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llvm-project/llvm/test/ThinLTO/X86/linkonce_aliasee_ref_import.ll

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[ThinLTO] Correctly resolve linkonce when importing aliasee 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
2016-10-30 13:15:23 +08:00
; RUN: opt -module-summary %s -o %t1.bc
; RUN: opt -module-summary %p/Inputs/linkonce_aliasee_ref_import.ll -o %t2.bc
; Import with instr limit to ensure only foo imported.
; RUN: llvm-lto -thinlto-action=run -exported-symbol=main -import-instr-limit=5 %t1.bc %t2.bc
; RUN: llvm-nm -o - < %t1.bc.thinlto.o | FileCheck %s --check-prefix=NM1
; RUN: llvm-nm -o - < %t2.bc.thinlto.o | FileCheck %s --check-prefix=NM2
; Import with instr limit to ensure only foo imported.
llvm-lto2: Move the LTO::run() action behind a subcommand. Move LTO::run() to a "run" subcommand so that we can introduce new subcommands for testing different parts of the LTO implementation. This doesn't use llvm::cl subcommands because it doesn't appear to be currently possible to pass an argument not associated with a subcommand to a subcommand (e.g. -lto-use-new-pm, -mcpu=yonah). Differential Revision: https://reviews.llvm.org/D31410 llvm-svn: 299967
2017-04-12 02:12:00 +08:00
; RUN: llvm-lto2 run %t1.bc %t2.bc -o %t.o -save-temps \
[ThinLTO] Correctly resolve linkonce when importing aliasee 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
2016-10-30 13:15:23 +08:00
; RUN: -r=%t1.bc,foo,pxl \
; RUN: -r=%t1.bc,baz,pxl \
; RUN: -r=%t1.bc,baz.clone,pxl \
; RUN: -r=%t1.bc,bar,pl \
; RUN: -r=%t2.bc,main,pxl \
; RUN: -r=%t2.bc,foo,l \
; RUN: -import-instr-limit=5
; RUN: llvm-nm -o - < %t1.bc.thinlto.o | FileCheck %s --check-prefix=NM1
; RUN: llvm-nm -o - < %t2.bc.thinlto.o | FileCheck %s --check-prefix=NM2
; Check that we converted baz.clone to a weak
; NM1: W baz.clone
; Check that we imported a ref (and not def) to baz.clone
; NM2: U baz.clone
Temporarily revert "For X86-64 linux and PPC64 linux align int128 to 16 bytes." until we can get better TargetMachine::isCompatibleDataLayout to compare - otherwise we can't code generate existing bitcode without a string equality data layout. This reverts commit r294702. llvm-svn: 294709
2017-02-10 12:35:32 +08:00
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
[ThinLTO] Correctly resolve linkonce when importing aliasee 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
2016-10-30 13:15:23 +08:00
target triple = "x86_64-grtev4-linux-gnu"
$baz.clone = comdat any
@baz = weak alias void (), void ()* @baz.clone
define void @foo() #5 align 2 {
tail call void @baz.clone()
ret void
}
define linkonce_odr void @baz.clone() #5 comdat align 2 {
call void @bar()
call void @bar()
call void @bar()
call void @bar()
call void @bar()
call void @bar()
call void @bar()
ret void
}
define void @bar() {
ret void
}