9ba95f99f3
This restores commit r278330, with fixes for a few bot failures: - Fix a late change I had made to the save temps output file that I missed due to existing files sitting on my disk - Fix a bunch of Windows bot failures with "ambiguous call to overloaded function" due to confusion between llvm::make_unique vs std::make_unique (preface the new make_unique calls with "llvm::") - Attempt to fix a modules bot failure by adding a missing include to LTO/Config.h. Original change: Resolution-based LTO API. Summary: This introduces a resolution-based LTO API. The main advantage of this API over existing APIs is that it allows the linker to supply a resolution for each symbol in each object, rather than the combined object as a whole. This will become increasingly important for use cases such as ThinLTO which require us to process symbol resolutions in a more complicated way than just adjusting linkage. Patch by Peter Collingbourne. Reviewers: rafael, tejohnson, mehdi_amini Subscribers: lhames, tejohnson, mehdi_amini, llvm-commits Differential Revision: https://reviews.llvm.org/D20268 llvm-svn: 278338
37 lines
1.5 KiB
LLVM
37 lines
1.5 KiB
LLVM
; RUN: opt -module-summary %s -o %t.o
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; RUN: opt -module-summary %p/Inputs/thinlto_alias.ll -o %t2.o
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; Ensure that a preempted weak symbol that is linked in as a local
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; copy is handled properly. Specifically, the local copy will be promoted,
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; and internalization should be able to use the original non-promoted
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; name to locate the summary (otherwise internalization will abort because
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; it expects to locate summaries for all definitions).
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; Note that gold picks the first copy of weakfunc() as the prevailing one,
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; so listing %t2.o first is sufficient to ensure that this copy is
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; preempted.
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; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold.so \
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; RUN: --plugin-opt=thinlto \
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; RUN: --plugin-opt=save-temps \
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; RUN: -o %t3.o %t2.o %t.o
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; RUN: llvm-nm %t3.o | FileCheck %s
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; RUN: llvm-dis %t.o.4.opt.bc -o - | FileCheck --check-prefix=OPT %s
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; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck --check-prefix=OPT2 %s
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; This does not currently pass because the gold plugin now uses the
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; combined summary rather than the IRMover to change the module's linkage
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; during the ThinLTO backend. The internalization step implemented by IRMover
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; for preempted symbols has not yet been implemented for the combined summary.
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; XFAIL: *
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; CHECK-NOT: U f
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; OPT: define hidden void @weakfunc.llvm.0()
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; OPT2: define weak void @weakfunc()
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target triple = "x86_64-unknown-linux-gnu"
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@weakfuncAlias = alias void (...), bitcast (void ()* @weakfunc to void (...)*)
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define weak void @weakfunc() {
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entry:
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ret void
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}
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