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Fix Bug: test/Regression/Other/2002-04-07-InfConstant.ll

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llvm-svn: 2142
This commit is contained in:
Chris Lattner 2002-04-07 08:42:53 +00:00
parent 1c83a4a20c
commit 96135c924f
1 changed files with 12 additions and 3 deletions
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15
lib/VMCore/Constants.cpp
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@ -165,9 +165,18 @@ std::string ConstantUInt::getStrValue() const {
//
std::string ConstantFP::getStrValue() const {
std::string StrVal = ftostr(Val);
double TestVal = atof(StrVal.c_str()); // Reparse stringized version!
if (TestVal == Val)
return StrVal;
// Check to make sure that the stringized number is not some string like "Inf"
// or NaN, that atof will accept, but the lexer will not. Check that the
// string matches the "[-+]?[0-9]" regex.
//
if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
((StrVal[0] == '-' || StrVal[0] == '+') &&
(StrVal[0] >= '0' && StrVal[0] <= '9'))) {
double TestVal = atof(StrVal.c_str()); // Reparse stringized version!
if (TestVal == Val)
return StrVal;
}
// Otherwise we could not reparse it to exactly the same value, so we must
// output the string in hexadecimal format!