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0442bd0563
We currently do not touch a symbol's linkage in the case where a definition has a single copy. However, this code is effectively unnecessary: either the definition is not exported, in which case the internalize phase sets its linkage to internal, or it is exported, in which case we need to promote linkage to weak. Those two cases are already handled by existing code. I believe that the only real functional change here is in the case where we have a single definition which does not prevail (e.g. because the definition in a native object file prevails). In that case we now lower linkage to available_externally following the existing code path for that case. As a result we can remove the isExported function parameter from the thinLTOResolveWeakForLinkerInIndex function. Differential Revision: http://reviews.llvm.org/D21883 llvm-svn: 274784
208 lines
13 KiB
LLVM
208 lines
13 KiB
LLVM
; RUN: opt -module-summary %s -o %t1.bc
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; RUN: opt -module-summary %p/Inputs/alias_import.ll -o %t2.bc
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; RUN: llvm-lto -thinlto-action=thinlink -o %t.index.bc %t1.bc %t2.bc
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; RUN: llvm-lto -thinlto-action=promote -thinlto-index %t.index.bc %t2.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=PROMOTE
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; RUN: llvm-lto -thinlto-action=promote -thinlto-index %t.index.bc %t2.bc -o - | llvm-lto -thinlto-action=internalize -thinlto-index %t.index.bc -thinlto-module-id=%t2.bc - -o - | llvm-dis -o - | FileCheck %s --check-prefix=PROMOTE-INTERNALIZE
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; RUN: llvm-lto -thinlto-action=import -thinlto-index %t.index.bc %t1.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=IMPORT
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;
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; Alias can't point to "available_externally", so we can only import an alias
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; when we can import the aliasee with a linkage that won't be
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; available_externally, i.e linkOnceODR. (FIXME this limitation could be lifted)
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; PROMOTE-DAG: @globalfuncAlias = alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-DAG: @globalfuncWeakAlias = weak alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-DAG: @globalfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-DAG: @globalfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-DAG: @globalfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-DAG: @internalfuncAlias = alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-DAG: @internalfuncWeakAlias = weak alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-DAG: @internalfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-DAG: @internalfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-DAG: @internalfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-DAG: @linkoncefuncAlias = alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-DAG: @linkoncefuncWeakAlias = weak alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-DAG: @linkoncefuncLinkonceAlias = weak alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-DAG: @linkoncefuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-DAG: @linkoncefuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-DAG: @weakfuncAlias = alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-DAG: @weakfuncWeakAlias = weak alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-DAG: @weakfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-DAG: @weakfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-DAG: @weakfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-DAG: @weakODRfuncAlias = alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-DAG: @weakODRfuncWeakAlias = weak alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-DAG: @weakODRfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-DAG: @weakODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-DAG: @weakODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; Only alias to LinkonceODR aliasee can be imported
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; PROMOTE-DAG: @linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-DAG: @linkonceODRfuncWeakAlias = weak alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-DAG: @linkonceODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; Amongst these that are imported, check that we promote only linkonce->weak
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; PROMOTE-DAG: @linkonceODRfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-DAG: @linkonceODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; These will be imported, check the linkage/renaming after promotion
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; PROMOTE-DAG: define void @globalfunc()
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; PROMOTE-DAG: define hidden void @internalfunc.llvm.0()
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; PROMOTE-DAG: define linkonce_odr void @linkonceODRfunc()
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; PROMOTE-DAG: define weak_odr void @weakODRfunc()
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; PROMOTE-DAG: define linkonce void @linkoncefunc()
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; PROMOTE-DAG: define weak void @weakfunc()
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; On the import side now, verify that aliases to a linkonce_odr are imported, but the weak/linkonce (we can't inline them)
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; IMPORT-DAG: declare void @linkonceODRfuncWeakAlias
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; IMPORT-DAG: declare void @linkonceODRfuncLinkonceAlias
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; IMPORT-DAG: @linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; IMPORT-DAG: @linkonceODRfuncWeakODRAlias = alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; IMPORT-DAG: @linkonceODRfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; IMPORT-DAG: define linkonce_odr void @linkonceODRfunc()
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; On the import side, these aliases are not imported (they don't point to a linkonce_odr)
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; IMPORT-DAG: declare void @globalfuncAlias()
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; IMPORT-DAG: declare void @globalfuncWeakAlias()
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; IMPORT-DAG: declare void @globalfuncLinkonceAlias()
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; IMPORT-DAG: declare void @globalfuncWeakODRAlias()
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; IMPORT-DAG: declare void @globalfuncLinkonceODRAlias()
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; IMPORT-DAG: declare void @internalfuncAlias()
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; IMPORT-DAG: declare void @internalfuncWeakAlias()
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; IMPORT-DAG: declare void @internalfuncLinkonceAlias()
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; IMPORT-DAG: declare void @internalfuncWeakODRAlias()
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; IMPORT-DAG: declare void @internalfuncLinkonceODRAlias()
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; IMPORT-DAG: declare void @weakODRfuncAlias()
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; IMPORT-DAG: declare void @weakODRfuncWeakAlias()
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; IMPORT-DAG: declare void @weakODRfuncLinkonceAlias()
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; IMPORT-DAG: declare void @weakODRfuncWeakODRAlias()
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; IMPORT-DAG: declare void @weakODRfuncLinkonceODRAlias()
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; IMPORT-DAG: declare void @linkoncefuncAlias()
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; IMPORT-DAG: declare void @linkoncefuncWeakAlias()
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; IMPORT-DAG: declare void @linkoncefuncLinkonceAlias()
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; IMPORT-DAG: declare void @linkoncefuncWeakODRAlias()
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; IMPORT-DAG: declare void @linkoncefuncLinkonceODRAlias()
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; IMPORT-DAG: declare void @weakfuncAlias()
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; IMPORT-DAG: declare void @weakfuncWeakAlias()
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; IMPORT-DAG: declare void @weakfuncLinkonceAlias()
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; IMPORT-DAG: declare void @weakfuncWeakODRAlias()
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; IMPORT-DAG: declare void @weakfuncLinkonceODRAlias()
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; Promotion + internalization should internalize all of these, except for aliases of
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; linkonce_odr functions, because alias to linkonce_odr are the only aliases we will
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; import (see selectCallee() in FunctionImport.cpp).
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; PROMOTE-INTERNALIZE-DAG: @globalfuncAlias = internal alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @globalfuncWeakAlias = internal alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @globalfuncLinkonceAlias = internal alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @globalfuncWeakODRAlias = internal alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @globalfuncLinkonceODRAlias = internal alias void (...), bitcast (void ()* @globalfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @internalfuncAlias = internal alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @internalfuncWeakAlias = internal alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @internalfuncLinkonceAlias = internal alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @internalfuncWeakODRAlias = internal alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @internalfuncLinkonceODRAlias = internal alias void (...), bitcast (void ()* @internalfunc.llvm.0 to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkonceODRfuncWeakAlias = internal alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkonceODRfuncLinkonceAlias = internal alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkonceODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkonceODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakODRfuncAlias = internal alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakODRfuncWeakAlias = internal alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakODRfuncLinkonceAlias = internal alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakODRfuncWeakODRAlias = internal alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakODRfuncLinkonceODRAlias = internal alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkoncefuncAlias = internal alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkoncefuncWeakAlias = internal alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkoncefuncLinkonceAlias = internal alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkoncefuncWeakODRAlias = internal alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @linkoncefuncLinkonceODRAlias = internal alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakfuncAlias = internal alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakfuncWeakAlias = internal alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakfuncLinkonceAlias = internal alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakfuncWeakODRAlias = internal alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: @weakfuncLinkonceODRAlias = internal alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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; PROMOTE-INTERNALIZE-DAG: define internal void @globalfunc()
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; PROMOTE-INTERNALIZE-DAG: define internal void @internalfunc.llvm.0()
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; PROMOTE-INTERNALIZE-DAG: define internal void @linkonceODRfunc()
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; PROMOTE-INTERNALIZE-DAG: define internal void @weakODRfunc()
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; PROMOTE-INTERNALIZE-DAG: define internal void @linkoncefunc()
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; PROMOTE-INTERNALIZE-DAG: define internal void @weakfunc()
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define i32 @main() #0 {
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entry:
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call void @globalfuncAlias()
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call void @globalfuncWeakAlias()
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call void @globalfuncLinkonceAlias()
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call void @globalfuncWeakODRAlias()
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call void @globalfuncLinkonceODRAlias()
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call void @internalfuncAlias()
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call void @internalfuncWeakAlias()
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call void @internalfuncLinkonceAlias()
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call void @internalfuncWeakODRAlias()
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call void @internalfuncLinkonceODRAlias()
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call void @linkonceODRfuncAlias()
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call void @linkonceODRfuncWeakAlias()
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call void @linkonceODRfuncLinkonceAlias()
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call void @linkonceODRfuncWeakODRAlias()
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call void @linkonceODRfuncLinkonceODRAlias()
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call void @weakODRfuncAlias()
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call void @weakODRfuncWeakAlias()
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call void @weakODRfuncLinkonceAlias()
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call void @weakODRfuncWeakODRAlias()
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call void @weakODRfuncLinkonceODRAlias()
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call void @linkoncefuncAlias()
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call void @linkoncefuncWeakAlias()
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call void @linkoncefuncLinkonceAlias()
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call void @linkoncefuncWeakODRAlias()
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call void @linkoncefuncLinkonceODRAlias()
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call void @weakfuncAlias()
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call void @weakfuncWeakAlias()
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call void @weakfuncLinkonceAlias()
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call void @weakfuncWeakODRAlias()
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call void @weakfuncLinkonceODRAlias()
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ret i32 0
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}
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declare void @globalfuncAlias()
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declare void @globalfuncWeakAlias()
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declare void @globalfuncLinkonceAlias()
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declare void @globalfuncWeakODRAlias()
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declare void @globalfuncLinkonceODRAlias()
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declare void @internalfuncAlias()
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declare void @internalfuncWeakAlias()
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declare void @internalfuncLinkonceAlias()
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declare void @internalfuncWeakODRAlias()
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declare void @internalfuncLinkonceODRAlias()
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declare void @linkonceODRfuncAlias()
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declare void @linkonceODRfuncWeakAlias()
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declare void @linkonceODRfuncLinkonceAlias()
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declare void @linkonceODRfuncWeakODRAlias()
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declare void @linkonceODRfuncLinkonceODRAlias()
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declare void @weakODRfuncAlias()
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declare void @weakODRfuncWeakAlias()
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declare void @weakODRfuncLinkonceAlias()
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declare void @weakODRfuncWeakODRAlias()
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declare void @weakODRfuncLinkonceODRAlias()
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declare void @linkoncefuncAlias()
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declare void @linkoncefuncWeakAlias()
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declare void @linkoncefuncLinkonceAlias()
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declare void @linkoncefuncWeakODRAlias()
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declare void @linkoncefuncLinkonceODRAlias()
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declare void @weakfuncAlias()
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declare void @weakfuncWeakAlias()
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declare void @weakfuncLinkonceAlias()
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declare void @weakfuncWeakODRAlias()
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declare void @weakfuncLinkonceODRAlias()
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