[cfe-commits] r41345 - /cfe/trunk/CodeGen/CGComplexExpr.cpp

[Chris Lattner]

Author: lattner
Date: Thu Aug 23 18:46:33 2007
New Revision: 41345

URL: http://llvm.org/viewvc/llvm-project?rev=41345&view=rev
Log:
implement complex subtraction

Modified:
    cfe/trunk/CodeGen/CGComplexExpr.cpp

Modified: cfe/trunk/CodeGen/CGComplexExpr.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/CodeGen/CGComplexExpr.cpp?rev=41345&r1=41344&r2=41345&view=diff

==============================================================================
--- cfe/trunk/CodeGen/CGComplexExpr.cpp (original)
+++ cfe/trunk/CodeGen/CGComplexExpr.cpp Thu Aug 23 18:46:33 2007
@@ -106,7 +106,8 @@
   
   ComplexPairTy VisitBinMul        (const BinaryOperator *E);
   ComplexPairTy VisitBinAdd        (const BinaryOperator *E);
-  // FIXME: sub/div/rem
+  ComplexPairTy VisitBinSub        (const BinaryOperator *E);
+  // FIXME: div/rem
   // GCC rejects and/or/xor for integer complex.
   // Logical and/or always return int, never complex.
 
@@ -225,6 +226,17 @@
   return ComplexPairTy(ResR, ResI);
 }
 
+ComplexPairTy ComplexExprEmitter::VisitBinSub(const BinaryOperator *E) {
+  ComplexPairTy LHS = Visit(E->getLHS());
+  ComplexPairTy RHS = Visit(E->getRHS());
+  
+  llvm::Value *ResR = Builder.CreateSub(LHS.first,  RHS.first,  "sub.r");
+  llvm::Value *ResI = Builder.CreateSub(LHS.second, RHS.second, "sub.i");
+  
+  return ComplexPairTy(ResR, ResI);
+}
+
+
 ComplexPairTy ComplexExprEmitter::VisitBinMul(const BinaryOperator *E) {
   ComplexPairTy LHS = Visit(E->getLHS());
   ComplexPairTy RHS = Visit(E->getRHS());