Fix case and simplify test file.

Author: tianleliu

llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp

@@ -1093,7 +1093,7 @@ bool DevirtModule::tryFindVirtualCallTargets(
     std::vector<VirtualCallTarget> &TargetsForSlot,
     const std::set<TypeMemberInfo> &TypeMemberInfos, uint64_t ByteOffset,
     ModuleSummaryIndex *ExportSummary) {
-  bool hasAvailableExternally = false;
+  bool HasAvailableExternally = false;
   for (const TypeMemberInfo &TM : TypeMemberInfos) {
     if (!TM.Bits->GV->isConstant())
       return false;
@@ -1106,11 +1106,11 @@ bool DevirtModule::tryFindVirtualCallTargets(
 
     // Record if the first GV is AvailableExternally
     if (TargetsForSlot.empty())
-      hasAvailableExternally = TM.Bits->GV->hasAvailableExternallyLinkage();
+      HasAvailableExternally = TM.Bits->GV->hasAvailableExternallyLinkage();
 
     // When the first GV is AvailableExternally, check if all other GVs are
     // also AvailableExternally. If they are not the same, return false.
-    if (!TargetsForSlot.empty() && hasAvailableExternally &&
+    if (!TargetsForSlot.empty() && HasAvailableExternally &&
         !TM.Bits->GV->hasAvailableExternallyLinkage())
       return false;
 

llvm/test/Transforms/WholeProgramDevirt/availableexternal-check.ll

@@ -8,7 +8,7 @@
 ; };
 ; long test(std::exception *p) {
 ;   const char* ch = p->what();
-;   return std::strlen(ch);
+;   ...;
 ; }
 ;
 ; Build command is "clang++ -O2 -target x86_64-unknown-linux -flto=thin \
@@ -21,8 +21,8 @@
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux"
 
-@_ZTVSt9exception = available_externally constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr null, ptr null, ptr null, ptr @_ZNKSt9exception4whatEv] }, !type !0, !type !1, !vcall_visibility !2
-@_ZTV1A.0 = constant [5 x ptr] [ptr null, ptr null, ptr null, ptr null, ptr @_ZNK1A4whatEv], !type !3, !type !4, !type !5, !type !6, !vcall_visibility !2
+@_ZTVSt9exception = available_externally constant { [5 x ptr] } { [5 x ptr] [ptr null, ptr null, ptr null, ptr null, ptr @_ZNKSt9exception4whatEv] }, !type !0, !type !1
+@_ZTV1A.0 = constant [5 x ptr] [ptr null, ptr null, ptr null, ptr null, ptr @_ZNK1A4whatEv], !type !3, !type !4, !type !5, !type !6
 
 declare ptr @_ZNKSt9exception4whatEv()
 
@@ -50,7 +50,6 @@ attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memo
 
 !0 = !{i64 16, !"_ZTSSt9exception"}
 !1 = !{i64 32, !"_ZTSMSt9exceptionKDoFPKcvE.virtual"}
-!2 = !{i64 1}
 !3 = !{i32 16, !"_ZTS1A"}
 !4 = !{i32 32, !"_ZTSM1AKDoFPKcvE.virtual"}
 !5 = !{i32 16, !"_ZTSSt9exception"}