IRGen: Write .dwo files when -split-dwarf-file is used together with -fthinlto-index.

Differential Revision: https://reviews.llvm.org/D47597

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@333677 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/BackendUtil.cpp b/lib/CodeGen/BackendUtil.cpp
index f9239f636496ec54b05f0307ae5a981bbc1656b4..f9855f03a4815ff0abc5aa68c4c59172897d7b45 100644 (file)
--- a/lib/CodeGen/BackendUtil.cpp
+++ b/lib/CodeGen/BackendUtil.cpp
@@ -1161,6 +1161,7 @@ static void runThinLTOBackend(ModuleSummaryIndex *CombinedIndex, Module *M,
   Conf.DebugPassManager = CGOpts.DebugPassManager;
   Conf.RemarksWithHotness = CGOpts.DiagnosticsWithHotness;
   Conf.RemarksFilename = CGOpts.OptRecordFile;
+  Conf.DwoPath = CGOpts.SplitDwarfFile;
   switch (Action) {
   case Backend_EmitNothing:
     Conf.PreCodeGenModuleHook = [](size_t Task, const Module &Mod) {

diff --git a/test/CodeGen/thinlto-split-dwarf.c b/test/CodeGen/thinlto-split-dwarf.c
new file mode 100644 (file)
index 0000000..2a0d82b
--- /dev/null
+++ b/test/CodeGen/thinlto-split-dwarf.c
@@ -0,0 +1,21 @@
+// REQUIRES: x86-registered-target
+
+// RUN: %clang_cc1 -debug-info-kind=limited -triple x86_64-unknown-linux-gnu \
+// RUN:   -flto=thin -emit-llvm-bc \
+// RUN:   -o %t.o %s
+
+// RUN: llvm-lto2 run -thinlto-distributed-indexes %t.o \
+// RUN:   -o %t2.index \
+// RUN:   -r=%t.o,main,px
+
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu \
+// RUN:   -emit-obj -fthinlto-index=%t.o.thinlto.bc \
+// RUN:   -o %t.native.o -split-dwarf-file %t.native.dwo -x ir %t.o
+
+// RUN: llvm-readobj -sections %t.native.o | FileCheck --check-prefix=O %s
+// RUN: llvm-readobj -sections %t.native.dwo | FileCheck --check-prefix=DWO %s
+
+// O-NOT: .dwo
+// DWO: .dwo
+
+int main() {}