[clang] [lld] [llvm] [clang][MIPS] Add support for mipsel-windows-* targets (PR #107744)

[Martin Storsjö via cfe-commits]

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@@ -1132,6 +1132,8 @@ StringRef COFFObjectFile::getFileFormatName() const {
     return "COFF-ARM64EC";
   case COFF::IMAGE_FILE_MACHINE_ARM64X:
     return "COFF-ARM64X";
+  case COFF::IMAGE_FILE_MACHINE_R4000:
+    return "COFF-R4000";
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mstorsjo wrote:

Hmm, do we want to label this as `COFF-R4000`, or would just `COFF-MIPS` be more easily accessible?

I see that there are a couple other `IMAGE_FILE_MACHINE_*` constants for MIPS variants - how relevant are they?

If the R4000 is the only one that actually is being used, I'd almost go with labelling this just `COFF-MIPS`.

https://github.com/llvm/llvm-project/pull/107744