[Turbofan] Save and restore lr in OutOfLineRecordWrite when frame is elided.

src/compiler/ppc/code-generator-ppc.cc

Index: src/compiler/ppc/code-generator-ppc.cc
diff --git a/src/compiler/ppc/code-generator-ppc.cc b/src/compiler/ppc/code-generator-ppc.cc
index 04c807960080530a897bcd04e00ebeb045af3b8a..076cc25de1f9ed728fd301f1f8aba3cdef13648c 100644
--- a/src/compiler/ppc/code-generator-ppc.cc
+++ b/src/compiler/ppc/code-generator-ppc.cc
@@ -183,12 +183,20 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
     }
     SaveFPRegsMode const save_fp_mode =
         frame()->DidAllocateDoubleRegisters() ? kSaveFPRegs : kDontSaveFPRegs;
-    // TODO(turbofan): Once we get frame elision working, we need to save
-    // and restore lr properly here if the frame was elided.
+    if (!frame()->needs_frame()) {
+      // We need to save and restore lr if the frame was elided.
+      __ mflr(scratch1_);
+      __ Push(scratch1_);
+    }
     RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_,
                          EMIT_REMEMBERED_SET, save_fp_mode);
     __ add(scratch1_, object_, offset_);
     __ CallStub(&stub);
+    if (!frame()->needs_frame()) {
+      // We need to save and restore lr if the frame was elided.
+      __ Pop(scratch1_);
+      __ mtlr(scratch1_);
+    }
   }
 
  private: