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* [gcc r11-4798] c++: Propagate attributes to clones in duplicate_decls [PR67453]
@ 2020-11-06 19:35 Jakub Jelinek
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From: Jakub Jelinek @ 2020-11-06 19:35 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:6c282c14d1be0bba2bf5d49acd074b349f28ad17
commit r11-4798-g6c282c14d1be0bba2bf5d49acd074b349f28ad17
Author: Jakub Jelinek <jakub@redhat.com>
Date: Fri Nov 6 20:33:39 2020 +0100
c++: Propagate attributes to clones in duplicate_decls [PR67453]
On the following testcase where the cdtor attributes aren't on the
in-class declaration but on an out-of-class definition, the cdtors
have their clones created from the in-class declaration, and later on
duplicate_decls updates attributes on the abstract cdtors, but nothing
propagates them to the clones.
2020-11-06 Jakub Jelinek <jakub@redhat.com>
PR c++/67453
* decl.c (duplicate_decls): Propagate DECL_ATTRIBUTES and
DECL_PRESERVE_P from olddecl to its clones if any.
* g++.dg/ext/attr-used-2.C: New test.
Diff:
---
gcc/cp/decl.c | 10 ++++++++++
gcc/testsuite/g++.dg/ext/attr-used-2.C | 15 +++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 56bd772d01d..62648841ac3 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -2921,6 +2921,16 @@ duplicate_decls (tree newdecl, tree olddecl, bool hiding, bool was_hidden)
snode->remove ();
}
+ if (TREE_CODE (olddecl) == FUNCTION_DECL)
+ {
+ tree clone;
+ FOR_EACH_CLONE (clone, olddecl)
+ {
+ DECL_ATTRIBUTES (clone) = DECL_ATTRIBUTES (olddecl);
+ DECL_PRESERVE_P (clone) |= DECL_PRESERVE_P (olddecl);
+ }
+ }
+
/* Remove the associated constraints for newdecl, if any, before
reclaiming memory. */
if (flag_concepts)
diff --git a/gcc/testsuite/g++.dg/ext/attr-used-2.C b/gcc/testsuite/g++.dg/ext/attr-used-2.C
new file mode 100644
index 00000000000..d7cf6e975bd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/ext/attr-used-2.C
@@ -0,0 +1,15 @@
+// PR c++/67453
+// { dg-do compile }
+// { dg-final { scan-assembler "_ZN1SC\[12]Ev" } }
+// { dg-final { scan-assembler "_ZN1SD\[12]Ev" } }
+// { dg-final { scan-assembler "_ZN1SC\[12]ERKS_" } }
+
+struct S {
+ S();
+ ~S();
+ S(const S&);
+};
+
+__attribute__((used)) inline S::S() { }
+__attribute__((used)) inline S::~S() { }
+__attribute__((used)) inline S::S(const S&) { }
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