[ASMParser] Parse FP constants in non-C locales

This patch fixes PR25788, which allows for the parsing of
floating-point constants in non-C locales.

Patch by Antoine Pitrou!

Differential Revision: http://reviews.llvm.org/D15375

llvm-svn: 271574

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/lib/AsmParser/LLLexer.cpp b/llvm/lib/AsmParser/LLLexer.cpp
index fd0081f6f97..bf457a95cd7 100644
--- a/llvm/lib/AsmParser/LLLexer.cpp
+++ b/llvm/lib/AsmParser/LLLexer.cpp
@@ -958,7 +958,8 @@ lltok::Kind LLLexer::LexDigitOrNegative() {
     }
   }
 
-  APFloatVal = APFloat(std::atof(TokStart));
+  APFloatVal = APFloat(APFloat::IEEEdouble,
+                       StringRef(TokStart, CurPtr - TokStart));
   return lltok::APFloat;
 }
 
@@ -994,6 +995,7 @@ lltok::Kind LLLexer::LexPositive() {
     }
   }
 
-  APFloatVal = APFloat(std::atof(TokStart));
+  APFloatVal = APFloat(APFloat::IEEEdouble,
+                       StringRef(TokStart, CurPtr - TokStart));
   return lltok::APFloat;
 }