Concrete SIMD.init(repeating:) and SIMD.init(lowHalf:highHalf:) optimizations (#81766)

WIP to add more overloads to optimize SIMD codegen on concrete types.
Here we do:

- init(repeating:)
- init(lowHalf:highHalf:)

These are always inlined, even in debug, since LLVM knows how to lower
them to one or two instructions on the targets that we care about.

Author: stephentyrone

Runtimes/Core/core/CMakeLists.txt

@@ -264,16 +264,24 @@ if(SwiftCore_ENABLE_COMMANDLINE_SUPPORT)
 endif()
 
 if(SwiftCore_ENABLE_VECTOR_TYPES)
-  gyb_expand(SIMDConcreteOperations.swift.gyb
-    SIMDConcreteOperations.swift
+  gyb_expand(SIMDFloatConcreteOperations.swift.gyb
+    SIMDFloatConcreteOperations.swift
+    FLAGS "-DCMAKE_SIZEOF_VOID_P=${SwiftCore_SIZEOF_POINTER}")
+  gyb_expand(SIMDIntegerConcreteOperations.swift.gyb
+    SIMDIntegerConcreteOperations.swift
+    FLAGS "-DCMAKE_SIZEOF_VOID_P=${SwiftCore_SIZEOF_POINTER}")
+  gyb_expand(SIMDMaskConcreteOperations.swift.gyb
+    SIMDMaskConcreteOperations.swift
     FLAGS "-DCMAKE_SIZEOF_VOID_P=${SwiftCore_SIZEOF_POINTER}")
   gyb_expand(SIMDVectorTypes.swift.gyb
     SIMDVectorTypes.swift
     FLAGS "-DCMAKE_SIZEOF_VOID_P=${SwiftCore_SIZEOF_POINTER}")
 
   target_sources(swiftCore PRIVATE
     SIMDVector.swift
-    "${CMAKE_CURRENT_BINARY_DIR}/SIMDConcreteOperations.swift"
+    "${CMAKE_CURRENT_BINARY_DIR}/SIMDFloatConcreteOperations.swift"
+    "${CMAKE_CURRENT_BINARY_DIR}/SIMDIntegerConcreteOperations.swift"
+    "${CMAKE_CURRENT_BINARY_DIR}/SIMDMaskConcreteOperations.swift"
     "${CMAKE_CURRENT_BINARY_DIR}/SIMDVectorTypes.swift")
 endif()
 

stdlib/public/core/CMakeLists.txt

@@ -268,11 +268,21 @@ split_embedded_sources(
   )
 
 if(SWIFT_STDLIB_ENABLE_VECTOR_TYPES)
+  split_embedded_sources(
+    OUT_LIST_EMBEDDED SWIFTLIB_EMBEDDED_VECTOR_GYB_SOURCES
+    OUT_LIST_NORMAL SWIFTLIB_VECTOR_GYB_SOURCES
+    
+    EMBEDDED SIMDIntegerConcreteOperations.swift.gyb
+    EMBEDDED SIMDFloatConcreteOperations.swift.gyb
+    EMBEDDED SIMDMaskConcreteOperations.swift.gyb
+    EMBEDDED SIMDVectorTypes.swift.gyb
+  )
+
   list(APPEND SWIFTLIB_SOURCES SIMDVector.swift)
-  list(APPEND SWIFTLIB_GYB_SOURCES SIMDConcreteOperations.swift.gyb SIMDVectorTypes.swift.gyb)
+  list(APPEND SWIFTLIB_GYB_SOURCES ${SWIFTLIB_VECTOR_GYB_SOURCES})
 
   list(APPEND SWIFTLIB_EMBEDDED_SOURCES SIMDVector.swift)
-  list(APPEND SWIFTLIB_EMBEDDED_GYB_SOURCES SIMDConcreteOperations.swift.gyb SIMDVectorTypes.swift.gyb)
+  list(APPEND SWIFTLIB_EMBEDDED_GYB_SOURCES ${SWIFTLIB_EMBEDDED_VECTOR_GYB_SOURCES})
 endif()
 
 # Freestanding and Linux/Android builds both have failures to resolve.

stdlib/public/core/GroupInfo.json

@@ -182,9 +182,12 @@
       "FloatingPointTypes.swift",
       "FloatingPointRandom.swift"],
     "Vector": [
-      "SIMDConcreteOperations.swift",
+      "SIMDIntegerConcreteOperations.swift",
+      "SIMDFloatConcreteOperations.swift",
+      "SIMDMaskConcreteOperations.swift",
       "SIMDVector.swift",
-      "SIMDVectorTypes.swift"]}
+      "SIMDVectorTypes.swift"
+    ]}
   ],
   "Optional": [
     "Optional.swift"