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310ea0ff26
Summary: When we have an aliasee that is linkonce, while we can't convert the non-prevailing copies to available_externally, we still need to convert the prevailing copy to weak. If a reference to the aliasee is exported, not converting a copy to weak will result in undefined references when the linkonce is removed in its original module. Add a new test and update existing tests. Reviewers: mehdi_amini Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D26076 llvm-svn: 285512
51 lines
1.5 KiB
LLVM
51 lines
1.5 KiB
LLVM
; RUN: opt -module-summary %s -o %t1.bc
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; RUN: opt -module-summary %p/Inputs/linkonce_aliasee_ref_import.ll -o %t2.bc
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; Import with instr limit to ensure only foo imported.
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; RUN: llvm-lto -thinlto-action=run -exported-symbol=main -import-instr-limit=5 %t1.bc %t2.bc
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; RUN: llvm-nm -o - < %t1.bc.thinlto.o | FileCheck %s --check-prefix=NM1
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; RUN: llvm-nm -o - < %t2.bc.thinlto.o | FileCheck %s --check-prefix=NM2
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; Import with instr limit to ensure only foo imported.
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; RUN: llvm-lto2 %t1.bc %t2.bc -o %t.o -save-temps \
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; RUN: -r=%t1.bc,foo,pxl \
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; RUN: -r=%t1.bc,baz,pxl \
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; RUN: -r=%t1.bc,baz.clone,pxl \
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; RUN: -r=%t1.bc,bar,pl \
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; RUN: -r=%t2.bc,main,pxl \
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; RUN: -r=%t2.bc,foo,l \
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; RUN: -import-instr-limit=5
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; RUN: llvm-nm -o - < %t1.bc.thinlto.o | FileCheck %s --check-prefix=NM1
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; RUN: llvm-nm -o - < %t2.bc.thinlto.o | FileCheck %s --check-prefix=NM2
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; Check that we converted baz.clone to a weak
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; NM1: W baz.clone
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; Check that we imported a ref (and not def) to baz.clone
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; NM2: U baz.clone
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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-grtev4-linux-gnu"
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$baz.clone = comdat any
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@baz = weak alias void (), void ()* @baz.clone
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define void @foo() #5 align 2 {
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tail call void @baz.clone()
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ret void
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}
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define linkonce_odr void @baz.clone() #5 comdat align 2 {
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call void @bar()
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call void @bar()
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call void @bar()
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call void @bar()
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call void @bar()
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call void @bar()
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call void @bar()
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ret void
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}
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define void @bar() {
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ret void
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}
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