Roll DirectX Shader Compiler from 02e491eb0197 to 58539905da4f (3 revisions)

https://chromium.googlesource.com/external/github.com/microsoft/DirectXShaderCompiler.git/+log/02e491eb0197..58539905da4f

2026-06-30 cbieneman@microsoft.com [DxilSimplify] Constant-fold VectorReduce.* (#8577)
2026-06-30 cbieneman@microsoft.com [Validation] Drill through chained GEPs for TGSM (#8575)
2026-06-30 cbieneman@microsoft.com [HLSL] Preserve coherence qualifiers on resource flat-conversions (#8583)

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 dneto@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: dneto@google.com
Change-Id: Ie095be0995c0c07b8332c29e44f556cafbccead8
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/321095
Bot-Commit: dawn-autoroll@skia-public.iam.gserviceaccount.com <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: dawn-autoroll@skia-public.iam.gserviceaccount.com <dawn-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index c258f80..44c3940 100644
--- a/DEPS
+++ b/DEPS
@@ -388,7 +388,7 @@
   },
 
   'third_party/directx-shader-compiler/src': {
-    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@02e491eb019766b866bcf09c427365713353841b',
+    'url': '{chromium_git}/external/github.com/microsoft/DirectXShaderCompiler@58539905da4f21b9c120b9d1946ee43840e0ac72',
   },
 
   'third_party/directx-headers/src': {
diff --git a/third_party/directx-shader-compiler/README.chromium b/third_party/directx-shader-compiler/README.chromium
index 6bedaf9..8d0c5da 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: 02e491eb019766b866bcf09c427365713353841b
+Revision: 58539905da4f21b9c120b9d1946ee43840e0ac72
 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 02e491e..5853990 160000
--- a/third_party/directx-shader-compiler/src
+++ b/third_party/directx-shader-compiler/src
@@ -1 +1 @@
-Subproject commit 02e491eb019766b866bcf09c427365713353841b
+Subproject commit 58539905da4f21b9c120b9d1946ee43840e0ac72