[clang] [llvm] [RISCV] Add Zilsd and Zclsd Extensions (PR #131094)

[Sam Elliott via llvm-commits]

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@@ -780,6 +780,14 @@ Error RISCVISAInfo::checkDependency() {
       return getIncompatibleError("xwchc", "zcb");
   }
 
+  if (Exts.count("zclsd") != 0) {
+    if (XLen != 32)
+      return getError("'zclsd' is only supported for 'rv32'");
+
+    if (Exts.count("zcf") != 0)
+      return getIncompatibleError("zclsd", "zcf");
+  }
+
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lenary wrote:

This code is not tested. There should be tests in RISCVISAInfoTest.cpp `TEST(ParseArchString, RejectsConflictingExtensions)`

https://github.com/llvm/llvm-project/pull/131094