[lld] [LLD][COFF] Use primary symbol table machine in Writer::writeHeader (NFC) (PR #128442)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-lld-coff

Author: Jacek Caban (cjacek)

<details>
<summary>Changes</summary>

Instead of duplicating the logic from `LinkerDriver::setMachine`.

---
Full diff: https://github.com/llvm/llvm-project/pull/128442.diff


1 Files Affected:

- (modified) lld/COFF/Writer.cpp (+1-10) 


``````````diff
diff --git a/lld/COFF/Writer.cpp b/lld/COFF/Writer.cpp
index 58727c1615769..3efbcdb452ebe 100644
--- a/lld/COFF/Writer.cpp
+++ b/lld/COFF/Writer.cpp
@@ -1758,16 +1758,7 @@ template <typename PEHeaderTy> void Writer::writeHeader() {
   assert(coffHeaderOffset == buf - buffer->getBufferStart());
   auto *coff = reinterpret_cast<coff_file_header *>(buf);
   buf += sizeof(*coff);
-  switch (config->machine) {
-  case ARM64EC:
-    coff->Machine = AMD64;
-    break;
-  case ARM64X:
-    coff->Machine = ARM64;
-    break;
-  default:
-    coff->Machine = config->machine;
-  }
+  coff->Machine = ctx.symtab.isEC() ? AMD64 : ctx.symtab.machine;
   coff->NumberOfSections = ctx.outputSections.size();
   coff->Characteristics = IMAGE_FILE_EXECUTABLE_IMAGE;
   if (config->largeAddressAware)

``````````

</details>


https://github.com/llvm/llvm-project/pull/128442