Implementation of __builtin_shufflevector, a portable builtin capable of

expressing the full flexibility of the LLVM shufflevector instruction.  
The expected immediate usage is in *mmintrin.h, so that they don't 
depend on the mess of gcc-inherited (and not completely implemented)
shuffle builtins.

llvm-svn: 51113

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index 2ac30b4c8cb..45c6a8721f8 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -500,6 +500,7 @@ Expr *Expr::IgnoreParenCasts() {
 
 
 bool Expr::isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const {
+  return true;
   switch (getStmtClass()) {
   default:
     if (Loc) *Loc = getLocStart();
@@ -1363,6 +1364,14 @@ Stmt::child_iterator OverloadExpr::child_end() {
   return reinterpret_cast<Stmt**>(&SubExprs[NumExprs]);
 }
 
+// ShuffleVectorExpr
+Stmt::child_iterator ShuffleVectorExpr::child_begin() {
+  return reinterpret_cast<Stmt**>(&SubExprs[0]);
+}
+Stmt::child_iterator ShuffleVectorExpr::child_end() {
+  return reinterpret_cast<Stmt**>(&SubExprs[NumExprs]);
+}
+
 // VAArgExpr
 Stmt::child_iterator VAArgExpr::child_begin() {
   return reinterpret_cast<Stmt**>(&Val);