[PATCH] inline: do not inline when no_profile_instrument_function is different

[Martin Liška]

Hello.

Similarly to e.g. sanitizer attributes, we sould prevent inlining when one function
is marked as not instrumented. We should do that with -fprofile-generate only.

Patch can bootstrap on x86_64-linux-gnu and survives regression tests.

Ready to be installed?
Thanks,
Martin

Adds test-case for:
	PR gcov-profile/80223

gcc/ChangeLog:

	* ipa-inline.c (can_inline_edge_p): Similarly to sanitizer
	options, do not inline when no_profile_instrument_function
	attributes are different.

gcc/testsuite/ChangeLog:

	* gcc.dg/no_profile_instrument_function-attr-2.c: New test.
---
  gcc/ipa-inline.c                                  | 10 ++++++++++
  .../no_profile_instrument_function-attr-2.c       | 15 +++++++++++++++
  2 files changed, 25 insertions(+)
  create mode 100644 gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-2.c

diff --git a/gcc/ipa-inline.c b/gcc/ipa-inline.c
index 9d896beb2ac..786ab2e7f7f 100644
--- a/gcc/ipa-inline.c
+++ b/gcc/ipa-inline.c
@@ -396,6 +396,16 @@ can_inline_edge_p (struct cgraph_edge *e, bool report,
        e->inline_failed = CIF_SANITIZE_ATTRIBUTE_MISMATCH;
        inlinable = false;
      }
+  else if (profile_arc_flag
+	   && lookup_attribute ("no_profile_instrument_function",
+				DECL_ATTRIBUTES (caller->decl))
+	      != lookup_attribute ("no_profile_instrument_function",
+				   DECL_ATTRIBUTES (callee->decl)))
+    {
+      e->inline_failed = CIF_UNSPECIFIED;
+      inlinable = false;
+    }
+
    if (!inlinable && report)
      report_inline_failed_reason (e);
    return inlinable;
diff --git a/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-2.c b/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-2.c
new file mode 100644
index 00000000000..586962a1c76
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/no_profile_instrument_function-attr-2.c
@@ -0,0 +1,15 @@
+/* { dg-require-effective-target global_constructor } */
+/* { dg-options "-O2 -fprofile-generate -fprofile-update=single -fdump-tree-optimized" } */
+
+__attribute__ ((no_profile_instrument_function))
+int foo()
+{
+  return 0;
+}
+
+int bar()
+{
+  return foo();
+}
+
+/* { dg-final { scan-tree-dump-times " = foo \\(\\)" 1 "optimized"} } */
-- 
2.32.0