[Profile] Fix debug info correlation test failure on mac.

Author: ZequanWu

compiler-rt/lib/profile/InstrProfiling.c

@@ -90,6 +90,6 @@ COMPILER_RT_VISIBILITY void __llvm_profile_reset_counters(void) {
   lprofSetProfileDumped(0);
 }
 
-int hasCorrelation() {
+COMPILER_RT_VISIBILITY int hasCorrelation() {
   return (__llvm_profile_get_version() & VARIANT_MASK_DBG_CORRELATE) != 0ULL;
 }

llvm/lib/ProfileData/InstrProfCorrelator.cpp

@@ -74,12 +74,15 @@ InstrProfCorrelator::get(StringRef Filename, ProfCorrelatorKind FileKind) {
             "using multiple objects is not yet supported");
       Filename = *DsymObjectsOrErr->begin();
     }
-  }
-  auto BufferOrErr = errorOrToExpected(MemoryBuffer::getFile(Filename));
-  if (auto Err = BufferOrErr.takeError())
-    return std::move(Err);
+    auto BufferOrErr = errorOrToExpected(MemoryBuffer::getFile(Filename));
+    if (auto Err = BufferOrErr.takeError())
+      return std::move(Err);
 
-  return get(std::move(*BufferOrErr), FileKind);
+    return get(std::move(*BufferOrErr), FileKind);
+  }
+  return make_error<InstrProfError>(
+      instrprof_error::unable_to_correlate_profile,
+      "unsupported correlation kind (only DWARF debug info is supported)");
 }
 
 llvm::Expected<std::unique_ptr<InstrProfCorrelator>>