Split complex arithmetic codegen out from aggregate codegen.

This means that we get rid of tons of intermediate allocas.  For
example:

void foo(double _Complex a, double _Complex b) {
   a = b+a+a;
}

this used to have 4 temporary allocas, now it has zero of them.
This also simplifies the individual visitor methods because they
now can all operate on real/imag pairs instead of having to 
load/store all over the place.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41217 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/CodeGen/CodeGenFunction.h b/CodeGen/CodeGenFunction.h
index ca391b01ad..47bdbacbb8 100644
--- a/CodeGen/CodeGenFunction.h
+++ b/CodeGen/CodeGenFunction.h
@@ -413,6 +413,10 @@ public:
   /// aggregate type.  The result is computed into DestPtr.  Note that if
   /// DestPtr is null, the value of the aggregate expression is not needed.
   void EmitAggExpr(const Expr *E, llvm::Value *DestPtr, bool VolatileDest);
+  
+  /// EmitComplexExpr - Emit the computation of the specified expression of
+  /// complex type, ignoring the result.
+  void EmitComplexExpr(const Expr *E);
 };
 }  // end namespace CodeGen
 }  // end namespace clang