commit e0762c92110dfdcdd207db461a4ea17afd168f1e
author Douglas Gregor <dgregor@apple.com> Fri Jun 19 23:52:42 2009 +0000
committer Douglas Gregor <dgregor@apple.com> Fri Jun 19 23:52:42 2009 +0000
tree ca454873887ffee6570e846ff9e56289360f18f2
parent 7d5c74ecbbd8719436c071f38657bc8e97ee4a24

Keep track of when declarations are "used" according to C and
C++. This logic is required to trigger implicit instantiation of
function templates and member functions of class templates, which will
be implemented separately.

This commit includes support for -Wunused-parameter, printing warnings
for named parameters that are not used within a function/Objective-C
method/block. Fixes <rdar://problem/6505209>.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73797 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Frontend/PCHWriterDecl.cpp

diff --git a/lib/Frontend/PCHWriterDecl.cpp b/lib/Frontend/PCHWriterDecl.cpp
index 55cff66..5173ce3 100644
--- a/lib/Frontend/PCHWriterDecl.cpp
+++ b/lib/Frontend/PCHWriterDecl.cpp
@@ -82,6 +82,7 @@
   Record.push_back(D->isInvalidDecl());
   Record.push_back(D->hasAttrs());
   Record.push_back(D->isImplicit());
+  Record.push_back(D->isUsed());
   Record.push_back(D->getAccess());
 }
 
@@ -360,6 +361,7 @@
   // know are true of all PARM_VAR_DECLs.
   if (!D->hasAttrs() &&
       !D->isImplicit() &&
+      !D->isUsed() &&
       D->getAccess() == AS_none &&
       D->getStorageClass() == 0 &&
       !D->hasCXXDirectInitializer() && // Can params have this ever?
@@ -434,6 +436,7 @@
   Abv->Add(BitCodeAbbrevOp(0));                       // isInvalidDecl (!?)
   Abv->Add(BitCodeAbbrevOp(0));                       // HasAttrs
   Abv->Add(BitCodeAbbrevOp(0));                       // isImplicit
+  Abv->Add(BitCodeAbbrevOp(0));                       // isUsed
   Abv->Add(BitCodeAbbrevOp(AS_none));                 // C++ AccessSpecifier
   
   // NamedDecl