[clang] [llvm] [ARM] Add support for Windows SEH (PR #184953)

[Hans Wennborg via cfe-commits]

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@@ -1664,7 +1664,8 @@ class TargetInfo : public TransferrableTargetInfo,
   bool isSEHTrySupported() const {
     return getTriple().isOSWindows() &&
            (getTriple().isX86() ||
-            getTriple().getArch() == llvm::Triple::aarch64);
+            getTriple().getArch() == llvm::Triple::aarch64 ||
+            getTriple().isThumb());
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zmodem wrote:

Why only `isThumb()` and not `isArm()`?

https://github.com/llvm/llvm-project/pull/184953