test cases: adjust symbol/visibility tests to work with gcc -O2

These cases are tweaked to avoid triggering a GCC bug where optimisation
destroys some debug information.

It suffices to ensure that all the functions compile to different code.

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112372

PiperOrigin-RevId: 582002042
Change-Id: I5f62199967b6bc4dfd8b7c2fea7d9c467961428d

6 files changed, 30 insertions, 24 deletions

diff --git a/test_cases/diff_tests/symbol/visibility.0.c b/test_cases/diff_tests/symbol/visibility.0.c
index 4635616..596b55a 100644
--- a/test_cases/diff_tests/symbol/visibility.0.c
+++ b/test_cases/diff_tests/symbol/visibility.0.c
@@ -1,4 +1,5 @@
-void a() { }
-void b() { }
-void c() { }
-void d() { }
+void tweak(int);
+void a() { tweak(0); }
+void b() { tweak(1); }
+void c() { tweak(2); }
+void d() { tweak(3); }
diff --git a/test_cases/diff_tests/symbol/visibility.0.cc b/test_cases/diff_tests/symbol/visibility.0.cc
index 4635616..596b55a 100644
--- a/test_cases/diff_tests/symbol/visibility.0.cc
+++ b/test_cases/diff_tests/symbol/visibility.0.cc
@@ -1,4 +1,5 @@
-void a() { }
-void b() { }
-void c() { }
-void d() { }
+void tweak(int);
+void a() { tweak(0); }
+void b() { tweak(1); }
+void c() { tweak(2); }
+void d() { tweak(3); }
diff --git a/test_cases/diff_tests/symbol/visibility.1.c b/test_cases/diff_tests/symbol/visibility.1.c
index fe93486..45fcbb5 100644
--- a/test_cases/diff_tests/symbol/visibility.1.c
+++ b/test_cases/diff_tests/symbol/visibility.1.c
@@ -1,4 +1,5 @@
-__attribute__ ((visibility ("default"))) void a() { }
-__attribute__ ((visibility ("protected"))) void b() { }
-__attribute__ ((visibility ("hidden"))) void c() { }
-__attribute__ ((visibility ("internal"))) void d() { }
+void tweak(int);
+__attribute__ ((visibility ("default"))) void a() { tweak(0); }
+__attribute__ ((visibility ("protected"))) void b() { tweak(1); }
+__attribute__ ((visibility ("hidden"))) void c() { tweak(2); }
+__attribute__ ((visibility ("internal"))) void d() { tweak(3); }
diff --git a/test_cases/diff_tests/symbol/visibility.1.cc b/test_cases/diff_tests/symbol/visibility.1.cc
index fe93486..45fcbb5 100644
--- a/test_cases/diff_tests/symbol/visibility.1.cc
+++ b/test_cases/diff_tests/symbol/visibility.1.cc
@@ -1,4 +1,5 @@
-__attribute__ ((visibility ("default"))) void a() { }
-__attribute__ ((visibility ("protected"))) void b() { }
-__attribute__ ((visibility ("hidden"))) void c() { }
-__attribute__ ((visibility ("internal"))) void d() { }
+void tweak(int);
+__attribute__ ((visibility ("default"))) void a() { tweak(0); }
+__attribute__ ((visibility ("protected"))) void b() { tweak(1); }
+__attribute__ ((visibility ("hidden"))) void c() { tweak(2); }
+__attribute__ ((visibility ("internal"))) void d() { tweak(3); }
diff --git a/test_cases/info_tests/symbol/visibility.c b/test_cases/info_tests/symbol/visibility.c
index fe93486..45fcbb5 100644
--- a/test_cases/info_tests/symbol/visibility.c
+++ b/test_cases/info_tests/symbol/visibility.c
@@ -1,4 +1,5 @@
-__attribute__ ((visibility ("default"))) void a() { }
-__attribute__ ((visibility ("protected"))) void b() { }
-__attribute__ ((visibility ("hidden"))) void c() { }
-__attribute__ ((visibility ("internal"))) void d() { }
+void tweak(int);
+__attribute__ ((visibility ("default"))) void a() { tweak(0); }
+__attribute__ ((visibility ("protected"))) void b() { tweak(1); }
+__attribute__ ((visibility ("hidden"))) void c() { tweak(2); }
+__attribute__ ((visibility ("internal"))) void d() { tweak(3); }
diff --git a/test_cases/info_tests/symbol/visibility.cc b/test_cases/info_tests/symbol/visibility.cc
index fe93486..45fcbb5 100644
--- a/test_cases/info_tests/symbol/visibility.cc
+++ b/test_cases/info_tests/symbol/visibility.cc
@@ -1,4 +1,5 @@
-__attribute__ ((visibility ("default"))) void a() { }
-__attribute__ ((visibility ("protected"))) void b() { }
-__attribute__ ((visibility ("hidden"))) void c() { }
-__attribute__ ((visibility ("internal"))) void d() { }
+void tweak(int);
+__attribute__ ((visibility ("default"))) void a() { tweak(0); }
+__attribute__ ((visibility ("protected"))) void b() { tweak(1); }
+__attribute__ ((visibility ("hidden"))) void c() { tweak(2); }
+__attribute__ ((visibility ("internal"))) void d() { tweak(3); }