[sanitizer-coverage] one more flavor of coverage: -fsanitize-coverage=inline-8bit-counters. Experimental so far, not documenting yet. Reapplying revisions 304630, 304631, 304632, 304673, see PR33308 

llvm-svn: 305026
diff --git a/clang/lib/CodeGen/BackendUtil.cpp b/clang/lib/CodeGen/BackendUtil.cpp
index 5911488..fd193bc 100644
--- a/clang/lib/CodeGen/BackendUtil.cpp
+++ b/clang/lib/CodeGen/BackendUtil.cpp
@@ -187,6 +187,7 @@
   Opts.TracePC = CGOpts.SanitizeCoverageTracePC;
   Opts.TracePCGuard = CGOpts.SanitizeCoverageTracePCGuard;
   Opts.NoPrune = CGOpts.SanitizeCoverageNoPrune;
+  Opts.Inline8bitCounters = CGOpts.SanitizeCoverageInline8bitCounters;
   PM.add(createSanitizerCoverageModulePass(Opts));
 }