Include translation unit filename in global ctor symbol names.

This makes it easier to see where a global ctor comes from, and it also makes
ASan's init order analyzer output easier to understand.  gcc does this too,
but only in -fPIC mode for some reason.  Don't do this for constructors with
explicit init priority.

Also prepend "sub_" before the 'I', that way regular constructors stay
lexicographically after symbols with init priority (because
ord('s') > ord('I')).  gold seems to ignore the name of constructor symbols,
and ld only looks at the symbol if it includes an init priority, which this
patch doesn't change.

Before: __GLOBAL_I_a
Now: __GLOBAL_sub_I_myfile.cc
llvm-svn: 208128

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/test/CodeGenCXX/static-member-variable-explicit-specialization.cpp b/clang/test/CodeGenCXX/static-member-variable-explicit-specialization.cpp
index 50772bf..4ba8a37 100644
--- a/clang/test/CodeGenCXX/static-member-variable-explicit-specialization.cpp
+++ b/clang/test/CodeGenCXX/static-member-variable-explicit-specialization.cpp
@@ -19,14 +19,14 @@ template<> int A<bool>::a = 10;
 // CHECK:  { i32, void ()* } { i32 65535, void ()* @[[unordered4:[^ ]*]] },
 // CHECK:  { i32, void ()* } { i32 65535, void ()* @[[unordered5:[^ ]*]] },
 // CHECK:  { i32, void ()* } { i32 65535, void ()* @[[unordered6:[^ ]*]] },
-// CHECK:  { i32, void ()* } { i32 65535, void ()* @_GLOBAL__I_a }]
+// CHECK:  { i32, void ()* } { i32 65535, void ()* @_GLOBAL__sub_I_static_member_variable_explicit_specialization.cpp }]
 
 template int A<short>::a;  // Unordered
 int b = foo();
 int c = foo();
 int d = A<void>::a; // Unordered
 
-// An explicit specialization is ordered, and goes in __GLOBAL_I_a.
+// An explicit specialization is ordered, and goes in __GLOBAL_sub_I_static_member_variable_explicit_specialization.cpp.
 template<> struct A<int> { static int a; };
 int A<int>::a = foo();
 
@@ -82,7 +82,7 @@ template int b::i<int>;
 // CHECK: store {{.*}} @_Z1xIcE
 // CHECK: ret
 
-// CHECK: define internal void @_GLOBAL__I_a()
+// CHECK: define internal void @_GLOBAL__sub_I_static_member_variable_explicit_specialization.cpp()
 //   We call unique stubs for every ordered dynamic initializer in the TU.
 // CHECK: call
 // CHECK: call