New test.

From-SVN: r266485

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a4d60791c28be7492578fd9560d9f015797cf80f..42f2ff059e3f0616777780e32837100078bc1169 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2018-11-26  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/86900
+       * dwarf2out.c (secname_for_decl): For functions with
+       DECL_SECTION_NAME if in_cold_section_p, try to return
+       current_function_section's name if it is a named section.
+
 2018-11-26  Maya Rashish  <coypu@sdf.org>
 
        PR target/58397

diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 9933650e33be2d12d18b58a2729603983570b5a3..8b64c8769cd42bf08c663aa80062afed390588c8 100644 (file)
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -16742,7 +16742,15 @@ secname_for_decl (const_tree decl)
       && DECL_SECTION_NAME (decl))
     secname = DECL_SECTION_NAME (decl);
   else if (current_function_decl && DECL_SECTION_NAME (current_function_decl))
-    secname = DECL_SECTION_NAME (current_function_decl);
+    {
+      if (in_cold_section_p)
+       {
+         section *sec = current_function_section ();
+         if (sec->common.flags & SECTION_NAMED)
+           return sec->named.name;
+       }
+      secname = DECL_SECTION_NAME (current_function_decl);
+    }
   else if (cfun && in_cold_section_p)
     secname = crtl->subsections.cold_section_label;
   else

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ef9ad1db55116c04c5542920e6326373f6ab0157..7d65607b138d31e107e87b012b62ff1afec13e75 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-11-26  Jakub Jelinek  <jakub@redhat.com>
+
+       PR c++/86900
+       * g++.dg/debug/dwarf2/pr86900.C: New test.
+
 2018-11-26  Jozef Lawrynowicz  <jozef.l@mittosystems.com>
 
        * gcc.c-torture/compile/20151204.c: Add dg-require-effective-target

diff --git a/gcc/testsuite/g++.dg/debug/dwarf2/pr86900.C b/gcc/testsuite/g++.dg/debug/dwarf2/pr86900.C
new file mode 100644 (file)
index 0000000..6250f06
--- /dev/null
+++ b/gcc/testsuite/g++.dg/debug/dwarf2/pr86900.C
@@ -0,0 +1,14 @@
+// PR c++/86900
+// { dg-do assemble { target function_sections } }
+// { dg-options "-O2 -gdwarf-5 -ffunction-sections" }
+
+struct A;
+struct B { B (A); };
+struct A { A (int); ~A (); };
+
+void
+foo (int x)
+{
+  A d(0);
+  B e(d);
+}