Rename the cfguard module flag to cfguardtable

The previous name sounds like it inserts cfguard implementation, but it
really just emits the table of address-taken functions. Change the name
to better reflect that.

Clang will be updated in the next commit.

llvm-svn: 339419
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 9bbc77b..0271e21 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -363,7 +363,7 @@
                                    DWARFGroupName, DWARFGroupDescription));
 
   if (mdconst::extract_or_null<ConstantInt>(
-          MMI->getModule()->getModuleFlag("cfguard")))
+          MMI->getModule()->getModuleFlag("cfguardtable")))
     Handlers.push_back(HandlerInfo(new WinCFGuard(this), CFGuardName,
                                    CFGuardDescription, DWARFGroupName,
                                    DWARFGroupDescription));
diff --git a/llvm/test/CodeGen/WinCFGuard/cfguard.ll b/llvm/test/CodeGen/WinCFGuard/cfguard.ll
index 128bab1..b0a7193 100644
--- a/llvm/test/CodeGen/WinCFGuard/cfguard.ll
+++ b/llvm/test/CodeGen/WinCFGuard/cfguard.ll
@@ -157,6 +157,6 @@
 !llvm.module.flags = !{!0, !1}
 !llvm.ident = !{!2}
 
-!0 = !{i32 2, !"cfguard", i32 1}
+!0 = !{i32 2, !"cfguardtable", i32 1}
 !1 = !{i32 1, !"wchar_size", i32 2}
 !2 = !{!"clang version 6.0.0 "}