[OptDiag] Remove non-printable chars from function name

The r283656 did this in the remark arguments.  We also need to do this
in the main function attribute as that is written to YAML as well.

llvm-svn: 286482

lib/Analysis/OptimizationDiagnosticInfo.cpp

@@ -80,7 +80,8 @@ template <> struct MappingTraits<DiagnosticInfoOptimizationBase *> {
 
     // These are read-only for now.
     DebugLoc DL = OptDiag->getDebugLoc();
-    StringRef FN = OptDiag->getFunction().getName();
+    StringRef FN = GlobalValue::getRealLinkageName(
+        OptDiag->getFunction().getName());
 
     StringRef PassName(OptDiag->PassName);
     io.mapRequired("Pass", PassName);

test/Transforms/Inline/optimization-remarks-yaml.ll

@@ -49,7 +49,7 @@ target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-apple-macosx10.11.0"
 
 ; Function Attrs: nounwind ssp uwtable
-define i32 @baz() !dbg !7 !prof !14 {
+define i32 @"\01baz"() !dbg !7 !prof !14 {
 entry:
   %call = call i32 (...) @foo(), !dbg !9
   %call1 = call i32 (...) @"\01bar"(), !dbg !10