ad5fad0ac5
Summary: That unless the user requested an output object (--lto-obj-path), the an unused empty combined module is not emitted. This changed is helpful for some target (ex. RISCV-V) which encoded the ABI info in IR module flags (target-abi). Empty unused module has no ABI info so the linker would get the linking error during merging incompatible ABIs. Reviewers: tejohnson, espindola, MaskRay Subscribers: emaste, inglorion, arichardson, hiraditya, simoncook, MaskRay, steven_wu, dexonsmith, PkmX, dang, lenary, s.egerton, luismarques, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D78988
38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; REQUIRES: x86
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; Test to ensure that thinlto-index-only with lto-obj-path creates
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; the native object file.
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; RUN: opt -module-summary %s -o %t1.obj
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; RUN: opt -module-summary %p/Inputs/thinlto.ll -o %t2.obj
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; RUN: rm -f %t4.obj
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; RUN: lld-link -thinlto-index-only -lto-obj-path:%t4.obj -out:t3.exe \
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; RUN: -entry:main %t1.obj %t2.obj
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; RUN: llvm-readobj -h %t4.obj | FileCheck %s
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; RUN: llvm-nm %t4.obj 2>&1 | FileCheck %s -check-prefix=SYMBOLS
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; RUN: llvm-nm %t4.obj 2>&1 | count 1
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;; Ensure lld emits empty combined module if specific obj-path.
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; RUN: rm -fr %t.dir/objpath && mkdir -p %t.dir/objpath
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; RUN: lld-link /out:%t.dir/objpath/a.exe -lto-obj-path:%t4.obj \
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; RUN: -entry:main %t1.obj %t2.obj -lldsavetemps
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; RUN: ls %t.dir/objpath/a.exe.lto.* | count 3
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;; Ensure lld does not emit empty combined module in default.
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; RUN: rm -fr %t.dir/objpath && mkdir -p %t.dir/objpath
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; RUN: lld-link /out:%t.dir/objpath/a.exe \
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; RUN: -entry:main %t1.obj %t2.obj -lldsavetemps
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; RUN: ls %t.dir/objpath/a.exe.lto.* | count 2
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; CHECK: Format: COFF-x86-64
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; SYMBOLS: @feat.00
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target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.0.24215"
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declare void @g(...)
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define void @main() {
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call void (...) @g()
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ret void
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}
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