[ProfileData] Add error codes for compression failures

Be more specific in describing compression failures. Also, check for
this kind of error in emitNameData().

This is part of a series of patches to transition ProfileData over to
the stricter Error/Expected interface.

llvm-svn: 268400

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
index 397e64b410e..930001fd684 100644
--- a/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -374,8 +374,10 @@ void InstrProfiling::emitNameData() {
     return;
 
   std::string CompressedNameStr;
-  collectPGOFuncNameStrings(ReferencedNames, CompressedNameStr,
-                            DoNameCompression);
+  if (auto EC = collectPGOFuncNameStrings(ReferencedNames, CompressedNameStr,
+                                          DoNameCompression)) {
+    llvm::report_fatal_error(EC.message(), false);
+  }
 
   auto &Ctx = M->getContext();
   auto *NamesVal = llvm::ConstantDataArray::getString(