| // RUN: %clang -cc1 -triple x86_64-unknown-unknown %s -debug-info-kind=limited -fdynamic-debugging -o %t \ |
| // RUN: -emit-llvm --save-dynamic-debugging-temps --discard-dynamic-debugging-debug-module |
| // RUN: FileCheck %s --check-prefix=OUTER < %t.dyndbg.2.outer.ll |
| |
| // Test discardable symbols are added to the @llvm.compiler.used global, |
| // which prevents them being discarded (including by globalopt replacing) them |
| // with their external linkage aliases. |
| |
| // OUTER: @llvm.compiler.used = appending global [[[#]] x ptr] |
| // OUTER-SAME: [ |
| // OUTER-SAME: ptr @__cxx_global_var_init, |
| // OUTER-SAME: ptr @_ZL12internal_funv, |
| // OUTER-SAME: ptr @_Z14internal_fun_2v, |
| // OUTER-SAME: ptr @_GLOBAL__sub_I_compiler_used.cpp, |
| // OUTER-SAME: ptr @_ZL12used_by_init, |
| // OUTER-SAME: ptr @odrweak, |
| // OUTER-SAME: ptr @_ZL8internal, |
| // OUTER-SAME: ptr @_ZZ14internal_fun_2vE8internal |
| // OUTER-SAME: ], |
| // OUTER-SAME: section "llvm.metadata" |
| |
| // 'external' has external linkage; it's not discardable if unused, so it |
| // doesn't need to be added to compiler-used. |
| int external = 1; |
| // 'odrweak' and 'internal' are both discardable and may be only referenced |
| // from the inner module, so we must keep them. |
| inline int odrweak = 2; |
| static int internal = 1; |
| // 'unused_internal' has internal linkage and is unused so we don't need to |
| // preserve it (it isn't referenced by the outer or inner module). |
| static int internal_fun() { static int unused_internal = 0; return 0; } |
| inline int internal_fun_2() { static int internal = 0; return internal; } |
| |
| // Use those globals so they're not omitted by Clang. Don't use [[gnu::used]] |
| // because that populates the compiler-used global. This global itself is |
| // unused in user code but it _is_ used in __cxx_global_var_init. |
| static int used_by_init = external + odrweak + internal + internal_fun() + internal_fun_2(); |
