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Output ELF files after ThinLTO is run. 

Summary:
The gold linker allowed you to output the ELF files after LTO was run. It did
it by using the 'obj-path' option. This replicates that behavior.

Reviewers: espindola, ruiu, MaskRay, pcc

Reviewed By: MaskRay, pcc

Subscribers: grimar, emaste, inglorion, arichardson, steven_wu, dexonsmith, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D56046

llvm-svn: 354917
This commit is contained in:
Bill Wendling 2019-02-26 19:29:14 +00:00
parent 521f004e99
commit 01706bda5b
3 changed files with 57 additions and 12 deletions
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27
lld/ELF/LTO.cpp
View File

@ -276,20 +276,23 @@ std::vector<InputFile *> BitcodeCompiler::compile() {
if (!Config->ThinLTOCacheDir.empty())
pruneCache(Config->ThinLTOCacheDir, Config->ThinLTOCachePolicy);
std::vector<InputFile *> Ret;
for (unsigned I = 0; I != MaxTasks; ++I) {
if (Buf[I].empty())
continue;
if (Config->SaveTemps) {
if (I == 0)
saveBuffer(Buf[I], Config->OutputFile + ".lto.o");
else
saveBuffer(Buf[I], Config->OutputFile + Twine(I) + ".lto.o");
}
InputFile *Obj = createObjectFile(MemoryBufferRef(Buf[I], "lto.tmp"));
Ret.push_back(Obj);
if (!Config->LTOObjPath.empty()) {
saveBuffer(Buf[0], Config->LTOObjPath);
for (unsigned I = 1; I != MaxTasks; ++I)
saveBuffer(Buf[I], Config->LTOObjPath + Twine(I));
}
if (Config->SaveTemps) {
saveBuffer(Buf[0], Config->OutputFile + ".lto.o");
for (unsigned I = 1; I != MaxTasks; ++I)
saveBuffer(Buf[I], Config->OutputFile + Twine(I) + ".lto.o");
}
std::vector<InputFile *> Ret;
for (unsigned I = 0; I != MaxTasks; ++I)
if (!Buf[I].empty())
Ret.push_back(createObjectFile(MemoryBufferRef(Buf[I], "lto.tmp")));
for (std::unique_ptr<MemoryBuffer> &File : Files)
if (File)
Ret.push_back(createObjectFile(*File));

7
lld/test/ELF/lto/Inputs/obj-path.ll Normal file
View File

@ -0,0 +1,7 @@
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @g() {
entry:
ret void
}

35
lld/test/ELF/lto/obj-path.ll Normal file
View File

@ -0,0 +1,35 @@
; REQUIRES: x86
; RUN: opt -module-summary %s -o %t1.o
; RUN: opt -module-summary %p/Inputs/obj-path.ll -o %t2.o
; Test to ensure that obj-path creates the ELF file.
; RUN: rm -f %t4.o
; RUN: ld.lld --plugin-opt=obj-path=%t4.o -shared %t1.o %t2.o -o %t3
; RUN: llvm-readobj -t %t3 | FileCheck %s
; RUN: llvm-readobj -h %t4.o1 | FileCheck %s -check-prefix=ELF1
; RUN: llvm-readobj -h %t4.o2 | FileCheck %s -check-prefix=ELF2
; RUN: llvm-nm %t4.o1 2>&1 | FileCheck %s -check-prefix=NM1
; RUN: llvm-nm %t4.o2 2>&1 | FileCheck %s -check-prefix=NM2
; CHECK: Name: g
; CHECK-NEXT: Value: 0x1010
; CHECK: Name: f
; CHECK-NEXT: Value: 0x1000
; NM1: T f
; ELF1: Format: ELF64-x86-64
; NM2: T g
; ELF2: Format: ELF64-x86-64
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare void @g(...)
define void @f() {
entry:
call void (...) @g()
ret void
}