[clang] [llvm] [RISCV][FMV] Support target_clones (PR #85786)

[Craig Topper via cfe-commits]

================
@@ -14156,6 +14157,84 @@ 
CodeGenFunction::EmitAArch64CpuSupports(ArrayRef<StringRef> FeaturesStrs) {
   return Result;
 }
 
+llvm::SmallVector<llvm::Value *>
+CodeGenFunction::EmitRISCVExtSupports(ArrayRef<StringRef> FeaturesStrs) {
+  auto BaseExtReqs = llvm::RISCV::getBaseExtensionKey(FeaturesStrs);
+  auto IMACompatibleExtReqs =
+      llvm::RISCV::getIMACompatibleExtensionKey(FeaturesStrs);
+
+  // check whether all FeatureStrs are available for hwprobe.
----------------
topperc wrote:

check->Check

https://github.com/llvm/llvm-project/pull/85786
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