Modify the way sub-statements are stored and retrieved from PCH.

Before this commit, sub-stmts were stored as encountered and when they were placed in the Stmts stack we had to know what index
each stmt operand has. This complicated supporting variable sub-stmts and sub-stmts that were contained in TypeSourceInfos, e.g.

x = sizeof(int[1]);

would crash PCH.

Now, sub-stmts are stored in reverse order, from last to first, so that when reading them, in order to get the next sub-stmt we just
need to pop the last stmt from the stack. This greatly simplified the way stmts are written and read (just use PCHWriter::AddStmt and
 PCHReader::ReadStmt accordingly) and allowed variable stmt operands and TypeSourceInfo exprs.

llvm-svn: 107087

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/test/PCH/exprs.h b/clang/test/PCH/exprs.h
index 5af8c7c1a90..80768f8df24 100644
--- a/clang/test/PCH/exprs.h
+++ b/clang/test/PCH/exprs.h
@@ -72,6 +72,8 @@ typedef typeof((void *)0) void_ptr;
 // CompoundLiteral
 typedef typeof((struct S){.x = 3.5}) compound_literal;
 
+typedef typeof(i + sizeof(int[i + Enumerator])) add_result_with_typeinfo;
+
 // ExtVectorElementExpr
 typedef __attribute__(( ext_vector_type(2) )) double double2;
 extern double2 vec2, vec2b;