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Differential D20634

[ThinLTO] Resolve LinkOnceAny
ClosedPublic

Authored by tejohnson on May 25 2016, 10:34 AM.

Details

Reviewers
mehdi_amini
Commits
rG28c03b56ecaf: [ThinLTO] Resolve LinkOnceAny
rL270850: [ThinLTO] Resolve LinkOnceAny
Summary

Ensure we keep prevailing copy of LinkOnceAny by converting it to
WeakAny.

Rename odr_resolution test to the now more appropriate weak_resolution
(weak in the linker sense includes linkonce).

Diff Detail

Repository
rL LLVM

Event Timeline

tejohnson updated this revision to Diff 58455.May 25 2016, 10:34 AM
tejohnson retitled this revision from to [ThinLTO] Resolve LinkOnceAny.
tejohnson updated this object.
tejohnson added a reviewer: mehdi_amini.
tejohnson added a subscriber: llvm-commits.
Herald added a subscriber: mehdi_amini. · View Herald TranscriptMay 25 2016, 10:34 AM
mehdi_amini accepted this revision.May 25 2016, 5:46 PM
mehdi_amini edited edge metadata.

LGTM

This revision is now accepted and ready to land.May 25 2016, 5:46 PM
Closed by commit rL270850: [ThinLTO] Resolve LinkOnceAny (authored by tejohnson). · Explain WhyMay 26 2016, 7:23 AM
This revision was automatically updated to reflect the committed changes.

Revision Contents

PathSize
llvm/
trunk/
lib/
LTO/
21 lines
test/
ThinLTO/
X86/
Inputs/
29 lines
38 lines
12 lines
58 lines
73 lines

Diff 58608

llvm/trunk/lib/LTO/LTO.cpp

Show First 20 Lines • Show All 54 Lines • ▼ Show 20 Lines if (GlobalInvolvedWithAlias.count(S.get()))
continue; continue;
GlobalValue::LinkageTypes OriginalLinkage = S->linkage(); GlobalValue::LinkageTypes OriginalLinkage = S->linkage();
if (!GlobalValue::isWeakForLinker(OriginalLinkage)) if (!GlobalValue::isWeakForLinker(OriginalLinkage))
continue; continue;
// We need to emit only one of these, the first module will keep it, // We need to emit only one of these, the first module will keep it,
// but turned into a weak, while the others will drop it when possible. // but turned into a weak, while the others will drop it when possible.
if (!HasMultipleCopies) { if (!HasMultipleCopies) {
// Exported Linkonce needs to be promoted to not be discarded. // Exported Linkonce needs to be promoted to not be discarded.
// FIXME: This should handle LinkOnceAny as well, but that should be a if (GlobalValue::isLinkOnceLinkage(OriginalLinkage) &&
// follow-on to the NFC restructuring:
// if (GlobalValue::isLinkOnceLinkage(OriginalLinkage) &&
// isExported(S->modulePath(), GUID))
// S->setLinkage(GlobalValue::getWeakLinkage(
// GlobalValue::isLinkOnceODRLinkage(OriginalLinkage)));
if (GlobalValue::isLinkOnceODRLinkage(OriginalLinkage) &&
isExported(S->modulePath(), GUID)) isExported(S->modulePath(), GUID))
S->setLinkage(GlobalValue::WeakODRLinkage); S->setLinkage(GlobalValue::getWeakLinkage(
GlobalValue::isLinkOnceODRLinkage(OriginalLinkage)));
} else if (isPrevailing(GUID, S.get())) { } else if (isPrevailing(GUID, S.get())) {
// FIXME: This should handle LinkOnceAny as well, but that should be a if (GlobalValue::isLinkOnceLinkage(OriginalLinkage))
// follow-on to the NFC restructuring: S->setLinkage(GlobalValue::getWeakLinkage(
// if (GlobalValue::isLinkOnceLinkage(OriginalLinkage)) GlobalValue::isLinkOnceODRLinkage(OriginalLinkage)));
// S->setLinkage(GlobalValue::getWeakLinkage(
// GlobalValue::isLinkOnceODRLinkage(OriginalLinkage)));
if (GlobalValue::isLinkOnceODRLinkage(OriginalLinkage))
S->setLinkage(GlobalValue::WeakODRLinkage);
} }
// Alias can't be turned into available_externally. // Alias can't be turned into available_externally.
else if (!isa<AliasSummary>(S.get()) && else if (!isa<AliasSummary>(S.get()) &&
(GlobalValue::isLinkOnceODRLinkage(OriginalLinkage) || (GlobalValue::isLinkOnceODRLinkage(OriginalLinkage) ||
GlobalValue::isWeakODRLinkage(OriginalLinkage))) GlobalValue::isWeakODRLinkage(OriginalLinkage)))
S->setLinkage(GlobalValue::AvailableExternallyLinkage); S->setLinkage(GlobalValue::AvailableExternallyLinkage);
if (S->linkage() != OriginalLinkage) if (S->linkage() != OriginalLinkage)
recordNewLinkage(S->modulePath(), GUID, S->linkage()); recordNewLinkage(S->modulePath(), GUID, S->linkage());
▲ Show 20 Lines • Show All 55 Lines • Show Last 20 Lines

llvm/trunk/test/ThinLTO/X86/Inputs/odr_resolution.ll

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
; Alias are not optimized
@linkoncealias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
; Function with an alias are not optimized
define linkonce_odr void @linkonceodrfuncwithalias() #0 {
entry:
ret void
}
define linkonce_odr void @linkonceodrfunc() #0 {
entry:
ret void
}
define linkonce void @linkoncefunc() #0 {
entry:
ret void
}
define weak_odr void @weakodrfunc() #0 {
entry:
ret void
}
define weak void @weakfunc() #0 {
entry:
ret void
}

llvm/trunk/test/ThinLTO/X86/Inputs/weak_resolution.ll

target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
; Alias are not optimized
@linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
; Alias are not optimized
@linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
; Function with an alias are not optimized
define linkonce_odr void @linkonceodrfuncwithalias() #0 {
entry:
ret void
}
; Function with an alias are not optimized
define linkonce void @linkoncefuncwithalias() #0 {
entry:
ret void
}
define linkonce_odr void @linkonceodrfunc() #0 {
entry:
ret void
}
define linkonce void @linkoncefunc() #0 {
entry:
ret void
}
define weak_odr void @weakodrfunc() #0 {
entry:
ret void
}
define weak void @weakfunc() #0 {
entry:
ret void
}

llvm/trunk/test/ThinLTO/X86/alias_resolution.ll

; RUN: opt -module-summary %s -o %t1.bc ; RUN: opt -module-summary %s -o %t1.bc
; RUN: opt -module-summary %p/Inputs/alias_resolution.ll -o %t2.bc ; RUN: opt -module-summary %p/Inputs/alias_resolution.ll -o %t2.bc
; RUN: llvm-lto -thinlto-action=thinlink -o %t.index.bc %t1.bc %t2.bc ; RUN: llvm-lto -thinlto-action=thinlink -o %t.index.bc %t1.bc %t2.bc
; RUN: llvm-lto -thinlto-action=promote -thinlto-index %t.index.bc %t2.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=PROMOTE_MOD2 --check-prefix=NOTPROMOTED ; RUN: llvm-lto -thinlto-action=promote -thinlto-index %t.index.bc %t2.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=PROMOTE_MOD2 --check-prefix=NOTPROMOTED
; RUN: llvm-lto -thinlto-action=promote -thinlto-index %t.index.bc %t1.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=PROMOTE_MOD1 --check-prefix=NOTPROMOTED ; RUN: llvm-lto -thinlto-action=promote -thinlto-index %t.index.bc %t1.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=PROMOTE_MOD1 --check-prefix=NOTPROMOTED
; There is no importing going on with this IR, but let's check the ODR resolution for compile time ; There is no importing going on with this IR, but let's check the ODR resolution for compile time
; NOTPROMOTED: @linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*) ; NOTPROMOTED: @linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*)
; NOTPROMOTED: @linkonceODRfuncWeakAlias = weak alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*) ; NOTPROMOTED: @linkonceODRfuncWeakAlias = weak alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*)
; NOTPROMOTED: @linkonceODRfuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*) ; PROMOTE_MOD1: @linkonceODRfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*)
; PROMOTE_MOD2: @linkonceODRfuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @linkonceODRfunc{{.*}} to void (...)*)
; PROMOTE_MOD1: @linkonceODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc.mod1 to void (...)*) ; PROMOTE_MOD1: @linkonceODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc.mod1 to void (...)*)
; PROMOTE_MOD2: @linkonceODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*) ; PROMOTE_MOD2: @linkonceODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
; PROMOTE_MOD1: @linkonceODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc.mod1 to void (...)*) ; PROMOTE_MOD1: @linkonceODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkonceODRfunc.mod1 to void (...)*)
; PROMOTE_MOD2: @linkonceODRfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*) ; PROMOTE_MOD2: @linkonceODRfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @linkonceODRfunc to void (...)*)
; NOTPROMOTED: @weakODRfuncAlias = alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*) ; NOTPROMOTED: @weakODRfuncAlias = alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*)
; NOTPROMOTED: @weakODRfuncWeakAlias = weak alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*) ; NOTPROMOTED: @weakODRfuncWeakAlias = weak alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*)
; NOTPROMOTED: @weakODRfuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*) ; PROMOTE_MOD1: @weakODRfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*)
; PROMOTE_MOD2: @weakODRfuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @weakODRfunc{{.*}} to void (...)*)
; PROMOTE_MOD1: @weakODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc.mod1 to void (...)*) ; PROMOTE_MOD1: @weakODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc.mod1 to void (...)*)
; PROMOTE_MOD2: @weakODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc to void (...)*) ; PROMOTE_MOD2: @weakODRfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
; PROMOTE_MOD1: @weakODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc.mod1 to void (...)*) ; PROMOTE_MOD1: @weakODRfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @weakODRfunc.mod1 to void (...)*)
; PROMOTE_MOD2: @weakODRfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @weakODRfunc to void (...)*) ; PROMOTE_MOD2: @weakODRfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @weakODRfunc to void (...)*)
; NOTPROMOTED: @linkoncefuncAlias = alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*) ; NOTPROMOTED: @linkoncefuncAlias = alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*)
; NOTPROMOTED: @linkoncefuncWeakAlias = weak alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*) ; NOTPROMOTED: @linkoncefuncWeakAlias = weak alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*)
; NOTPROMOTED: @linkoncefuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*) ; PROMOTE_MOD1: @linkoncefuncLinkonceAlias = weak alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*)
; PROMOTE_MOD2: @linkoncefuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @linkoncefunc{{.*}} to void (...)*)
; PROMOTE_MOD1: @linkoncefuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc.mod1 to void (...)*) ; PROMOTE_MOD1: @linkoncefuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc.mod1 to void (...)*)
; PROMOTE_MOD2: @linkoncefuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc to void (...)*) ; PROMOTE_MOD2: @linkoncefuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
; PROMOTE_MOD1: @linkoncefuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc.mod1 to void (...)*) ; PROMOTE_MOD1: @linkoncefuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @linkoncefunc.mod1 to void (...)*)
; PROMOTE_MOD2: @linkoncefuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @linkoncefunc to void (...)*) ; PROMOTE_MOD2: @linkoncefuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @linkoncefunc to void (...)*)
; NOTPROMOTED: @weakfuncAlias = alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*) ; NOTPROMOTED: @weakfuncAlias = alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*)
; NOTPROMOTED: @weakfuncWeakAlias = weak alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*) ; NOTPROMOTED: @weakfuncWeakAlias = weak alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*)
; NOTPROMOTED: @weakfuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*) ; PROMOTE_MOD1: @weakfuncLinkonceAlias = weak alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*)
; PROMOTE_MOD2: @weakfuncLinkonceAlias = linkonce alias void (...), bitcast (void ()* @weakfunc{{.*}} to void (...)*)
; FIXME: The "resolution" should turn one of these to linkonce_odr ; FIXME: The "resolution" should turn one of these to linkonce_odr
; PROMOTE_MOD1: @weakfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc.mod1 to void (...)*) ; PROMOTE_MOD1: @weakfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc.mod1 to void (...)*)
; PROMOTE_MOD2: @weakfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc to void (...)*) ; PROMOTE_MOD2: @weakfuncWeakODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc to void (...)*)
; PROMOTE_MOD1: @weakfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc.mod1 to void (...)*) ; PROMOTE_MOD1: @weakfuncLinkonceODRAlias = weak_odr alias void (...), bitcast (void ()* @weakfunc.mod1 to void (...)*)
; PROMOTE_MOD2: @weakfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @weakfunc to void (...)*) ; PROMOTE_MOD2: @weakfuncLinkonceODRAlias = linkonce_odr alias void (...), bitcast (void ()* @weakfunc to void (...)*)
@linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc.mod1 to void (...)*) @linkonceODRfuncAlias = alias void (...), bitcast (void ()* @linkonceODRfunc.mod1 to void (...)*)
Show All 39 Lines

llvm/trunk/test/ThinLTO/X86/odr_resolution.ll

; Do setup work for all below tests: generate bitcode and combined index
; RUN: opt -module-summary %s -o %t.bc
; RUN: opt -module-summary %p/Inputs/odr_resolution.ll -o %t2.bc
; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
; Verify that only one ODR is selected across modules, but non ODR are not affected.
; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=MOD1
; RUN: llvm-lto -thinlto-action=promote %t2.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=MOD2
; When exported, we always preserve a linkonce
; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t3.bc -o - --exported-symbol=linkonceodrfuncInSingleModule | llvm-dis -o - | FileCheck %s --check-prefix=EXPORTED
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
; Alias are resolved, but can't be turned into "available_externally"
; MOD1: @linkoncealias = weak_odr alias void (), void ()* @linkonceodrfuncwithalias
; MOD2: @linkoncealias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
@linkoncealias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
; Function with an alias are not optimized
; MOD1: define linkonce_odr void @linkonceodrfuncwithalias()
; MOD2: define linkonce_odr void @linkonceodrfuncwithalias()
define linkonce_odr void @linkonceodrfuncwithalias() #0 {
entry:
ret void
}
; MOD1: define weak_odr void @linkonceodrfunc()
; MOD2: define available_externally void @linkonceodrfunc()
define linkonce_odr void @linkonceodrfunc() #0 {
entry:
ret void
}
; MOD1: define linkonce void @linkoncefunc()
; MOD2: define linkonce void @linkoncefunc()
define linkonce void @linkoncefunc() #0 {
entry:
ret void
}
; MOD1: define weak_odr void @weakodrfunc()
; MOD2: define available_externally void @weakodrfunc()
define weak_odr void @weakodrfunc() #0 {
entry:
ret void
}
; MOD1: define weak void @weakfunc()
; MOD2: define weak void @weakfunc()
define weak void @weakfunc() #0 {
entry:
ret void
}
; MOD1: define linkonce_odr void @linkonceodrfuncInSingleModule()
; EXPORTED: define weak_odr void @linkonceodrfuncInSingleModule()
define linkonce_odr void @linkonceodrfuncInSingleModule() #0 {
entry:
ret void
}

llvm/trunk/test/ThinLTO/X86/weak_resolution.ll

; Do setup work for all below tests: generate bitcode and combined index
; RUN: opt -module-summary %s -o %t.bc
; RUN: opt -module-summary %p/Inputs/weak_resolution.ll -o %t2.bc
; RUN: llvm-lto -thinlto-action=thinlink -o %t3.bc %t.bc %t2.bc
; Verify that prevailing weak for linker symbol is selected across modules,
; non-prevailing ODR are not kept when possible, but non-ODR non-prevailing
; are not affected.
; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=MOD1
; RUN: llvm-lto -thinlto-action=promote %t2.bc -thinlto-index=%t3.bc -o - | llvm-dis -o - | FileCheck %s --check-prefix=MOD2
; When exported, we always preserve a linkonce
; RUN: llvm-lto -thinlto-action=promote %t.bc -thinlto-index=%t3.bc -o - --exported-symbol=linkonceodrfuncInSingleModule | llvm-dis -o - | FileCheck %s --check-prefix=EXPORTED
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"
; Alias are resolved, but can't be turned into "available_externally"
; MOD1: @linkonceodralias = weak_odr alias void (), void ()* @linkonceodrfuncwithalias
; MOD2: @linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
@linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
; Alias are resolved, but can't be turned into "available_externally"
; MOD1: @linkoncealias = weak alias void (), void ()* @linkoncefuncwithalias
; MOD2: @linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
@linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
; Function with an alias are not optimized
; MOD1: define linkonce_odr void @linkonceodrfuncwithalias()
; MOD2: define linkonce_odr void @linkonceodrfuncwithalias()
define linkonce_odr void @linkonceodrfuncwithalias() #0 {
entry:
ret void
}
; Function with an alias are not optimized
; MOD1: define linkonce void @linkoncefuncwithalias()
; MOD2: define linkonce void @linkoncefuncwithalias()
define linkonce void @linkoncefuncwithalias() #0 {
entry:
ret void
}
; MOD1: define weak_odr void @linkonceodrfunc()
; MOD2: define available_externally void @linkonceodrfunc()
define linkonce_odr void @linkonceodrfunc() #0 {
entry:
ret void
}
; MOD1: define weak void @linkoncefunc()
; MOD2: define linkonce void @linkoncefunc()
define linkonce void @linkoncefunc() #0 {
entry:
ret void
}
; MOD1: define weak_odr void @weakodrfunc()
; MOD2: define available_externally void @weakodrfunc()
define weak_odr void @weakodrfunc() #0 {
entry:
ret void
}
; MOD1: define weak void @weakfunc()
; MOD2: define weak void @weakfunc()
define weak void @weakfunc() #0 {
entry:
ret void
}
; MOD1: define linkonce_odr void @linkonceodrfuncInSingleModule()
; EXPORTED: define weak_odr void @linkonceodrfuncInSingleModule()
define linkonce_odr void @linkonceodrfuncInSingleModule() #0 {
entry:
ret void
}
llvm/trunk/test/ThinLTO/X86/alias_resolution.ll