MIR Parser: Report an error when a machine function doesn't have a corresponding function.

This commit reports an error when a machine function from a MIR file that contains
LLVM IR can't find a function with the same name in the loaded LLVM IR module.

Reviewers: Duncan P. N. Exon Smith

Differential Revision: http://reviews.llvm.org/D10468

llvm-svn: 239831

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
index acd3c1130a5..8fe4c838000 100644
--- a/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
+++ b/llvm/lib/CodeGen/MIRParser/MIRParser.cpp
@@ -173,6 +173,9 @@ bool MIRParserImpl::parseMachineFunction(yaml::Input &In, Module &M,
   Functions.insert(std::make_pair(FunctionName, std::move(MF)));
   if (NoLLVMIR)
     createDummyFunction(FunctionName, M);
+  else if (!M.getFunction(FunctionName))
+    return error(Twine("function '") + FunctionName +
+                 "' isn't defined in the provided LLVM IR");
   return false;
 }