[libcxx-commits] [libcxx] [libc++] Optimize to_chars integral overloads (PR #210659)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions h -- libcxx/include/__charconv/to_chars_integral.h libcxx/test/support/charconv_test_helpers.h --diff_from_common_commit
``````````

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``````````diff
diff --git a/libcxx/include/__charconv/to_chars_integral.h b/libcxx/include/__charconv/to_chars_integral.h
index 25d2cfe82..4a7ba0fef 100644
--- a/libcxx/include/__charconv/to_chars_integral.h
+++ b/libcxx/include/__charconv/to_chars_integral.h
@@ -152,13 +152,13 @@ struct _LIBCPP_HIDDEN __integral<2> {
       __value <<= __shift;
 
       // Move the value into a vector and chop it up into its constituent bytes
-      auto __chopped    = __simd_vector<char, sizeof(_Tp)>(__simd_vector<_Tp, 1>(__value));
+      auto __chopped = __simd_vector<char, sizeof(_Tp)>(__simd_vector<_Tp, 1>(__value));
 
       // Duplicate values so we can extract the appropriate bits in multiple positions
       auto __characters = __itoa::__duplicate_vector_entries<8>(__chopped);
 
       // This is marked `always_inline` because it interacts with simd vectors
-      auto __shifts     = []<size_t... _Indices> [[__gnu__::__always_inline__]] (index_sequence<_Indices...>) {
+      auto __shifts = []<size_t... _Indices> [[__gnu__::__always_inline__]] (index_sequence<_Indices...>) {
         return __simd_vector<char, 8 * sizeof(_Tp)>{(7 - _Indices % 8)...};
       }(make_index_sequence<8 * sizeof(_Tp)>());
 
@@ -254,13 +254,13 @@ struct _LIBCPP_HIDDEN __integral<16> {
       __value <<= __shift;
 
       // Move the value into a vector and chop it up into its constituent bytes
-      auto __chopped    = __simd_vector<char, sizeof(_Tp)>(__simd_vector<_Tp, 1>(__value));
+      auto __chopped = __simd_vector<char, sizeof(_Tp)>(__simd_vector<_Tp, 1>(__value));
 
       // Duplicate values so we can extract the appropriate bits in multiple positions
       auto __characters = __itoa::__duplicate_vector_entries<2>(__chopped);
 
       // This is marked `always_inline` because it interacts with simd vectors
-      auto __shifts     = []<size_t... _Indices> [[__gnu__::__always_inline__]] (index_sequence<_Indices...>) {
+      auto __shifts = []<size_t... _Indices> [[__gnu__::__always_inline__]] (index_sequence<_Indices...>) {
         return __simd_vector<char, 2 * sizeof(_Tp)>{(_Indices % 2 == 0 ? 4 : 0)...};
       }(make_index_sequence<2 * sizeof(_Tp)>());
 

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https://github.com/llvm/llvm-project/pull/210659