Tested x86_64-pc-linux-gnu, OK for trunk? 14.2?
This two-year-old thread seems relevant:
https://gcc.gnu.org/pipermail/gcc-patches/2022-April/593410.html
-- 8< --
#pragma target and optimize should also apply to implicitly-generated
functions like static initialization functions and defaulted special
member
functions.
At least one of the create_same_body_alias/handle_optimize_attribute
changes
is necessary to avoid regressing g++.dg/opt/pr105306.C; maybe_clone_body
creates a cgraph_node for the ~B alias before
handle_optimize_attribute, and
the alias never goes through finalize_function, so we need to adjust
semantic_interposition somewhere else.
PR c++/109753
gcc/ChangeLog:
* cgraph.cc (cgraph_node::create_same_body_alias): Set
semantic_interposition.
gcc/c-family/ChangeLog:
* c-attribs.cc (handle_optimize_attribute): Set
cgraph_node::semantic_interposition.
gcc/cp/ChangeLog:
* decl.cc (start_preparsed_function): Call decl_attributes.
gcc/testsuite/ChangeLog:
* g++.dg/opt/always_inline1.C: New test.
---
gcc/c-family/c-attribs.cc | 4 ++++
gcc/cgraph.cc | 2 ++
gcc/cp/decl.cc | 3 +++
gcc/testsuite/g++.dg/opt/always_inline1.C | 8 ++++++++
4 files changed, 17 insertions(+)
create mode 100644 gcc/testsuite/g++.dg/opt/always_inline1.C
diff --git a/gcc/c-family/c-attribs.cc b/gcc/c-family/c-attribs.cc
index 04e39b41bdf..605469dd7dd 100644
--- a/gcc/c-family/c-attribs.cc
+++ b/gcc/c-family/c-attribs.cc
@@ -5971,6 +5971,10 @@ handle_optimize_attribute (tree *node, tree
name, tree args,
if (prev_target_node != target_node)
DECL_FUNCTION_SPECIFIC_TARGET (*node) = target_node;
+ /* Also update the cgraph_node, if it's already built. */
+ if (cgraph_node *cn = cgraph_node::get (*node))
+ cn->semantic_interposition = flag_semantic_interposition;
+
/* Restore current options. */
cl_optimization_restore (&global_options, &global_options_set,
&cur_opts);
diff --git a/gcc/cgraph.cc b/gcc/cgraph.cc
index 473d8410bc9..f3bd2fa8ece 100644
--- a/gcc/cgraph.cc
+++ b/gcc/cgraph.cc
@@ -604,6 +604,8 @@ cgraph_node::create_same_body_alias (tree alias,
tree decl)
n = cgraph_node::create_alias (alias, decl);
n->cpp_implicit_alias = true;
+ /* Aliases don't go through finalize_function. */
+ n->semantic_interposition = opt_for_fn (decl,
flag_semantic_interposition);
if (symtab->cpp_implicit_aliases_done)
n->resolve_alias (cgraph_node::get (decl));
return n;
diff --git a/gcc/cp/decl.cc b/gcc/cp/decl.cc
index 378311c0f04..4531d830462 100644
--- a/gcc/cp/decl.cc
+++ b/gcc/cp/decl.cc
@@ -17796,6 +17796,9 @@ start_preparsed_function (tree decl1, tree
attrs, int flags)
doing_friend = true;
}
+ /* Adjust for #pragma target/optimize. */
+ decl_attributes (&decl1, NULL_TREE, 0);
+
if (DECL_DECLARED_INLINE_P (decl1)
&& lookup_attribute ("noinline", attrs))
warning_at (DECL_SOURCE_LOCATION (decl1), 0,
diff --git a/gcc/testsuite/g++.dg/opt/always_inline1.C
b/gcc/testsuite/g++.dg/opt/always_inline1.C
new file mode 100644
index 00000000000..a042a1cf0c6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/always_inline1.C
@@ -0,0 +1,8 @@
+// PR c++/109753
+// { dg-do compile { target x86_64-*-* } }
+
+#pragma GCC target("avx2")
+struct aa {
+ __attribute__((__always_inline__)) aa() {}
+};
+aa _M_impl;
base-commit: 2f15787f2e1a3afe2c2ad93d4eb0d3c1f73c8fbd
