[MIRTesting] Abort when failing to parse a function.

When we failed to parse a function in the mir parser, we should abort
the whole compilation instead of continuing in a weird state. Indeed,
this was creating strange machine function passes failures that were
hard to understand, until we notice that the function actually did not
get parsed correctly!

llvm-svn: 276348

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp b/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
index 338cd1e2203..3b69ed55fb6 100644
--- a/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
+++ b/llvm/lib/CodeGen/MachineFunctionAnalysis.cpp
@@ -49,8 +49,10 @@ bool MachineFunctionAnalysis::runOnFunction(Function &F) {
   assert(!MF && "MachineFunctionAnalysis already initialized!");
   MF = new MachineFunction(&F, TM, NextFnNum++,
                            getAnalysis<MachineModuleInfo>());
-  if (MFInitializer)
-    MFInitializer->initializeMachineFunction(*MF);
+  if (MFInitializer) {
+    if (MFInitializer->initializeMachineFunction(*MF))
+      report_fatal_error("Unable to initialize machine function");
+  }
   return false;
 }