[gcc(refs/vendors/redhat/heads/gcc-10-branch)] Support gnu_unique_object symbols on MIPS.

[Jakub Jelinek]

https://gcc.gnu.org/g:15d552394e1cb94598eef278ff3d9e9876097b33

commit 15d552394e1cb94598eef278ff3d9e9876097b33
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Mon Jan 27 22:00:52 2020 +0000

    Support gnu_unique_object symbols on MIPS.
    
    mips_declare_object_name is missing the support for declaring symbols
    as gnu_unique_object that is present in the generic
    ASM_DECLARE_OBJECT_NAME in elfos.h.  I'm not aware of any
    MIPS-specific reason for that support to be absent;
    mips_declare_object_name predates the addition of gnu_unique_object
    support and as far as I can tell this was simply an oversight when
    that support was added.  This patch adds the missing support,
    following the code in elfos.h.
    
    Tested with no regressions with cross to mips-linux-gnu.  In
    particular, this fixes the failure of the recently-added glibc test
    elf/tst-dlopen-nodelete-reloc, which relies on the compiler generating
    such symbols, for MIPS.
    
    	* config/mips/mips.c (mips_declare_object_name)
    	[USE_GNU_UNIQUE_OBJECT]: Support use of gnu_unique_object.

Diff:
---
 gcc/ChangeLog          | 5 +++++
 gcc/config/mips/mips.c | 9 ++++++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b3624b1..af0945f 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2020-01-27  Joseph Myers  <joseph@codesourcery.com>
+
+	* config/mips/mips.c (mips_declare_object_name)
+	[USE_GNU_UNIQUE_OBJECT]: Support use of gnu_unique_object.
+
 2020-01-27  Martin Liska  <mliska@suse.cz>
 
 	PR gcov-profile/93403
diff --git a/gcc/config/mips/mips.c b/gcc/config/mips/mips.c
index dae189e..513fc5f 100644
--- a/gcc/config/mips/mips.c
+++ b/gcc/config/mips/mips.c
@@ -9775,7 +9775,14 @@ mips_declare_object_name (FILE *stream, const char *name,
 			  tree decl ATTRIBUTE_UNUSED)
 {
 #ifdef ASM_OUTPUT_TYPE_DIRECTIVE
-  ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "object");
+#ifdef USE_GNU_UNIQUE_OBJECT
+  /* As in elfos.h.  */
+  if (USE_GNU_UNIQUE_OBJECT && DECL_ONE_ONLY (decl)
+      && (!DECL_ARTIFICIAL (decl) || !TREE_READONLY (decl)))
+    ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "gnu_unique_object");
+  else
+#endif
+    ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "object");
 #endif
 
   size_directive_output = 0;