Switch constant evaluation of float casts over to cast kinds.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@128251 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 3 deletions

diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index c44428b0f1..9ce98b7e57 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -2166,7 +2166,15 @@ bool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) {
 bool FloatExprEvaluator::VisitCastExpr(CastExpr *E) {
   Expr* SubExpr = E->getSubExpr();
 
-  if (SubExpr->getType()->isIntegralOrEnumerationType()) {
+  switch (E->getCastKind()) {
+  default:
+    return false;
+
+  case CK_LValueToRValue:
+  case CK_NoOp:
+    return Visit(SubExpr);
+
+  case CK_IntegralToFloating: {
     APSInt IntResult;
     if (!EvaluateInteger(SubExpr, IntResult, Info))
       return false;
@@ -2174,7 +2182,8 @@ bool FloatExprEvaluator::VisitCastExpr(CastExpr *E) {
                                   IntResult, Info.Ctx);
     return true;
   }
-  if (SubExpr->getType()->isRealFloatingType()) {
+
+  case CK_FloatingCast: {
     if (!Visit(SubExpr))
       return false;
     Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(),
@@ -2182,13 +2191,14 @@ bool FloatExprEvaluator::VisitCastExpr(CastExpr *E) {
     return true;
   }
 
-  if (E->getCastKind() == CK_FloatingComplexToReal) {
+  case CK_FloatingComplexToReal: {
     ComplexValue V;
     if (!EvaluateComplex(SubExpr, V, Info))
       return false;
     Result = V.getComplexFloatReal();
     return true;
   }
+  }
 
   return false;
 }