From 104050795090eab74c1f96fcf0be0e2a98056b73 Mon Sep 17 00:00:00 2001
From: hpoussin <32227662+hpoussin@users.noreply.github.com>
Date: Tue, 15 Oct 2024 04:49:17 +0200
Subject: [PATCH] [Triple] Make mipsel-*-windows-* use COFF files by default
 (#107809)

Windows NT/MIPS and Windows CE/MIPS always used COFF format.

This is an extract of PR #107744.
---
 llvm/lib/TargetParser/Triple.cpp           | 6 +++++-
 llvm/unittests/TargetParser/TripleTest.cpp | 4 ++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
index f07eb8fafc73737..b271f29d265cfe0 100644
--- a/llvm/lib/TargetParser/Triple.cpp
+++ b/llvm/lib/TargetParser/Triple.cpp
@@ -925,7 +925,6 @@ static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
   case Triple::mips64:
   case Triple::mips64el:
   case Triple::mips:
-  case Triple::mipsel:
   case Triple::msp430:
   case Triple::nvptx64:
   case Triple::nvptx:
@@ -950,6 +949,11 @@ static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
   case Triple::xtensa:
     return Triple::ELF;
 
+  case Triple::mipsel:
+    if (T.isOSWindows())
+      return Triple::COFF;
+    return Triple::ELF;
+
   case Triple::ppc64:
   case Triple::ppc:
     if (T.isOSAIX())
diff --git a/llvm/unittests/TargetParser/TripleTest.cpp b/llvm/unittests/TargetParser/TripleTest.cpp
index df40bb2292cc9e5..cb2fa95d431c66f 100644
--- a/llvm/unittests/TargetParser/TripleTest.cpp
+++ b/llvm/unittests/TargetParser/TripleTest.cpp
@@ -2468,6 +2468,10 @@ TEST(TripleTest, NormalizeWindows) {
             Triple::normalize("i686-pc-windows-elf-elf"));
 
   EXPECT_TRUE(Triple("x86_64-pc-win32").isWindowsMSVCEnvironment());
+
+  EXPECT_TRUE(Triple(Triple::normalize("mipsel-windows-msvccoff")).isOSBinFormatCOFF());
+  EXPECT_TRUE(Triple(Triple::normalize("mipsel-windows-msvc")).isOSBinFormatCOFF());
+  EXPECT_TRUE(Triple(Triple::normalize("mipsel-windows-gnu")).isOSBinFormatCOFF());
 }
 
 TEST(TripleTest, NormalizeAndroid) {