[llvm] [CMake][Support] Suppress ml64 assembler logo printing when compiling BLAKE3 on Windows (PR #106794)

[Matt Bolitho via llvm-commits]

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@@ -28,12 +28,18 @@ if (CAN_USE_ASSEMBLER)
     check_symbol_exists(_M_X64 "" IS_X64)
     if (IS_X64)
       enable_language(ASM_MASM)
-      list(APPEND LLVM_BLAKE3_FILES
+      set(LLVM_BLAKE3_ASM_FILES
         blake3_sse2_x86-64_windows_msvc.asm
         blake3_sse41_x86-64_windows_msvc.asm
         blake3_avx2_x86-64_windows_msvc.asm
         blake3_avx512_x86-64_windows_msvc.asm
       )
+      list(APPEND LLVM_BLAKE3_FILES ${LLVM_BLAKE3_ASM_FILES})
+      # Supress the copyright message and 'Assembling...' message.
+      foreach(LLVM_BLAKE3_ASM_FILE ${LLVM_BLAKE3_ASM_FILES})
+        set_source_files_properties(${LLVM_BLAKE3_ASM_FILE}
+          PROPERTIES COMPILE_OPTIONS "/quiet;/nologo")
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MattBolitho wrote:

Thanks for the explanation. Even with just `/nologo` the improvement is much better imo.

I don't think the generic `check_compiler_flag` function supports `ASM_MASM` so the logic _might_ get a bit involved for a small win (unless there are other places that would benefit). I am happy to use only `/nologo` based on that.

https://github.com/llvm/llvm-project/pull/106794