Integrate LLVM at llvm/llvm-project@1f06398e96d4

Updates LLVM usage to match
[1f06398e96d4](https://github.com/llvm/llvm-project/commit/1f06398e96d4)

PiperOrigin-RevId: 451070355
diff --git a/tensorflow/compiler/mlir/hlo/lib/Dialect/gml_st/transforms/bufferizable_op_interface_impl.cpp b/tensorflow/compiler/mlir/hlo/lib/Dialect/gml_st/transforms/bufferizable_op_interface_impl.cpp
index 56ae6ac..e6e93cf 100644
--- a/tensorflow/compiler/mlir/hlo/lib/Dialect/gml_st/transforms/bufferizable_op_interface_impl.cpp
+++ b/tensorflow/compiler/mlir/hlo/lib/Dialect/gml_st/transforms/bufferizable_op_interface_impl.cpp
@@ -80,8 +80,6 @@
     return true;
   }
 
-  bool isAllocationHoistingBarrier(Operation *op) const { return true; }
-
   LogicalResult bufferize(Operation *op, RewriterBase &rewriter,
                           BufferizationState &state) const {
     auto loop_op = cast<LoopOp>(op);
diff --git a/third_party/llvm/workspace.bzl b/third_party/llvm/workspace.bzl
index 336ee12..772b332 100644
--- a/third_party/llvm/workspace.bzl
+++ b/third_party/llvm/workspace.bzl
@@ -4,8 +4,8 @@
 
 def repo(name):
     """Imports LLVM."""
-    LLVM_COMMIT = "6edbdf80cac119f8f30d2ae6fa2972d9e778510b"
-    LLVM_SHA256 = "dd7ca82116dbfc1ddd7159425965318dfbe7a39e5f150a19880f7f40c6118001"
+    LLVM_COMMIT = "1f06398e96d4508d22f42b760f70eb5d4e7b1dc9"
+    LLVM_SHA256 = "84bd02a75966a1af45bf4556484817f9c4621a045686f7d1f32b034dc1c784c0"
 
     tf_http_archive(
         name = name,