llvmbot wrote:

<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang-driver

Author: Prabhu Rajasekaran (Prabhuk)

<details>
<summary>Changes</summary>

Set MS ABI as default ABI for UEFI.


---
Full diff: https://github.com/llvm/llvm-project/pull/138364.diff


1 Files Affected:

- (modified) clang/lib/Driver/ToolChains/Arch/X86.cpp (+1-1) 


``````````diff
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();

``````````

</details>


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