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Fix test suite regression, getFloatTypeSemantics shouldn't be called 

on non-float types.

llvm-svn: 57477
This commit is contained in:
Daniel Dunbar 2008-10-14 05:41:12 +00:00
parent 5460374cd9
commit 1be9f88a2f
1 changed files with 6 additions and 4 deletions
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10
clang/lib/AST/ExprConstant.cpp
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@ -596,9 +596,6 @@ static bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) {
}
bool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) {
const llvm::fltSemantics &Sem =
Info.Ctx.getFloatTypeSemantics(E->getType());
switch (E->isBuiltinCall()) {
default: return false;
case Builtin::BI__builtin_huge_val:
@ -606,9 +603,12 @@ bool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) {
case Builtin::BI__builtin_huge_vall:
case Builtin::BI__builtin_inf:
case Builtin::BI__builtin_inff:
case Builtin::BI__builtin_infl:
case Builtin::BI__builtin_infl: {
const llvm::fltSemantics &Sem =
Info.Ctx.getFloatTypeSemantics(E->getType());
Result = llvm::APFloat::getInf(Sem);
return true;
}
case Builtin::BI__builtin_nan:
case Builtin::BI__builtin_nanf:
@ -618,6 +618,8 @@ bool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) {
if (const StringLiteral *S =
dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenCasts())) {
if (!S->isWide() && S->getByteLength() == 0) { // empty string.
const llvm::fltSemantics &Sem =
Info.Ctx.getFloatTypeSemantics(E->getType());
Result = llvm::APFloat::getNaN(Sem);
return true;
}