Windows: enable the profiling library on Windows

The official builds include the profiling library, so we should enable
it on the CI to ensure that the path is tested.  This should only add
~1m to the total build time.

Author: compnerd

cmake/caches/Windows-x86_64.cmake

@@ -10,14 +10,35 @@ set(LLVM_EXTERNAL_PROJECTS
       swift
     CACHE STRING "")
 
+set(LLVM_ENABLE_RUNTIMES
+      compiler-rt
+    CACHE STRING "")
+
 # NOTE(compnerd) always enable assertions, the toolchain will not provide enough
 # context to resolve issues otherwise and may silently generate invalid output.
 set(LLVM_ENABLE_ASSERTIONS YES CACHE BOOL "")
 
 set(ENABLE_X86_RELAX_RELOCATIONS YES CACHE BOOL "")
 
 set(LLVM_APPEND_VC_REV NO CACHE BOOL "")
+set(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR YES CACHE BOOL "")
 set(LLVM_ENABLE_PYTHON YES CACHE BOOL "")
+set(LLVM_RUNTIME_TARGETS
+      x86_64-unknown-windows-msvc
+    CACHE STRING "")
+foreach(target ${LLVM_RUNTIME_TARGETS})
+  set(RUNTIMES_${target}_LLVM_ENABLE_RUNTIMES
+        compiler-rt
+      CACHE STRING "")
+  set(RUNTIMES_${target}_CMAKE_MT mt CACHE STRING "")
+  set(RUNTIMES_${target}_CMAKE_SYSTEM_NAME Windows CACHE STRING "")
+  set(RUNTIMES_${target}_CMAKE_BUILD_TYPE Release CACHE STRING "")
+  set(RUNTIMES_${target}_COMPILER_RT_BUILD_CRT NO CACHE BOOL "")
+  set(RUNTIMES_${target}_COMPILER_RT_BUILD_LIBFUZZER NO CACHE BOOL "")
+  set(RUNTIMES_${target}_COMPILER_RT_BUILD_PROFILE YES CACHE BOOL "")
+  set(RUNTIMES_${target}_COMPILER_RT_BUILD_SANITIZERS NO CACHE BOOL "")
+  set(RUNTIMES_${target}_COMPILER_RT_BUILD_XRAY NO CACHE BOOL "")
+endforeach()
 set(LLVM_TARGETS_TO_BUILD AArch64 ARM WebAssembly X86 CACHE STRING "")
 
 # Disable certain targets to reduce the configure time or to avoid configuration
@@ -129,6 +150,7 @@ set(LLVM_DISTRIBUTION_COMPONENTS
       libclang
       libclang-headers
       LTO
+      runtimes
       ${LLVM_TOOLCHAIN_TOOLS}
       ${CLANG_TOOLS}
       ${LLD_TOOLS}