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[LTO] Add the ability to test -thinlto-emit-imports-files through llvm-lto2

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Summary:
Start bringing llvm-lto2 to a level where we can test the LTO API
a bit deeper.

Reviewers: tejohnson

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D23681

llvm-svn: 279349
This commit is contained in:
Mehdi Amini 2016-08-19 23:54:40 +00:00
parent b3763777c2
commit c319f0c436
2 changed files with 28 additions and 1 deletions
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13
test/ThinLTO/X86/emit_imports.ll
View File

@ -12,6 +12,19 @@
; The imports file for Input/emit_imports.ll is empty as it does not import anything.
; RUN: cat %t2.bc.imports | count 0
; RUN: rm -f %t*.thinlto.bc %t*.bc.imports
; RUN: llvm-lto2 %t1.bc %t2.bc -o %t.o \
; RUN: -thinlto-distributed-indexes \
; RUN: -r=%t1.bc,g, \
; RUN: -r=%t1.bc,f,px \
; RUN: -r=%t2.bc,g,px
; RUN: cat %t1.bc.imports | count 1
; RUN: cat %t1.bc.imports | FileCheck %s --check-prefix=IMPORTS1
; The imports file for Input/emit_imports.ll is empty as it does not import anything.
; RUN: cat %t2.bc.imports | count 0
declare void @g(...)
define void @f() {

16
tools/llvm-lto2/llvm-lto2.cpp
View File

@ -33,6 +33,15 @@ static cl::opt<std::string> OutputFilename("o", cl::Required,
static cl::opt<bool> SaveTemps("save-temps", cl::desc("Save temporary files"));
static cl::opt<bool>
ThinLTODistributedIndexes("thinlto-distributed-indexes", cl::init(false),
cl::desc("Write out individual index and "
"import files for the "
"distributed backend case"));
static cl::opt<int> Threads("-thinlto-threads",
cl::init(thread::hardware_concurrency()));
static cl::list<std::string> SymbolResolutions(
"r",
cl::desc("Specify a symbol resolution: filename,symbolname,resolution\n"
@ -135,7 +144,12 @@ int main(int argc, char **argv) {
check(Conf.addSaveTemps(OutputFilename + "."),
"Config::addSaveTemps failed");
LTO Lto(std::move(Conf));
ThinBackend Backend;
if (ThinLTODistributedIndexes)
Backend = createWriteIndexesThinBackend("", "", true, "");
else
Backend = createInProcessThinBackend(Threads);
LTO Lto(std::move(Conf), std::move(Backend));
bool HasErrors = false;
for (std::string F : InputFilenames) {