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* [gcc r12-1787] libstdc++: Ensure unrolled loops inline the lambda
@ 2021-06-24 13:34 Jonathan Wakely
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From: Jonathan Wakely @ 2021-06-24 13:34 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:8888795ad16fc5ebf112b5bac091dc1ebb6c45d1
commit r12-1787-g8888795ad16fc5ebf112b5bac091dc1ebb6c45d1
Author: Matthias Kretz <m.kretz@gsi.de>
Date: Thu Jun 24 14:20:15 2021 +0100
libstdc++: Ensure unrolled loops inline the lambda
Signed-off-by: Matthias Kretz <m.kretz@gsi.de>
libstdc++-v3/ChangeLog:
* include/experimental/bits/simd.h (__execute_on_index_sequence)
(__execute_on_index_sequence_with_return)
(__call_with_n_evaluations, __call_with_subscripts): Add flatten
attribute.
Diff:
---
libstdc++-v3/include/experimental/bits/simd.h | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/libstdc++-v3/include/experimental/bits/simd.h b/libstdc++-v3/include/experimental/bits/simd.h
index 163f1b574e2..c396ebd3ee3 100644
--- a/libstdc++-v3/include/experimental/bits/simd.h
+++ b/libstdc++-v3/include/experimental/bits/simd.h
@@ -234,7 +234,8 @@ namespace __detail
// unrolled/pack execution helpers
// __execute_n_times{{{
template <typename _Fp, size_t... _I>
- _GLIBCXX_SIMD_INTRINSIC constexpr void
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ void
__execute_on_index_sequence(_Fp&& __f, index_sequence<_I...>)
{ ((void)__f(_SizeConstant<_I>()), ...); }
@@ -254,7 +255,8 @@ template <size_t _Np, typename _Fp>
// }}}
// __generate_from_n_evaluations{{{
template <typename _R, typename _Fp, size_t... _I>
- _GLIBCXX_SIMD_INTRINSIC constexpr _R
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ _R
__execute_on_index_sequence_with_return(_Fp&& __f, index_sequence<_I...>)
{ return _R{__f(_SizeConstant<_I>())...}; }
@@ -269,7 +271,8 @@ template <size_t _Np, typename _R, typename _Fp>
// }}}
// __call_with_n_evaluations{{{
template <size_t... _I, typename _F0, typename _FArgs>
- _GLIBCXX_SIMD_INTRINSIC constexpr auto
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ auto
__call_with_n_evaluations(index_sequence<_I...>, _F0&& __f0, _FArgs&& __fargs)
{ return __f0(__fargs(_SizeConstant<_I>())...); }
@@ -285,7 +288,8 @@ template <size_t _Np, typename _F0, typename _FArgs>
// }}}
// __call_with_subscripts{{{
template <size_t _First = 0, size_t... _It, typename _Tp, typename _Fp>
- _GLIBCXX_SIMD_INTRINSIC constexpr auto
+ [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
+ auto
__call_with_subscripts(_Tp&& __x, index_sequence<_It...>, _Fp&& __fun)
{ return __fun(__x[_First + _It]...); }
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