MIR Parser: issue an error when the Context discard value names.

This is in line with the LLParser behavior

llvm-svn: 281811

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index 104d7d18812..35614d3b77b 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -828,6 +828,14 @@ std::unique_ptr<MIRParser> llvm::createMIRParserFromFile(StringRef Filename,
 std::unique_ptr<MIRParser>
 llvm::createMIRParser(std::unique_ptr<MemoryBuffer> Contents,
                       LLVMContext &Context) {
+  if (Context.shouldDiscardValueNames()) {
+    Context.diagnose(DiagnosticInfoMIRParser(
+        DS_Error,
+        SMDiagnostic(
+            Filename, SourceMgr::DK_Error,
+            "Can't read MIR with a Context that discards named Values")));
+    return nullptr;
+  }
   auto Filename = Contents->getBufferIdentifier();
   return llvm::make_unique<MIRParser>(
       llvm::make_unique<MIRParserImpl>(std::move(Contents), Filename, Context));