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Expose __builtin_bswap16. 

GCC has always supported this on PowerPC and 4.8 supports it on all platforms,
so it's a good idea to expose it in clang too. LLVM supports this on all targets.

llvm-svn: 165362
This commit is contained in:
Benjamin Kramer 2012-10-06 14:42:22 +00:00
parent 68e2c7bee3
commit a801f4a81d
6 changed files with 10 additions and 4 deletions
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1
clang/include/clang/Basic/Builtins.def
View File

@ -388,6 +388,7 @@ BUILTIN(__builtin_popcountll, "iULLi", "nc")
// FIXME: These type signatures are not correct for targets with int != 32-bits
// or with ULL != 64-bits.
BUILTIN(__builtin_bswap16, "UsUs", "nc")
BUILTIN(__builtin_bswap32, "UiUi", "nc")
BUILTIN(__builtin_bswap64, "ULLiULLi", "nc")

1
clang/lib/AST/ExprConstant.cpp
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@ -4296,6 +4296,7 @@ bool IntExprEvaluator::VisitCallExpr(const CallExpr *E) {
return Error(E);
}
case Builtin::BI__builtin_bswap16:
case Builtin::BI__builtin_bswap32:
case Builtin::BI__builtin_bswap64: {
APSInt Val;

1
clang/lib/CodeGen/CGBuiltin.cpp
View File

@ -356,6 +356,7 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
"expval");
return RValue::get(Result);
}
case Builtin::BI__builtin_bswap16:
case Builtin::BI__builtin_bswap32:
case Builtin::BI__builtin_bswap64: {
Value *ArgValue = EmitScalarExpr(E->getArg(0));

1
clang/test/CodeGen/builtins.c
View File

@ -113,6 +113,7 @@ int main() {
// Whatever
P(bswap16, (N));
P(bswap32, (N));
P(bswap64, (N));
// FIXME

5
clang/test/Sema/constant-builtins-2.c
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@ -48,8 +48,9 @@ extern int f();
int h0 = __builtin_types_compatible_p(int, float);
//int h1 = __builtin_choose_expr(1, 10, f());
//int h2 = __builtin_expect(0, 0);
int h3 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
int h4 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
int h3 = __builtin_bswap16(0x1234) == 0x3412 ? 1 : f();
int h4 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
int h5 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
extern long int bi0;
extern __typeof__(__builtin_expect(0, 0)) bi0;

5
clang/test/Sema/constant-builtins.c
View File

@ -16,8 +16,9 @@ extern int f();
int h0 = __builtin_types_compatible_p(int,float);
//int h1 = __builtin_choose_expr(1, 10, f());
//int h2 = __builtin_expect(0, 0);
int h3 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
int h4 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
int h3 = __builtin_bswap16(0x1234) == 0x3412 ? 1 : f();
int h4 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
int h5 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
short somefunc();