commit 2823c195ee65caf4042dc512c62df811c82dfbc1
author Chris Lattner <sabre@nondot.org> Tue Aug 21 16:34:16 2007 +0000
committer Chris Lattner <sabre@nondot.org> Tue Aug 21 16:34:16 2007 +0000
tree 59c82be08fff938c8ae6016eb829cf8f13357cdb
parent 2f9d5fe98ed64343116f45eb67c7048ebff4ec69

reimplement complex mul


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41226 91177308-0d34-0410-b5e6-96231b3b80d8

CodeGen/CGComplexExpr.cpp

diff --git a/CodeGen/CGComplexExpr.cpp b/CodeGen/CGComplexExpr.cpp
index a6e6c06..8c93ca3 100644
--- a/CodeGen/CGComplexExpr.cpp
+++ b/CodeGen/CGComplexExpr.cpp
@@ -68,6 +68,7 @@
   //  case Expr::CastExprClass: 
   //  case Expr::CallExprClass:
   ComplexPairTy VisitBinaryOperator(const BinaryOperator *BO);
+  ComplexPairTy VisitBinMul        (const BinaryOperator *E);
   ComplexPairTy VisitBinAdd        (const BinaryOperator *E);
   ComplexPairTy VisitBinAssign     (const BinaryOperator *E);
 
@@ -231,7 +232,6 @@
 }
 
 ComplexPairTy ComplexExprEmitter::VisitBinAdd(const BinaryOperator *E) {
-  // This must be a complex number.
   ComplexPairTy LHS = Visit(E->getLHS());
   ComplexPairTy RHS = Visit(E->getRHS());
   
@@ -241,6 +241,21 @@
   return ComplexPairTy(ResR, ResI);
 }
 
+ComplexPairTy ComplexExprEmitter::VisitBinMul(const BinaryOperator *E) {
+  ComplexPairTy LHS = Visit(E->getLHS());
+  ComplexPairTy RHS = Visit(E->getRHS());
+  
+  llvm::Value *ResRl = CGF.Builder.CreateMul(LHS.first, RHS.first, "mul.rl");
+  llvm::Value *ResRr = CGF.Builder.CreateMul(LHS.second, RHS.second, "mul.rr");
+  llvm::Value *ResR  = CGF.Builder.CreateSub(ResRl, ResRr, "mul.r");
+  
+  llvm::Value *ResIl = CGF.Builder.CreateMul(LHS.second, RHS.first, "mul.il");
+  llvm::Value *ResIr = CGF.Builder.CreateMul(LHS.first, RHS.second, "mul.ir");
+  llvm::Value *ResI  = CGF.Builder.CreateAdd(ResIl, ResIr, "mul.i");
+
+  return ComplexPairTy(ResR, ResI);
+}
+
 ComplexPairTy ComplexExprEmitter::VisitBinAssign(const BinaryOperator *E) {
   assert(E->getLHS()->getType().getCanonicalType() ==
          E->getRHS()->getType().getCanonicalType() && "Invalid assignment");