COMPMID-3069: Improve build time by splitting up ToolchainSupport.h

Split out the parts of ToolchainSupport coming from <memory> and
the parts coming from <string> into their own new header files.
This accounts for 99% of uses of ToolchainSupport, which means that
expensive header files such as arm_neon.h don't need to be included
everywhere.

Knocks about 10% of compilation time off kernel files.

Signed-off-by: Matthew Bentham <matthew.bentham@arm.com>
Change-Id: I2ae718fe766b5ff28608812b0f686f30eeac1b21
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/2852
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>

3 files changed, 311 insertions, 240 deletions

diff --git a/support/MemorySupport.h b/support/MemorySupport.h
new file mode 100644
index 0000000000..5ae5501371
--- /dev/null
+++ b/support/MemorySupport.h
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2017-2020 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_SUPPORT_MEMORYSUPPORT
+#define ARM_COMPUTE_SUPPORT_MEMORYSUPPORT
+
+#include <memory>
+
+namespace arm_compute
+{
+namespace support
+{
+namespace cpp11
+{
+// std::align is missing in GCC 4.9
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57350
+inline void *align(std::size_t alignment, std::size_t size, void *&ptr, std::size_t &space)
+{
+    std::uintptr_t pn      = reinterpret_cast<std::uintptr_t>(ptr);
+    std::uintptr_t aligned = (pn + alignment - 1) & -alignment;
+    std::size_t    padding = aligned - pn;
+    if(space < size + padding)
+    {
+        return nullptr;
+    }
+
+    space -= padding;
+
+    return ptr = reinterpret_cast<void *>(aligned);
+}
+} //namespace cpp11
+namespace cpp14
+{
+/** make_unique is missing in CPP11. Re-implement it according to the standard proposal. */
+
+/**<Template for single object */
+template <class T>
+struct _Unique_if
+{
+    typedef std::unique_ptr<T> _Single_object; /**< Single object type */
+};
+
+/** Template for array */
+template <class T>
+struct _Unique_if<T[]>
+{
+    typedef std::unique_ptr<T[]> _Unknown_bound; /**< Array type */
+};
+
+/** Template for array with known bounds (to throw an error).
+ *
+ * @note this is intended to never be hit.
+ */
+template <class T, size_t N>
+struct _Unique_if<T[N]>
+{
+    typedef void _Known_bound; /**< Should never be used */
+};
+
+/** Construct a single object and return a unique pointer to it.
+ *
+ * @param[in] args Constructor arguments.
+ *
+ * @return a unique pointer to the new object.
+ */
+template <class T, class... Args>
+typename _Unique_if<T>::_Single_object
+make_unique(Args &&... args)
+{
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+
+/** Construct an array of objects and return a unique pointer to it.
+ *
+ * @param[in] n Array size
+ *
+ * @return a unique pointer to the new array.
+ */
+template <class T>
+typename _Unique_if<T>::_Unknown_bound
+make_unique(size_t n)
+{
+    typedef typename std::remove_extent<T>::type U;
+    return std::unique_ptr<T>(new U[n]());
+}
+
+/** It is invalid to attempt to make_unique an array with known bounds. */
+template <class T, class... Args>
+typename _Unique_if<T>::_Known_bound
+make_unique(Args &&...) = delete;
+} // namespace cpp14
+} // namespace support
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_SUPPORT_MEMORYSUPPORT */
diff --git a/support/StringSupport.h b/support/StringSupport.h
new file mode 100644
index 0000000000..2bd398753f
--- /dev/null
+++ b/support/StringSupport.h
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2017-2020 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_TEST_STRINGSUPPORT
+#define ARM_COMPUTE_TEST_STRINGSUPPORT
+
+#include <cassert>
+#include <memory>
+#include <sstream>
+#include <string>
+
+namespace arm_compute
+{
+namespace support
+{
+namespace cpp11
+{
+enum class NumericBase
+{
+    BASE_10,
+    BASE_16
+};
+
+/** Convert string values to integer.
+ *
+ * @note This function implements the same behaviour as std::stoi. The latter
+ *       is missing in some Android toolchains.
+ *
+ * @param[in] str  String to be converted to int.
+ * @param[in] pos  If idx is not a null pointer, the function sets the value of pos to the position of the first character in str after the number.
+ * @param[in] base Numeric base used to interpret the string.
+ *
+ * @return Integer representation of @p str.
+ */
+inline int stoi(const std::string &str, std::size_t *pos = 0, NumericBase base = NumericBase::BASE_10)
+{
+    assert(base == NumericBase::BASE_10 || base == NumericBase::BASE_16);
+    unsigned int      x;
+    std::stringstream ss;
+    if(base == NumericBase::BASE_16)
+    {
+        ss << std::hex;
+    }
+    ss << str;
+    ss >> x;
+
+    if(pos)
+    {
+        std::string       s;
+        std::stringstream ss_p;
+
+        ss_p << x;
+        ss_p >> s;
+        *pos = s.length();
+    }
+
+    return x;
+}
+
+/** Convert string values to unsigned long.
+ *
+ * @note This function implements the same behaviour as std::stoul. The latter
+ *       is missing in some Android toolchains.
+ *
+ * @param[in] str  String to be converted to unsigned long.
+ * @param[in] pos  If idx is not a null pointer, the function sets the value of pos to the position of the first character in str after the number.
+ * @param[in] base Numeric base used to interpret the string.
+ *
+ * @return Unsigned long representation of @p str.
+ */
+inline unsigned long stoul(const std::string &str, std::size_t *pos = 0, NumericBase base = NumericBase::BASE_10)
+{
+    assert(base == NumericBase::BASE_10 || base == NumericBase::BASE_16);
+    std::stringstream stream;
+    unsigned long     value = 0;
+    if(base == NumericBase::BASE_16)
+    {
+        stream << std::hex;
+    }
+    stream << str;
+    stream >> value;
+
+    if(pos)
+    {
+        std::string       s;
+        std::stringstream ss_p;
+
+        ss_p << value;
+        ss_p >> s;
+        *pos = s.length();
+    }
+
+    return value;
+}
+
+#if(__ANDROID__ || BARE_METAL)
+/** Convert integer and float values to string.
+ *
+ * @note This function implements the same behaviour as std::to_string. The
+ *       latter is missing in some Android toolchains.
+ *
+ * @param[in] value Value to be converted to string.
+ *
+ * @return String representation of @p value.
+ */
+template <typename T, typename std::enable_if<std::is_arithmetic<typename std::decay<T>::type>::value, int>::type = 0>
+inline std::string to_string(T && value)
+{
+    std::stringstream stream;
+    stream << std::forward<T>(value);
+    return stream.str();
+}
+
+/** Convert string values to float.
+ *
+ * @note This function implements the same behaviour as std::stof. The latter
+ *       is missing in some Android toolchains.
+ *
+ * @param[in] str String to be converted to float.
+ *
+ * @return Float representation of @p str.
+ */
+inline float stof(const std::string &str)
+{
+    std::stringstream stream(str);
+    float             value = 0.f;
+    stream >> value;
+    return value;
+}
+
+#else /* (__ANDROID__ || BARE_METAL) */
+/** Convert integer and float values to string.
+ *
+ * @note This function acts as a convenience wrapper around std::to_string. The
+ *       latter is missing in some Android toolchains.
+ *
+ * @param[in] value Value to be converted to string.
+ *
+ * @return String representation of @p value.
+ */
+template <typename T>
+inline std::string to_string(T &&value)
+{
+    return ::std::to_string(std::forward<T>(value));
+}
+
+/** Convert string values to float.
+ *
+ * @note This function acts as a convenience wrapper around std::stof. The
+ *       latter is missing in some Android toolchains.
+ *
+ * @param[in] args Arguments forwarded to std::stof.
+ *
+ * @return Float representation of input string.
+ */
+template <typename... Ts>
+int stof(Ts &&... args)
+{
+    return ::std::stof(std::forward<Ts>(args)...);
+}
+
+#endif /* (__ANDROID__ || BARE_METAL) */
+
+inline std::string to_string(bool value)
+{
+    std::stringstream str;
+    str << std::boolalpha << value;
+    return str.str();
+}
+
+} // namespace cpp11
+} // namespace support
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_TEST_STRINGSUPPORT */
diff --git a/support/ToolchainSupport.h b/support/ToolchainSupport.h
index 923a9cbfe0..8235358c39 100644
--- a/support/ToolchainSupport.h
+++ b/support/ToolchainSupport.h
@@ -21,16 +21,14 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef ARM_COMPUTE_TEST_TOOLCHAINSUPPORT
-#define ARM_COMPUTE_TEST_TOOLCHAINSUPPORT
+#ifndef ARM_COMPUTE_SUPPORT_TOOLCHAINSUPPORT
+#define ARM_COMPUTE_SUPPORT_TOOLCHAINSUPPORT
 
-#include <algorithm>
 #include <cassert>
 #include <cmath>
 #include <cstddef>
 #include <limits>
 #include <memory>
-#include <numeric>
 #include <sstream>
 #include <string>
 #include <type_traits>
@@ -48,134 +46,13 @@ namespace support
 {
 namespace cpp11
 {
-enum class NumericBase
-{
-    BASE_10,
-    BASE_16
-};
-
-/** Convert string values to integer.
- *
- * @note This function implements the same behaviour as std::stoi. The latter
- *       is missing in some Android toolchains.
- *
- * @param[in] str  String to be converted to int.
- * @param[in] pos  If idx is not a null pointer, the function sets the value of pos to the position of the first character in str after the number.
- * @param[in] base Numeric base used to interpret the string.
- *
- * @return Integer representation of @p str.
- */
-inline int stoi(const std::string &str, std::size_t *pos = 0, NumericBase base = NumericBase::BASE_10)
-{
-    assert(base == NumericBase::BASE_10 || base == NumericBase::BASE_16);
-    unsigned int      x;
-    std::stringstream ss;
-    if(base == NumericBase::BASE_16)
-    {
-        ss << std::hex;
-    }
-    ss << str;
-    ss >> x;
-
-    if(pos)
-    {
-        std::string       s;
-        std::stringstream ss_p;
-
-        ss_p << x;
-        ss_p >> s;
-        *pos = s.length();
-    }
-
-    return x;
-}
-
-/** Convert string values to unsigned long.
- *
- * @note This function implements the same behaviour as std::stoul. The latter
- *       is missing in some Android toolchains.
- *
- * @param[in] str  String to be converted to unsigned long.
- * @param[in] pos  If idx is not a null pointer, the function sets the value of pos to the position of the first character in str after the number.
- * @param[in] base Numeric base used to interpret the string.
- *
- * @return Unsigned long representation of @p str.
- */
-inline unsigned long stoul(const std::string &str, std::size_t *pos = 0, NumericBase base = NumericBase::BASE_10)
-{
-    assert(base == NumericBase::BASE_10 || base == NumericBase::BASE_16);
-    std::stringstream stream;
-    unsigned long     value = 0;
-    if(base == NumericBase::BASE_16)
-    {
-        stream << std::hex;
-    }
-    stream << str;
-    stream >> value;
-
-    if(pos)
-    {
-        std::string       s;
-        std::stringstream ss_p;
-
-        ss_p << value;
-        ss_p >> s;
-        *pos = s.length();
-    }
-
-    return value;
-}
-
 #if(__ANDROID__ || BARE_METAL)
-/** Convert integer and float values to string.
- *
- * @note This function implements the same behaviour as std::to_string. The
- *       latter is missing in some Android toolchains.
- *
- * @param[in] value Value to be converted to string.
- *
- * @return String representation of @p value.
- */
-template <typename T, typename std::enable_if<std::is_arithmetic<typename std::decay<T>::type>::value, int>::type = 0>
-inline std::string to_string(T && value)
-{
-    std::stringstream stream;
-    stream << std::forward<T>(value);
-    return stream.str();
-}
-
-/** Rounds the floating-point argument arg to an integer value in floating-point format, using the current rounding mode.
- *
- * @note This function acts as a convenience wrapper around std::nearbyint. The
- *       latter is missing in some Android toolchains.
- *
- * @param[in] value Value to be rounded.
- *
- * @return The rounded value.
- */
 template <typename T>
 inline T nearbyint(T value)
 {
     return static_cast<T>(::nearbyint(value));
 }
 
-/** Convert string values to float.
- *
- * @note This function implements the same behaviour as std::stof. The latter
- *       is missing in some Android toolchains.
- *
- * @param[in] str String to be converted to float.
- *
- * @return Float representation of @p str.
- */
-inline float stof(const std::string &str)
-{
-    std::stringstream stream(str);
-    float             value = 0.f;
-    stream >> value;
-    return value;
-}
-
 /** Round floating-point value with half value rounding away from zero.
  *
  * @note This function implements the same behaviour as std::round except that it doesn't
@@ -260,21 +137,6 @@ inline int snprintf(char *s, size_t n, const char *fmt, Ts &&... args)
     return ::snprintf(s, n, fmt, std::forward<Ts>(args)...);
 }
 #else /* (__ANDROID__ || BARE_METAL) */
-/** Convert integer and float values to string.
- *
- * @note This function acts as a convenience wrapper around std::to_string. The
- *       latter is missing in some Android toolchains.
- *
- * @param[in] value Value to be converted to string.
- *
- * @return String representation of @p value.
- */
-template <typename T>
-inline std::string to_string(T &&value)
-{
-    return ::std::to_string(std::forward<T>(value));
-}
-
 /** Rounds the floating-point argument arg to an integer value in floating-point format, using the current rounding mode.
  *
  * @note This function acts as a convenience wrapper around std::nearbyint. The
@@ -290,21 +152,6 @@ inline T nearbyint(T value)
     return static_cast<T>(std::nearbyint(value));
 }
 
-/** Convert string values to float.
- *
- * @note This function acts as a convenience wrapper around std::stof. The
- *       latter is missing in some Android toolchains.
- *
- * @param[in] args Arguments forwarded to std::stof.
- *
- * @return Float representation of input string.
- */
-template <typename... Ts>
-int stof(Ts &&... args)
-{
-    return ::std::stof(std::forward<Ts>(args)...);
-}
-
 /** Round floating-point value with half value rounding away from zero.
  *
  * @note This function implements the same behaviour as std::round except that it doesn't
@@ -391,29 +238,6 @@ inline int snprintf(char *s, std::size_t n, const char *fmt, Ts &&... args)
 }
 #endif /* (__ANDROID__ || BARE_METAL) */
 
-inline std::string to_string(bool value)
-{
-    std::stringstream str;
-    str << std::boolalpha << value;
-    return str.str();
-}
-
-// std::align is missing in GCC 4.9
-// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57350
-inline void *align(std::size_t alignment, std::size_t size, void *&ptr, std::size_t &space)
-{
-    std::uintptr_t pn      = reinterpret_cast<std::uintptr_t>(ptr);
-    std::uintptr_t aligned = (pn + alignment - 1) & -alignment;
-    std::size_t    padding = aligned - pn;
-    if(space < size + padding)
-    {
-        return nullptr;
-    }
-
-    space -= padding;
-
-    return ptr = reinterpret_cast<void *>(aligned);
-}
 // std::numeric_limits<T>::lowest
 template <typename T>
 inline T lowest()
@@ -452,67 +276,6 @@ inline bool isfinite(bfloat16 value)
     return std::isfinite(float(value));
 }
 } // namespace cpp11
-
-namespace cpp14
-{
-/** make_unique is missing in CPP11. Re-implement it according to the standard proposal. */
-
-/**<Template for single object */
-template <class T>
-struct _Unique_if
-{
-    typedef std::unique_ptr<T> _Single_object; /**< Single object type */
-};
-
-/** Template for array */
-template <class T>
-struct _Unique_if<T[]>
-{
-    typedef std::unique_ptr<T[]> _Unknown_bound; /**< Array type */
-};
-
-/** Template for array with known bounds (to throw an error).
- *
- * @note this is intended to never be hit.
- */
-template <class T, size_t N>
-struct _Unique_if<T[N]>
-{
-    typedef void _Known_bound; /**< Should never be used */
-};
-
-/** Construct a single object and return a unique pointer to it.
- *
- * @param[in] args Constructor arguments.
- *
- * @return a unique pointer to the new object.
- */
-template <class T, class... Args>
-typename _Unique_if<T>::_Single_object
-make_unique(Args &&... args)
-{
-    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
-}
-
-/** Construct an array of objects and return a unique pointer to it.
- *
- * @param[in] n Array size
- *
- * @return a unique pointer to the new array.
- */
-template <class T>
-typename _Unique_if<T>::_Unknown_bound
-make_unique(size_t n)
-{
-    typedef typename std::remove_extent<T>::type U;
-    return std::unique_ptr<T>(new U[n]());
-}
-
-/** It is invalid to attempt to make_unique an array with known bounds. */
-template <class T, class... Args>
-typename _Unique_if<T>::_Known_bound
-make_unique(Args &&...) = delete;
-} // namespace cpp14
 } // namespace support
 } // namespace arm_compute
-#endif /* ARM_COMPUTE_TEST_TOOLCHAINSUPPORT */
+#endif /* ARM_COMPUTE_SUPPORT_TOOLCHAINSUPPORT */