implement complex subtraction
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41345 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGComplexExpr.cpp b/CodeGen/CGComplexExpr.cpp
index 1597f8e..38cdd05 100644
--- a/CodeGen/CGComplexExpr.cpp
+++ b/CodeGen/CGComplexExpr.cpp
@@ -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());