Skip to content

[clang] constexpr built-in reduce and function. #116822

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Nov 20, 2024
Merged

[clang] constexpr built-in reduce and function. #116822

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5923208
constexpr reduce and
c8ef Nov 19, 2024
63e448e
add more test
c8ef Nov 20, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions clang/docs/ReleaseNotes.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -357,6 +357,7 @@ Non-comprehensive list of changes in this release

- ``__builtin_reduce_add`` function can now be used in constant expressions.
- ``__builtin_reduce_mul`` function can now be used in constant expressions.
- ``__builtin_reduce_and`` function can now be used in constant expressions.

New Compiler Flags
------------------
Expand Down
2 changes: 1 addition & 1 deletion clang/include/clang/Basic/Builtins.td
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1498,7 +1498,7 @@ def ReduceOr : Builtin {

def ReduceAnd : Builtin {
let Spellings = ["__builtin_reduce_and"];
let Attributes = [NoThrow, Const, CustomTypeChecking];
let Attributes = [NoThrow, Const, CustomTypeChecking, Constexpr];
let Prototype = "void(...)";
}

Expand Down
7 changes: 6 additions & 1 deletion clang/lib/AST/ExprConstant.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -13528,7 +13528,8 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
}

case Builtin::BI__builtin_reduce_add:
case Builtin::BI__builtin_reduce_mul: {
case Builtin::BI__builtin_reduce_mul:
case Builtin::BI__builtin_reduce_and: {
APValue Source;
if (!EvaluateAsRValue(Info, E->getArg(0), Source))
return false;
Expand All @@ -13553,6 +13554,10 @@ bool IntExprEvaluator::VisitBuiltinCallExpr(const CallExpr *E,
return false;
break;
}
case Builtin::BI__builtin_reduce_and: {
Reduced &= Source.getVectorElt(EltNum).getInt();
break;
}
}
}

Expand Down
8 changes: 8 additions & 0 deletions clang/test/Sema/constant_builtins_vector.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -765,3 +765,11 @@ constexpr long long reduceMulLong2 = __builtin_reduce_mul((vector4long){(1LL <<
// expected-note@-1 {{outside the range of representable values of type 'long long'}}
static_assert(__builtin_reduce_mul((vector4uint){~0U, 1, 1, 2}) == ~0U - 1);
static_assert(__builtin_reduce_mul((vector4ulong){~0ULL, 1, 1, 2}) == ~0ULL - 1);

static_assert(__builtin_reduce_and((vector4char){}) == 0);
static_assert(__builtin_reduce_and((vector4char){(char)0x11, (char)0x22, (char)0x44, (char)0x88}) == 0);
static_assert(__builtin_reduce_and((vector4short){(short)0x1111, (short)0x2222, (short)0x4444, (short)0x8888}) == 0);
static_assert(__builtin_reduce_and((vector4int){(int)0x11111111, (int)0x22222222, (int)0x44444444, (int)0x88888888}) == 0);
static_assert(__builtin_reduce_and((vector4long){(long long)0x1111111111111111L, (long long)0x2222222222222222L, (long long)0x4444444444444444L, (long long)0x8888888888888888L}) == 0L);
static_assert(__builtin_reduce_and((vector4uint){0x11111111U, 0x22222222U, 0x44444444U, 0x88888888U}) == 0U);
static_assert(__builtin_reduce_and((vector4ulong){0x1111111111111111UL, 0x2222222222222222UL, 0x4444444444444444UL, 0x8888888888888888UL}) == 0L);
Loading