Optimize Declarator to avoid malloc/free traffic for the argument list of a

function DeclaratorChunk in common cases.  This uses a fixed array in 
Declarator when it is small enough for the first function declarator chunk
in a declarator.

This eliminates all malloc/free traffic from DeclaratorChunk::getFunction
when running on Cocoa.h except for five functions: signal/bsd_signal/sigset,
which have multiple Function DeclChunk's, and 
CFUUIDCreateWithBytes/CFUUIDGetConstantUUIDWithBytes, which take more than
16 arguments.

This patch was pair programmed with Steve.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@62599 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index dc95c381d5..38518557a3 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -1222,7 +1222,8 @@ Parser::OwningExprResult Parser::ParseBlockLiteralExpression() {
   } else {
     // Otherwise, pretend we saw (void).
     ParamInfo.AddTypeInfo(DeclaratorChunk::getFunction(true, false,
-                                                       0, 0, 0, CaretLoc));
+                                                       0, 0, 0, CaretLoc,
+                                                       ParamInfo));
   }
 
   // Inform sema that we are starting a block.