cdb42a4cc4
D96109 added support for unique internal linkage names for both internal linkage functions and global variables. There was a lot of discussion on how to get the demangling right for functions but I completely missed the point that demanglers do not support suffixes for global vars. For example: $ c++filt _ZL3foo foo $ c++filt _ZL3foo.uniq.123 _ZL3foo.uniq.123 The demangling for functions works as expected. I am not sure of the impact of this. I don't understand how debuggers and other tools depend on the correctness of global variable demangling so I am pre-emptively disabling it until we can get the demangling support added. Importantly, uniquefying global variables is not needed right now as we do not do profile attribution to global vars based on sampling. It was added for completeness and so this feature is not exactly missed. Differential Revision: https://reviews.llvm.org/D98392
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
// This test checks if internal linkage symbols get unique names with
|
|
// -funique-internal-linkage-names option.
|
|
// RUN: %clang_cc1 -triple x86_64 -x c++ -S -emit-llvm -o - < %s | FileCheck %s --check-prefix=PLAIN
|
|
// RUN: %clang_cc1 -triple x86_64 -x c++ -S -emit-llvm -funique-internal-linkage-names -o - < %s | FileCheck %s --check-prefix=UNIQUE
|
|
|
|
static int glob;
|
|
static int foo() {
|
|
return 0;
|
|
}
|
|
|
|
int (*bar())() {
|
|
return foo;
|
|
}
|
|
|
|
int getGlob() {
|
|
return glob;
|
|
}
|
|
|
|
// Function local static variable and anonymous namespace namespace variable.
|
|
namespace {
|
|
int anon_m;
|
|
int getM() {
|
|
return anon_m;
|
|
}
|
|
} // namespace
|
|
|
|
int retAnonM() {
|
|
static int fGlob;
|
|
return getM() + fGlob;
|
|
}
|
|
|
|
// Multiversioning symbols
|
|
__attribute__((target("default"))) static int mver() {
|
|
return 0;
|
|
}
|
|
|
|
__attribute__((target("sse4.2"))) static int mver() {
|
|
return 1;
|
|
}
|
|
|
|
int mver_call() {
|
|
return mver();
|
|
}
|
|
|
|
// PLAIN: @_ZL4glob = internal global
|
|
// PLAIN: @_ZZ8retAnonMvE5fGlob = internal global
|
|
// PLAIN: @_ZN12_GLOBAL__N_16anon_mE = internal global
|
|
// PLAIN: define internal i32 @_ZL3foov()
|
|
// PLAIN: define internal i32 @_ZN12_GLOBAL__N_14getMEv
|
|
// PLAIN: define weak_odr i32 ()* @_ZL4mverv.resolver()
|
|
// PLAIN: define internal i32 @_ZL4mverv()
|
|
// PLAIN: define internal i32 @_ZL4mverv.sse4.2()
|
|
// PLAIN-NOT: "sample-profile-suffix-elision-policy"
|
|
// UNIQUE: @_ZL4glob = internal global
|
|
// UNIQUE: @_ZZ8retAnonMvE5fGlob = internal global
|
|
// UNIQUE: @_ZN12_GLOBAL__N_16anon_mE = internal global
|
|
// UNIQUE: define internal i32 @_ZL3foov.[[MODHASH:__uniq.[0-9]+]]() #[[#ATTR:]] {
|
|
// UNIQUE: define internal i32 @_ZN12_GLOBAL__N_14getMEv.[[MODHASH]]
|
|
// UNIQUE: define weak_odr i32 ()* @_ZL4mverv.[[MODHASH]].resolver()
|
|
// UNIQUE: define internal i32 @_ZL4mverv.[[MODHASH]]()
|
|
// UNIQUE: define internal i32 @_ZL4mverv.[[MODHASH]].sse4.2
|
|
// UNIQUE: attributes #[[#ATTR]] = { {{.*}}"sample-profile-suffix-elision-policy"{{.*}} }
|