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Add support for full-width 128-bit integer literals. 

llvm-svn: 156123
This commit is contained in:
Stephen Canon 2012-05-03 22:49:43 +00:00
parent 2f460ae3b4
commit fdc6c1a461
2 changed files with 25 additions and 3 deletions
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19
clang/lib/Sema/SemaExpr.cpp
View File

@ -2648,7 +2648,12 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
diag::warn_cxx98_compat_longlong : diag::ext_longlong);
// Get the value in the widest-possible width.
llvm::APInt ResultVal(Context.getTargetInfo().getIntMaxTWidth(), 0);
unsigned MaxWidth = Context.getTargetInfo().getIntMaxTWidth();
// The microsoft literal suffix extensions support 128-bit literals, which
// may be wider than [u]intmax_t.
if (Literal.isMicrosoftInteger && MaxWidth < 128)
MaxWidth = 128;
llvm::APInt ResultVal(MaxWidth, 0);
if (Literal.GetIntegerValue(ResultVal)) {
// If this value didn't fit into uintmax_t, warn and force to ull.
@ -2696,7 +2701,7 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
}
}
// Finally, check long long if needed.
// Check long long if needed.
if (Ty.isNull()) {
unsigned LongLongSize = Context.getTargetInfo().getLongLongWidth();
@ -2714,6 +2719,16 @@ ExprResult Sema::ActOnNumericConstant(const Token &Tok, Scope *UDLScope) {
}
}
// If it doesn't fit in unsigned long long, and we're using Microsoft
// extensions, then its a 128-bit integer literal.
if (Ty.isNull() && Literal.isMicrosoftInteger) {
if (Literal.isUnsigned)
Ty = Context.UnsignedInt128Ty;
else
Ty = Context.Int128Ty;
Width = 128;
}
// If we still couldn't decide a type, we probably have something that
// does not fit in a signed long long, but has no U suffix.
if (Ty.isNull()) {

9
clang/test/Sema/128bitint.c
View File

@ -1,4 +1,4 @@
// RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-apple-darwin9 %s
// RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-apple-darwin9 -fms-extensions %s
typedef int i128 __attribute__((__mode__(TI)));
typedef unsigned u128 __attribute__((__mode__(TI)));
@ -11,3 +11,10 @@ __uint128_t b = (__uint128_t)-1;
// PR11916: Support for libstdc++ 4.7
__int128 i = (__int128)0;
unsigned __int128 u = (unsigned __int128)-1;
long long SignedTooBig = 123456789012345678901234567890; // expected-warning {{integer constant is too large for its type}}
__int128_t Signed128 = 123456789012345678901234567890i128;
long long Signed64 = 123456789012345678901234567890i128; // expected-warning {{implicit conversion from '__int128' to 'long long' changes value from 123456789012345678901234567890 to -4362896299872285998}}
unsigned long long UnsignedTooBig = 123456789012345678901234567890; // expected-warning {{integer constant is too large for its type}}
__uint128_t Unsigned128 = 123456789012345678901234567890Ui128;
unsigned long long Unsigned64 = 123456789012345678901234567890Ui128; // expected-warning {{implicit conversion from 'unsigned __int128' to 'unsigned long long' changes value from 123456789012345678901234567890 to 14083847773837265618}}