Fix building compilerplugins with Clang trunk towards Clang 9

...after <https://github.com/llvm/llvm-project/commit/
f19a8b05171a67a290e7d3bd6eba0c95c7b3259c> "Replace ad-hoc tracking of pattern
for an instantiated class-scope" removed
ASTContext::getClassScopeSpecializationPattern.  None of the affected plugins
are enabled by default (nor checked by
solenv/CompilerTest_compilerplugins_clang.mk), so just make sure they still
compile, leaving any potentially necessary adaptions to another commit.

Change-Id: I7102851409e78eff284b50337f7ad0f721e1e548
Reviewed-on: https://gerrit.libreoffice.org/71702Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

compilerplugins/clang/constantparam.cxx

@@ -104,8 +104,10 @@ void ConstantParam::addToCallSet(const FunctionDecl* functionDecl, int paramInde
 {
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();
 
@@ -252,8 +254,10 @@ bool ConstantParam::VisitCallExpr(const CallExpr * callExpr) {
     // work our way back to the root definition for template methods
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();
 

compilerplugins/clang/countusersofdefaultparams.cxx

@@ -93,8 +93,10 @@ void CountUsersOfDefaultParams::niceName(const FunctionDecl* functionDecl, MyFun
 {
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();
 
@@ -155,8 +157,10 @@ bool CountUsersOfDefaultParams::VisitCallExpr(const CallExpr * callExpr) {
     // work our way back to the root definition for template methods
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();
     int n = functionDecl->getNumParams() - 1;
@@ -184,8 +188,10 @@ bool CountUsersOfDefaultParams::VisitCXXConstructExpr(const CXXConstructExpr * c
     // work our way back to the root definition for template methods
     if (constructorDecl->getInstantiatedFromMemberFunction())
         constructorDecl = dyn_cast<CXXConstructorDecl>(constructorDecl->getInstantiatedFromMemberFunction());
+#if CLANG_VERSION < 90000
     else if (constructorDecl->getClassScopeSpecializationPattern())
         constructorDecl = dyn_cast<CXXConstructorDecl>(constructorDecl->getClassScopeSpecializationPattern());
+#endif
     else if (constructorDecl->getTemplateInstantiationPattern())
         constructorDecl = dyn_cast<CXXConstructorDecl>(constructorDecl->getTemplateInstantiationPattern());
     int n = constructorDecl->getNumParams() - 1;

compilerplugins/clang/expandablemethods.cxx

@@ -114,8 +114,10 @@ MyFuncInfo ExpandableMethods::niceName(const FunctionDecl* functionDecl)
 {
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();
 

compilerplugins/clang/methodcycles.cxx

@@ -126,8 +126,10 @@ MyFuncInfo MethodCycles::niceName(const FunctionDecl* functionDecl)
 {
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();
 

compilerplugins/clang/unusedmethods.cxx

@@ -132,8 +132,10 @@ MyFuncInfo UnusedMethods::niceName(const FunctionDecl* functionDecl)
 {
     if (functionDecl->getInstantiatedFromMemberFunction())
         functionDecl = functionDecl->getInstantiatedFromMemberFunction();
+#if CLANG_VERSION < 90000
     else if (functionDecl->getClassScopeSpecializationPattern())
         functionDecl = functionDecl->getClassScopeSpecializationPattern();
+#endif
     else if (functionDecl->getTemplateInstantiationPattern())
         functionDecl = functionDecl->getTemplateInstantiationPattern();