Create landing page for XLA

Moving to top-level directory

PiperOrigin-RevId: 219395797

tensorflow/compiler/xla/README.md

@@ -1,7 +1,6 @@
 <p align="center">
-  <img width="200" src="xlalogo.png"/>
+  <img width="200" src="./g3doc/images/xlalogo.png"/>
 </p>
 
 XLA (Accelerated Linear Algebra) is a domain-specific compiler for linear
-algebra that optimizes TensorFlow computations. See the
-[documentation](https://www.tensorflow.org/performance/xla/) for more details.
+algebra that optimizes TensorFlow computations. See the [documentation](./g3doc/overview.md).

tensorflow/compiler/xla/g3doc/README.md

@@ -1,3 +1,3 @@
 # XLA: Accelerated Linear Algebra
 
-These are the docs for: https://www.tensorflow.org/extend/xla
+These are the docs for: https://www.tensorflow.org/xla

tensorflow/compiler/xla/g3doc/_book.yaml

@@ -0,0 +1,29 @@
+upper_tabs:
+# Tabs left of dropdown menu
+- include: /_upper_tabs_left.yaml
+- include: /versions/_upper_tabs_versions.yaml
+# Dropdown menu
+- name: Ecosystem
+  path: /ecosystem
+  is_default: true
+  menu:
+  - include: /ecosystem/_menu_toc.yaml
+  lower_tabs:
+    # Subsite tabs
+    other:
+    - name: Guide
+      contents:
+      - title: XLA overview
+        path: /xla/overview
+      - title: Broadcasting semantics
+        path: /xla/broadcasting
+      - title: Developing a new backend for XLA
+        path: /xla/developing_new_backend
+      - title: Using JIT compilation
+        path: /xla/jit
+      - title: Operation semantics
+        path: /xla/operation_semantics
+      - title: Shapes and layout
+        path: /xla/shapes
+      - title: Using AOT compilation
+        path: /xla/tfcompile

tensorflow/compiler/xla/g3doc/_index.yaml

@@ -0,0 +1,35 @@
+book_path: /xla/_book.yaml
+project_path: /xla/_project.yaml
+description: <!--no description-->
+landing_page:
+  custom_css_path: /site-assets/css/style.css
+  rows:
+  - heading: XLA is a compiler that optimizes TensorFlow computations.
+    items:
+    - classname: devsite-landing-row-50
+      description: >
+        XLA (Accelerated Linear Algebra) is a domain-specific compiler for linear
+        algebra that optimizes TensorFlow computations. The results are
+        improvements in speed, memory usage, and portability on server and mobile
+        platforms. The XLA framework is experimental and in active development.
+        For details, read the <a href="./overview">XLA guide</a>.
+
+  - classname: devsite-landing-row-cards
+    items:
+    - heading: XLA - TensorFlow, compiled
+      image_path: /ecosystem/images/tf-logo-card-16x9.png
+      path: https://developers.googleblog.com/2017/03/xla-tensorflow-compiled.html
+      buttons:
+      - label: Read on Google Developers blog
+        path: https://developers.googleblog.com/2017/03/xla-tensorflow-compiled.html
+    - heading: XLA at the Dev Summit
+      youtube_id: kAOanJczHA0
+      buttons:
+      - label: Watch the video
+        path: https://www.youtube.com/watch?v=kAOanJczHA0
+    - heading: XLA on GitHub
+      image_path: /ecosystem/images/github-card-16x9.png
+      path: https://github.com/tensorflow/tensorflow/tree/master/tensorflow/compiler/xla
+      buttons:
+      - label: View on GitHub
+        path: https://github.com/tensorflow/tensorflow/tree/master/tensorflow/compiler/xla

tensorflow/compiler/xla/g3doc/_project.yaml

@@ -1,6 +1,6 @@
 name: XLA
 breadcrumb_name: XLA
-home_url: /extend/xla
+home_url: /xla/
 parent_project_metadata_path: /_project.yaml
 description: >
   XLA is a compiler-based linear algebra execution engine.

tensorflow/compiler/xla/g3doc/_toc.yaml

@@ -1,16 +0,0 @@
-toc:
-- heading: XLA
-- title: XLA overview
-  path: /extend/xla/
-- title: Broadcasting semantics
-  path: /extend/xla/broadcasting
-- title: Developing a new backend for XLA
-  path: /extend/xla/developing_new_backend
-- title: Using JIT compilation
-  path: /extend/xla/jit
-- title: Operation semantics
-  path: /extend/xla/operation_semantics
-- title: Shapes and layout
-  path: /extend/xla/shapes
-- title: Using AOT compilation
-  path: /extend/xla/tfcompile