thinlto_weak_resolution.ll
3.61 KB
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; RUN: opt -module-summary %s -o %t.o
; RUN: opt -module-summary %p/Inputs/thinlto_weak_resolution.ll -o %t2.o
; Verify that prevailing weak for linker symbol is kept.
; Note that gold picks the first copy of a function as the prevailing one,
; so listing %t.o first is sufficient to ensure that its copies are prevailing.
; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold%shlibext \
; RUN: --plugin-opt=thinlto \
; RUN: --plugin-opt=save-temps \
; RUN: -shared \
; RUN: -o %t3.o %t.o %t2.o
; RUN: llvm-nm %t3.o | FileCheck %s
; CHECK: weakfunc
; The preempted functions should have been eliminated (the plugin will
; set linkage of odr functions to available_externally, and convert
; linkonce and weak to declarations).
; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck --check-prefix=OPT2 %s
; OPT2-NOT: @
; RUN: llvm-dis %t.o.3.import.bc -o - | FileCheck --check-prefix=IMPORT %s
; RUN: llvm-dis %t2.o.3.import.bc -o - | FileCheck --check-prefix=IMPORT2 %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define i32 @main() #0 {
entry:
call void @linkonceodralias()
call void @linkoncealias()
call void @linkonceodrfuncwithalias()
call void @linkoncefuncwithalias()
call void @linkonceodrfunc()
call void @linkoncefunc()
call void @weakodrfunc()
call void @weakfunc()
call void @linkonceodrfuncInSingleModule()
ret i32 0
}
; Alias are resolved to weak_odr in prevailing module, but left as linkonce_odr
; in non-prevailing module (illegal to have an available_externally alias).
; IMPORT: @linkonceodralias = weak_odr alias void (), void ()* @linkonceodrfuncwithalias
; IMPORT2: @linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
@linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
; Alias are resolved in prevailing module, but not optimized in
; non-prevailing module (illegal to have an available_externally alias).
; IMPORT: @linkoncealias = weak alias void (), void ()* @linkoncefuncwithalias
; IMPORT2: @linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
@linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
; Function with an alias are resolved in prevailing module, but
; not optimized in non-prevailing module (illegal to have an
; available_externally aliasee).
; IMPORT: define weak_odr void @linkonceodrfuncwithalias()
; IMPORT2: define linkonce_odr void @linkonceodrfuncwithalias()
define linkonce_odr void @linkonceodrfuncwithalias() #0 {
entry:
ret void
}
; Function with an alias are resolved to weak in prevailing module, but
; not optimized in non-prevailing module (illegal to have an
; available_externally aliasee).
; IMPORT: define weak void @linkoncefuncwithalias()
; IMPORT2: define linkonce void @linkoncefuncwithalias()
define linkonce void @linkoncefuncwithalias() #0 {
entry:
ret void
}
; IMPORT: define weak_odr void @linkonceodrfunc()
; IMPORT2: define available_externally void @linkonceodrfunc()
define linkonce_odr void @linkonceodrfunc() #0 {
entry:
ret void
}
; IMPORT: define weak void @linkoncefunc()
; IMPORT2: declare void @linkoncefunc()
define linkonce void @linkoncefunc() #0 {
entry:
ret void
}
; IMPORT: define weak_odr void @weakodrfunc()
; IMPORT2: define available_externally void @weakodrfunc()
define weak_odr void @weakodrfunc() #0 {
entry:
ret void
}
; IMPORT: define weak void @weakfunc()
; IMPORT2: declare void @weakfunc()
define weak void @weakfunc() #0 {
entry:
ret void
}
; IMPORT: weak_odr void @linkonceodrfuncInSingleModule()
define linkonce_odr void @linkonceodrfuncInSingleModule() #0 {
entry:
ret void
}