[clang] [CIR] Upstream ClearCacheOp support for __builtin___clear_cache (PR #178260)

[Andy Kaylor via cfe-commits]

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@@ -1713,6 +1713,19 @@ mlir::LogicalResult CIRToLLVMFrameAddrOpLowering::matchAndRewrite(
   return mlir::success();
 }
 
+mlir::LogicalResult CIRToLLVMClearCacheOpLowering::matchAndRewrite(
+    cir::ClearCacheOp op, OpAdaptor adaptor,
+    mlir::ConversionPatternRewriter &rewriter) const {
+  auto begin = adaptor.getBegin();
+  auto end = adaptor.getEnd();
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andykaylor wrote:

Don't use `auto` here.

https://github.com/llvm/llvm-project/pull/178260