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42 lines
1.6 KiB
LLVM
42 lines
1.6 KiB
LLVM
; Test to ensure that ThinLTO sorts the modules before passing to the
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; final native link based on the linker's determination of which
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; object within a static library contains the prevailing def of a symbol.
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; First generate bitcode with a module summary index for each file
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; RUN: opt -module-summary %s -o %t.o
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; RUN: opt -module-summary %p/Inputs/thinlto_weak_library1.ll -o %t2.o
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; RUN: opt -module-summary %p/Inputs/thinlto_weak_library2.ll -o %t3.o
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; Although the objects are ordered "%t2.o %t3.o" in the library, the
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; linker selects %t3.o first since it satisfies a strong reference from
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; %t.o. It later selects %t2.o based on the strong ref from %t3.o.
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; Therefore, %t3.o's copy of @f is prevailing, and we need to link
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; %t3.o before %t2.o in the final native link.
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; RUN: %gold -plugin %llvmshlibdir/LLVMgold%shlibext \
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; RUN: --plugin-opt=thinlto \
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; RUN: --plugin-opt=save-temps \
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; RUN: -m elf_x86_64 \
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; RUN: -o %t4 \
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; RUN: %t.o \
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; RUN: --start-lib %t2.o %t3.o --end-lib
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; Make sure we completely dropped the definition of the non-prevailing
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; copy of f() (and didn't simply convert to available_externally, which
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; would incorrectly enable inlining).
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; RUN: llvm-dis %t2.o.1.promote.bc -o - | FileCheck %s
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; CHECK: declare dso_local i32 @f()
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; ModuleID = 'thinlto_weak_library.c'
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source_filename = "thinlto_weak_library.c"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nounwind uwtable
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define i32 @main() local_unnamed_addr {
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entry:
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tail call void (...) @test2()
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ret i32 0
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}
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declare void @test2(...) local_unnamed_addr
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