[clang] [clang] UEFI default ABI (PR #138364)

[Prabhu Rajasekaran via cfe-commits]

https://github.com/Prabhuk created https://github.com/llvm/llvm-project/pull/138364

Set MS ABI as default ABI for UEFI.


>From d0786948b07adb0318a19562c9a9ee72e893feef Mon Sep 17 00:00:00 2001
From: prabhukr <prabhukr at google.com>
Date: Fri, 2 May 2025 23:38:40 +0000
Subject: [PATCH] [clang] UEFI default ABI

Set MS ABI as default ABI for UEFI.
---
 clang/lib/Driver/ToolChains/Arch/X86.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/clang/lib/Driver/ToolChains/Arch/X86.cpp b/clang/lib/Driver/ToolChains/Arch/X86.cpp
index e6ac3a9e4b350..eea0c9e2ae6e0 100644
--- a/clang/lib/Driver/ToolChains/Arch/X86.cpp
+++ b/clang/lib/Driver/ToolChains/Arch/X86.cpp
@@ -122,7 +122,7 @@ void x86::getX86TargetFeatures(const Driver &D, const llvm::Triple &Triple,
   // Claim and report unsupported -mabi=. Note: we don't support "sysv_abi" or
   // "ms_abi" as default function attributes.
   if (const Arg *A = Args.getLastArg(clang::driver::options::OPT_mabi_EQ)) {
-    StringRef DefaultAbi = Triple.isOSWindows() ? "ms" : "sysv";
+    StringRef DefaultAbi = Triple.isOSWindowsOrUEFI() ? "ms" : "sysv";
     if (A->getValue() != DefaultAbi)
       D.Diag(diag::err_drv_unsupported_opt_for_target)
           << A->getSpelling() << Triple.getTriple();