Handle emitting __builtin_huge_valf as a constant expr.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@55299 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 5107a56..a7e49d0 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -161,7 +161,8 @@
// We have a builtin that is a constant expression
return builtinID == Builtin::BI__builtin___CFStringMakeConstantString ||
- builtinID == Builtin::BI__builtin_classify_type;
+ builtinID == Builtin::BI__builtin_classify_type ||
+ builtinID == Builtin::BI__builtin_huge_valf;
}
bool CallExpr::isBuiltinClassifyType(llvm::APSInt &Result) const {
diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index 9f94d42..e0c39c9 100644
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -606,6 +606,20 @@
return Visit(E->getRHS());
}
+
+ llvm::Constant *VisitCallExpr(const CallExpr *E) {
+ if (const ImplicitCastExpr *IcExpr =
+ dyn_cast<const ImplicitCastExpr>(E->getCallee()))
+ if (const DeclRefExpr *DRExpr =
+ dyn_cast<const DeclRefExpr>(IcExpr->getSubExpr()))
+ if (const FunctionDecl *FDecl =
+ dyn_cast<const FunctionDecl>(DRExpr->getDecl()))
+ if (unsigned builtinID = FDecl->getIdentifier()->getBuiltinID())
+ return EmitBuiltinExpr(builtinID, E);
+
+ CGM.ErrorUnsupported(E, "constant call expression");
+ return llvm::Constant::getNullValue(ConvertType(E->getType()));
+ }
// Utility methods
const llvm::Type *ConvertType(QualType T) {
@@ -805,6 +819,20 @@
return llvm::UndefValue::get(Ty);
}
+ llvm::Constant *EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E)
+ {
+ switch (BuiltinID) {
+ default:
+ CGM.ErrorUnsupported(E, "constant builtin function");
+ return 0;
+ case Builtin::BI__builtin_huge_valf: {
+ const llvm::fltSemantics &Sem =
+ CGM.getContext().getFloatTypeSemantics(E->getType());
+ return llvm::ConstantFP::get(llvm::APFloat::getInf(Sem));
+ }
+ }
+ }
+
};
} // end anonymous namespace.