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Teach FloatExprEvaluator to evaluate __builtin_huge_val and inf. 

llvm-svn: 57154
This commit is contained in:
Chris Lattner 2008-10-06 05:53:16 +00:00
parent c43467526d
commit 37346e081c
1 changed files with 5 additions and 3 deletions
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8
clang/lib/AST/ExprConstant.cpp
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@ -543,17 +543,19 @@ static bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) {
}
bool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) {
//Result.zextOrTrunc(getIntTypeSizeInBits(E->getType()));
const llvm::fltSemantics &Sem =
Info.Ctx.getFloatTypeSemantics(E->getType());
switch (E->isBuiltinCall()) {
default: return false;
case Builtin::BI__builtin_huge_val:
case Builtin::BI__builtin_huge_valf:
case Builtin::BI__builtin_huge_vall:
case Builtin::BI__builtin_inf:
case Builtin::BI__builtin_inff:
case Builtin::BI__builtin_infl:
// FIXME: Implement me.
default: return false;
Result = llvm::APFloat::getInf(Sem);
return true;
}
}