<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Fri, Aug 15, 2014 at 3:29 PM, Nico Weber <span dir="ltr"><<a href="mailto:nicolasweber@gmx.de" target="_blank">nicolasweber@gmx.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: nico<br>
Date: Fri Aug 15 17:29:14 2014<br>
New Revision: 215780<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=215780&view=rev" target="_blank">http://llvm.org/viewvc/llvm-project?rev=215780&view=rev</a><br>
Log:<br>
Add a RAII class for saving and restoring instantiations and uses. No behavior change.<br>
<br>
Modified:<br>
cfe/trunk/include/clang/Sema/Sema.h<br>
cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp<br>
<br>
Modified: cfe/trunk/include/clang/Sema/Sema.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Sema.h?rev=215780&r1=215779&r2=215780&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Sema.h?rev=215780&r1=215779&r2=215780&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/include/clang/Sema/Sema.h (original)<br>
+++ cfe/trunk/include/clang/Sema/Sema.h Fri Aug 15 17:29:14 2014<br>
@@ -6568,6 +6568,31 @@ public:<br>
/// but have not yet been performed.<br>
std::deque<PendingImplicitInstantiation> PendingInstantiations;<br>
<br>
+ class SavePendingInstantiationsAndVTableUsesRAII {<br>
+ public:<br>
+ SavePendingInstantiationsAndVTableUsesRAII(Sema &S): S(S) {<br>
+ SavedPendingInstantiations.swap(S.PendingInstantiations);<br>
+ SavedVTableUses.swap(S.VTableUses);<br>
+ }<br>
+<br>
+ ~SavePendingInstantiationsAndVTableUsesRAII() {<br>
+ // Restore the set of pending vtables.<br>
+ assert(S.VTableUses.empty() &&<br>
+ "VTableUses should be empty before it is discarded.");<br>
+ S.VTableUses.swap(SavedVTableUses);<br>
+<br>
+ // Restore the set of pending implicit instantiations.<br>
+ assert(S.PendingInstantiations.empty() &&<br>
+ "PendingInstantiations should be empty before it is discarded.");<br>
+ S.PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ }<br>
+<br>
+ private:<br>
+ Sema &S;<br>
+ SmallVector<VTableUse, 16> SavedVTableUses;<br>
+ std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;<br>
+ };<br>
+<br>
/// \brief The queue of implicit template instantiations that are required<br>
/// and must be performed within the current local scope.<br>
///<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp?rev=215780&r1=215779&r2=215780&view=diff" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp?rev=215780&r1=215779&r2=215780&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp Fri Aug 15 17:29:14 2014<br>
@@ -3389,13 +3389,13 @@ void Sema::InstantiateFunctionDefinition<br>
// If we're performing recursive template instantiation, create our own<br>
// queue of pending implicit instantiations that we will instantiate later,<br>
// while we're still within our own instantiation context.<br>
- SmallVector<VTableUse, 16> SavedVTableUses;<br>
- std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;<br>
SavePendingLocalImplicitInstantiationsRAII<br>
SavedPendingLocalImplicitInstantiations(*this);<br>
+ std::unique_ptr<SavePendingInstantiationsAndVTableUsesRAII><br>
+ SavePendingInstantiationsAndVTableUses;<br>
if (Recursive) {<br>
- VTableUses.swap(SavedVTableUses);<br>
- PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ SavePendingInstantiationsAndVTableUses.reset(<br>
+ new SavePendingInstantiationsAndVTableUsesRAII(*this));<br></blockquote><div><br></div><div>It seems wasteful to go to the heap for this each time; maybe instead pass a flag to the RAII object to tell it whether to do this save/load instead?</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
}<br>
<br>
EnterExpressionEvaluationContext EvalContext(*this,<br>
@@ -3466,15 +3466,8 @@ void Sema::InstantiateFunctionDefinition<br>
// instantiation of this template.<br>
PerformPendingInstantiations();<br>
<br>
- // Restore the set of pending vtables.<br>
- assert(VTableUses.empty() &&<br>
- "VTableUses should be empty before it is discarded.");<br>
- VTableUses.swap(SavedVTableUses);<br>
-<br>
- // Restore the set of pending implicit instantiations.<br>
- assert(PendingInstantiations.empty() &&<br>
- "PendingInstantiations should be empty before it is discarded.");<br>
- PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ // Restore PendingInstantiations and VTableUses.<br>
+ SavePendingInstantiationsAndVTableUses.reset();<br>
}<br>
}<br>
<br>
@@ -3790,11 +3783,11 @@ void Sema::InstantiateVariableDefinition<br>
// If we're performing recursive template instantiation, create our own<br>
// queue of pending implicit instantiations that we will instantiate<br>
// later, while we're still within our own instantiation context.<br>
- SmallVector<VTableUse, 16> SavedVTableUses;<br>
- std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;<br>
+ std::unique_ptr<SavePendingInstantiationsAndVTableUsesRAII><br>
+ SavePendingInstantiationsAndVTableUses;<br>
if (Recursive) {<br>
- VTableUses.swap(SavedVTableUses);<br>
- PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ SavePendingInstantiationsAndVTableUses.reset(<br>
+ new SavePendingInstantiationsAndVTableUsesRAII(*this));<br>
}<br>
<br>
LocalInstantiationScope Local(*this);<br>
@@ -3822,15 +3815,8 @@ void Sema::InstantiateVariableDefinition<br>
// instantiation of this template.<br>
PerformPendingInstantiations();<br>
<br>
- // Restore the set of pending vtables.<br>
- assert(VTableUses.empty() &&<br>
- "VTableUses should be empty before it is discarded.");<br>
- VTableUses.swap(SavedVTableUses);<br>
-<br>
- // Restore the set of pending implicit instantiations.<br>
- assert(PendingInstantiations.empty() &&<br>
- "PendingInstantiations should be empty before it is discarded.");<br>
- PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ // Restore PendingInstantiations and VTableUses.<br>
+ SavePendingInstantiationsAndVTableUses.reset();<br>
}<br>
}<br>
<br>
@@ -3914,13 +3900,13 @@ void Sema::InstantiateVariableDefinition<br>
// If we're performing recursive template instantiation, create our own<br>
// queue of pending implicit instantiations that we will instantiate later,<br>
// while we're still within our own instantiation context.<br>
- SmallVector<VTableUse, 16> SavedVTableUses;<br>
- std::deque<PendingImplicitInstantiation> SavedPendingInstantiations;<br>
SavePendingLocalImplicitInstantiationsRAII<br>
SavedPendingLocalImplicitInstantiations(*this);<br>
+ std::unique_ptr<SavePendingInstantiationsAndVTableUsesRAII><br>
+ SavePendingInstantiationsAndVTableUses;<br>
if (Recursive) {<br>
- VTableUses.swap(SavedVTableUses);<br>
- PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ SavePendingInstantiationsAndVTableUses.reset(<br>
+ new SavePendingInstantiationsAndVTableUsesRAII(*this));<br>
}<br>
<br>
// Enter the scope of this instantiation. We don't use<br>
@@ -3987,15 +3973,8 @@ void Sema::InstantiateVariableDefinition<br>
// instantiation of this template.<br>
PerformPendingInstantiations();<br>
<br>
- // Restore the set of pending vtables.<br>
- assert(VTableUses.empty() &&<br>
- "VTableUses should be empty before it is discarded.");<br>
- VTableUses.swap(SavedVTableUses);<br>
-<br>
- // Restore the set of pending implicit instantiations.<br>
- assert(PendingInstantiations.empty() &&<br>
- "PendingInstantiations should be empty before it is discarded.");<br>
- PendingInstantiations.swap(SavedPendingInstantiations);<br>
+ // Restore PendingInstantiations and VTableUses.<br>
+ SavePendingInstantiationsAndVTableUses.reset();<br>
}<br>
}<br>
<br>
<br>
<br>
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</blockquote></div><br></div></div>