[llvm] [llvm-dlltool] Handle MIPS architecture (PR #114621)

[Hervé Poussineau via llvm-commits]

https://github.com/hpoussin updated https://github.com/llvm/llvm-project/pull/114621

>From 39c4e2d85e535587affd163c23aa318f294d51b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herv=C3=A9=20Poussineau?= <hpoussin at reactos.org>
Date: Sun, 22 Oct 2023 17:10:19 +0200
Subject: [PATCH] [llvm-dlltool] Handle MIPS architecture

---
 llvm/lib/Object/COFFImportFile.cpp                  | 2 ++
 llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp | 3 ++-
 llvm/test/tools/llvm-dlltool/machine-opt.def        | 3 +++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Object/COFFImportFile.cpp b/llvm/lib/Object/COFFImportFile.cpp
index ff3dcf9e13ffaf..595533ff947252 100644
--- a/llvm/lib/Object/COFFImportFile.cpp
+++ b/llvm/lib/Object/COFFImportFile.cpp
@@ -133,6 +133,8 @@ static uint16_t getImgRelRelocation(MachineTypes Machine) {
     return IMAGE_REL_ARM64_ADDR32NB;
   case IMAGE_FILE_MACHINE_I386:
     return IMAGE_REL_I386_DIR32NB;
+  case IMAGE_FILE_MACHINE_R4000:
+    return IMAGE_REL_MIPS_REFWORDNB;
   }
 }
 
diff --git a/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp b/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
index 58ff720516f384..fdd6f3ec4be54b 100644
--- a/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
+++ b/llvm/lib/ToolDrivers/llvm-dlltool/DlltoolDriver.cpp
@@ -79,6 +79,7 @@ MachineTypes getEmulation(StringRef S) {
       .Case("arm", IMAGE_FILE_MACHINE_ARMNT)
       .Case("arm64", IMAGE_FILE_MACHINE_ARM64)
       .Case("arm64ec", IMAGE_FILE_MACHINE_ARM64EC)
+      .Case("mips", IMAGE_FILE_MACHINE_R4000)
       .Default(IMAGE_FILE_MACHINE_UNKNOWN);
 }
 
@@ -173,7 +174,7 @@ int llvm::dlltoolDriverMain(llvm::ArrayRef<const char *> ArgsArr) {
       (!Args.hasArgNoClaim(OPT_d) && !Args.hasArgNoClaim(OPT_l))) {
     Table.printHelp(outs(), "llvm-dlltool [options] file...", "llvm-dlltool",
                     false);
-    llvm::outs() << "\nTARGETS: i386, i386:x86-64, arm, arm64, arm64ec\n";
+    llvm::outs() << "\nTARGETS: i386, i386:x86-64, arm, arm64, arm64ec, mips\n";
     return 1;
   }
 
diff --git a/llvm/test/tools/llvm-dlltool/machine-opt.def b/llvm/test/tools/llvm-dlltool/machine-opt.def
index 6dce8255a43db3..37eccec8831fc6 100644
--- a/llvm/test/tools/llvm-dlltool/machine-opt.def
+++ b/llvm/test/tools/llvm-dlltool/machine-opt.def
@@ -6,6 +6,8 @@
 ; RUN: llvm-readobj %t.a | FileCheck --check-prefix=ARM %s
 ; RUN: llvm-dlltool -m arm64 -d %s -l %t.a
 ; RUN: llvm-readobj %t.a | FileCheck --check-prefix=ARM64 %s
+; RUN: llvm-dlltool -m mips -d %s -l %t.a
+; RUN: llvm-readobj %t.a | FileCheck --check-prefix=MIPS %s
 
 LIBRARY test.dll
 EXPORTS
@@ -15,3 +17,4 @@ TestFunction
 ; X86_64: Format: COFF-x86-64
 ; ARM: Format: COFF-ARM{{$}}
 ; ARM64: Format: COFF-ARM64
+; MIPS: Format: COFF-MIPS