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AK+Everywhere: Add AK_COMPILER_{GCC,CLANG} and use them most places

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Doesn't use them in libc headers so that those don't have to pull in
AK/Platform.h.

AK_COMPILER_GCC is set _only_ for gcc, not for clang too. (__GNUC__ is
defined in clang builds as well.) Using AK_COMPILER_GCC simplifies
things some.

AK_COMPILER_CLANG isn't as much of a win, other than that it's
consistent with AK_COMPILER_GCC.
This commit is contained in:
Nico Weber 2022-10-04 15:04:13 -04:00 • committed by Linus Groh
parent ff4b912b7c
commit 2af028132a
35 changed files with 64 additions and 49 deletions
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8
AK/BuiltinWrappers.h
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@ -11,7 +11,7 @@
template<Unsigned IntType>
inline constexpr int popcount(IntType value)
{
#if defined(__GNUC__) || defined(__clang__)
#if defined(AK_COMPILER_CLANG) || defined(AK_COMPILER_GCC)
static_assert(sizeof(IntType) <= sizeof(unsigned long long));
if constexpr (sizeof(IntType) <= sizeof(unsigned int))
return __builtin_popcount(value);
@ -39,7 +39,7 @@ inline constexpr int popcount(IntType value)
template<Unsigned IntType>
inline constexpr int count_trailing_zeroes(IntType value)
{
#if defined(__GNUC__) || defined(__clang__)
#if defined(AK_COMPILER_CLANG) || defined(AK_COMPILER_GCC)
static_assert(sizeof(IntType) <= sizeof(unsigned long long));
if constexpr (sizeof(IntType) <= sizeof(unsigned int))
return __builtin_ctz(value);
@ -77,7 +77,7 @@ inline constexpr int count_trailing_zeroes_safe(IntType value)
template<Unsigned IntType>
inline constexpr int count_leading_zeroes(IntType value)
{
#if defined(__GNUC__) || defined(__clang__)
#if defined(AK_COMPILER_CLANG) || defined(AK_COMPILER_GCC)
static_assert(sizeof(IntType) <= sizeof(unsigned long long));
if constexpr (sizeof(IntType) <= sizeof(unsigned int))
return __builtin_clz(value) - (32 - (8 * sizeof(IntType)));
@ -114,7 +114,7 @@ inline constexpr int count_leading_zeroes_safe(IntType value)
template<Integral IntType>
inline constexpr int bit_scan_forward(IntType value)
{
#if defined(__GNUC__) || defined(__clang__)
#if defined(AK_COMPILER_CLANG) || defined(AK_COMPILER_GCC)
static_assert(sizeof(IntType) <= sizeof(unsigned long long));
if constexpr (sizeof(IntType) <= sizeof(unsigned int))
return __builtin_ffs(value);