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In Microsoft mode, force 64 bit hex integer constants to signed type if the LL or i64 suffix is used. This MSVC behavior. 

For example:

void f(long long){ printf("long long"); }
void f(unsigned long long) { printf("unsigned long long"); }
int main() {
   f(0xffffffffffffffffLL);
}
Will print "long long" using MSVC.

This patch also fixes 16 compile errors related to overloading issues when parsing the MSVC 2008 C++ standard lib.

llvm-svn: 123231
This commit is contained in:
Francois Pichet 2011-01-11 12:23:00 +00:00
parent 12df1dc8f2
commit bf711d90ed
2 changed files with 15 additions and 1 deletions
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3
clang/lib/Sema/SemaExpr.cpp
View File

@ -2497,7 +2497,8 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok) {
// Does it fit in a unsigned long long?
if (ResultVal.isIntN(LongLongSize)) {
// Does it fit in a signed long long?
if (!Literal.isUnsigned && ResultVal[LongLongSize-1] == 0)
if (!Literal.isUnsigned && (ResultVal[LongLongSize-1] == 0 ||
(getLangOptions().Microsoft && Literal.isLongLong)))
Ty = Context.LongLongTy;
else if (AllowUnsigned)
Ty = Context.UnsignedLongLongTy;

13
clang/test/Sema/MicrosoftExtensions.cpp Normal file
View File

@ -0,0 +1,13 @@
// RUN: %clang_cc1 %s -fsyntax-only -Wno-unused-value -Wmicrosoft -fms-extensions -verify
void f(long long);
void f(int);
int main()
{
// This is an ambiguous call in standard C++.
// This calls f(long long) in Microsoft mode because LL is always signed.
f(0xffffffffffffffffLL);
f(0xffffffffffffffffi64);
}