Roll DirectX Shader Compiler from 63264ca42672 to bb422093cd68 (3 revisions)

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/63264ca42672..bb422093cd68

2026-07-22 jackell@microsoft.com [HLSL] Add rectangular LinAlg MatVec coverage (#8643)
2026-07-21 jackell@microsoft.com [HLSL] Add non-square LinAlg CopyConvert coverage (#8620)
2026-07-21 ascoleman@microsoft.com [SM6.10] LinAlg Validation: MatrixAccumulate (#8627)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/directx-shader-compiler-dawn
Please CC chouinard@google.com,webgpu-developers@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in DirectX Shader Compiler: https://github.com/microsoft/DirectXShaderCompiler/issues/new/choose
To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

Bug: None
Tbr: chouinard@google.com
Change-Id: I0c60b8e8394af4030d7210b2a9ebe8f797e1b132
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/326435
Commit-Queue: dawn-autoroll@skia-public.iam.gserviceaccount.com <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: dawn-autoroll@skia-public.iam.gserviceaccount.com <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 883609c..cb034e4 100644
--- a/DEPS
+++ b/DEPS
@@ -413,7 +413,7 @@
   },
 
   'third_party/directx-shader-compiler/src': {
-    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@63264ca4267253dd6c0401ee967d2363e35af794',
+    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@bb422093cd68446e4360f4524ca5a42119805325',
   },
 
   'third_party/directx-headers/src': {
diff --git a/third_party/directx-shader-compiler/README.chromium b/third_party/directx-shader-compiler/README.chromium
index be2551c..d0fb15d 100644
--- a/third_party/directx-shader-compiler/README.chromium
+++ b/third_party/directx-shader-compiler/README.chromium
@@ -4,7 +4,7 @@
 Update Mechanism: Autoroll
 Security Critical: yes
 Version: N/A
-Revision: 63264ca4267253dd6c0401ee967d2363e35af794
+Revision: bb422093cd68446e4360f4524ca5a42119805325
 License: bcrypt-solar-designer, bsd-3-clause, gpl-2.0-with-autoconf-exception, isc, mit, ncsa, spencer-86, unicode_org, unlicense
 License File: LICENSE
 Shipped: yes
diff --git a/third_party/directx-shader-compiler/src b/third_party/directx-shader-compiler/src
index 63264ca..bb42209 160000
--- a/third_party/directx-shader-compiler/src
+++ b/third_party/directx-shader-compiler/src
@@ -1 +1 @@
-Subproject commit 63264ca4267253dd6c0401ee967d2363e35af794
+Subproject commit bb422093cd68446e4360f4524ca5a42119805325