const TargetLoweringObjectFile &Obj = getObjFileLowering();
const MCSymbol *KeySym = nullptr;
const MCSection *KeySec = nullptr;
- if (S.ComdatKey) {
- KeySym = getSymbol(S.ComdatKey);
- KeySec = getObjFileLowering().SectionForGlobal(S.ComdatKey, *Mang, TM);
+ if (GlobalValue *GV = S.ComdatKey) {
+ if (GV->hasAvailableExternallyLinkage())
+ // If the associated variable is available_externally, some other TU
+ // will provide its dynamic initializer.
+ continue;
+
+ KeySym = getSymbol(GV);
+ KeySec = getObjFileLowering().SectionForGlobal(GV, *Mang, TM);
}
const MCSection *OutputSection =
(isCtor ? Obj.getStaticCtorSection(S.Priority, KeySym, KeySec)
%ini = type { i32, void()*, i8* }
-@llvm.global_ctors = appending global [2 x %ini ] [
+@llvm.global_ctors = appending global [3 x %ini ] [
%ini { i32 65535, void ()* @a_global_ctor, i8* null },
- %ini { i32 65535, void ()* @b_global_ctor, i8* bitcast (i32* @b to i8*) }
+ %ini { i32 65535, void ()* @b_global_ctor, i8* bitcast (i32* @b to i8*) },
+ %ini { i32 65535, void ()* @c_global_ctor, i8* bitcast (i32* @c to i8*) }
]
@llvm.global_dtors = appending global [1 x %ini ] [%ini { i32 65535, void ()* @a_global_dtor, i8* null }]
@b = global i32 zeroinitializer
+@c = available_externally dllimport global i32 zeroinitializer
+
define void @b_global_ctor() nounwind {
store i32 42, i32* @b
ret void
}
+define void @c_global_ctor() nounwind {
+ store i32 42, i32* @c
+ ret void
+}
+
define void @a_global_dtor() nounwind {
%1 = call i32 @puts(i8* getelementptr inbounds ([12 x i8]* @.str2, i32 0, i32 0))
ret void
; WIN32: a_global_ctor
; WIN32: .section .CRT$XCU,"rd",associative .bss,{{_?}}b
; WIN32: b_global_ctor
+; WIN32-NOT: c_global_ctor
; WIN32: .section .CRT$XTX,"rd"
; WIN32: a_global_dtor
; MINGW32: .section .ctors,"wd"
; MINGW32: a_global_ctor
; MINGW32: .section .ctors,"wd",associative .bss,{{_?}}b
; MINGW32: b_global_ctor
+; MINGW32-NOT: c_global_ctor
; MINGW32: .section .dtors,"wd"
; MINGW32: a_global_dtor