From bbfffd064b551cfa067fd85346be3104d5cffc93 Mon Sep 17 00:00:00 2001
From: Patrick Quist <partouf@gmail.com>
Date: Thu, 4 Jun 2026 16:04:00 +0200
Subject: [PATCH] Add FXC (D3DCompiler) compilers to HLSL (#8781)

---
 etc/config/hlsl.amazonwin.properties | 16 ++++++++-
 lib/compilers/_all.ts                |  1 +
 lib/compilers/fxc.ts                 | 52 ++++++++++++++++++++++++++++
 3 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 lib/compilers/fxc.ts

diff --git a/etc/config/hlsl.amazonwin.properties b/etc/config/hlsl.amazonwin.properties
index d9cc4de24..d105fd706 100644
--- a/etc/config/hlsl.amazonwin.properties
+++ b/etc/config/hlsl.amazonwin.properties
@@ -1,4 +1,18 @@
-compilers=&amd_rga
+compilers=&fxc:&amd_rga
+
+group.fxc.compilers=fxc_10_0_19041:fxc_10_0_26100
+group.fxc.groupName=FXC (D3DCompiler)
+group.fxc.isSemVer=true
+group.fxc.baseName=FXC
+group.fxc.compilerType=fxc
+
+compiler.fxc_10_0_19041.exe=Z:/compilers/fxc/10.0.19041/x64/fxc.exe
+compiler.fxc_10_0_19041.semver=10.0.19041.5609
+compiler.fxc_10_0_19041.name=FXC 10.0.19041.5609
+
+compiler.fxc_10_0_26100.exe=Z:/compilers/fxc/10.0.26100/x64/fxc.exe
+compiler.fxc_10_0_26100.semver=10.0.26100.8249
+compiler.fxc_10_0_26100.name=FXC 10.0.26100.8249
 
 group.amd_rga.compilers=rga_2_9_1:rga_2_10:rga_2_11:rga_2_12:rga_2_13
 group.amd_rga.groupName=AMD Radeon GPU Analyzer
diff --git a/lib/compilers/_all.ts b/lib/compilers/_all.ts
index 0a15973a6..9c29baa50 100644
--- a/lib/compilers/_all.ts
+++ b/lib/compilers/_all.ts
@@ -84,6 +84,7 @@ export {FakeCompiler} from './fake-for-test.js';
 export {FlangCompiler} from './flang.js';
 export {FlangFC1Compiler} from './flang-fc1.js';
 export {FortranCompiler} from './fortran.js';
+export {FXCCompiler} from './fxc.js';
 export {GA68Compiler} from './ga68.js';
 export {GCCCompiler} from './gcc.js';
 export {GCCCobolCompiler} from './gcccobol.js';
diff --git a/lib/compilers/fxc.ts b/lib/compilers/fxc.ts
new file mode 100644
index 000000000..ff5ad9a82
--- /dev/null
+++ b/lib/compilers/fxc.ts
@@ -0,0 +1,52 @@
+// Copyright (c) 2026, Compiler Explorer Authors
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright
+//       notice, this list of conditions and the following disclaimer in the
+//       documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+import type {ParseFiltersAndOutputOptions} from '../../types/features/filters.interfaces.js';
+import {BaseCompiler} from '../base-compiler.js';
+
+// FXC is Microsoft's legacy Direct3D (D3DCompiler) HLSL shader compiler. It produces DX bytecode
+// rather than DXIL, and does not understand DXC-specific flags such as -Qembed_debug, so it cannot
+// share HLSLCompiler's optionsForFilter.
+export class FXCCompiler extends BaseCompiler {
+    static get key() {
+        return 'fxc';
+    }
+
+    constructor(info: any, env: any) {
+        super(info, env);
+
+        this.compiler.supportsIntel = false;
+    }
+
+    override optionsForFilter(
+        filters: ParseFiltersAndOutputOptions,
+        outputFilename: string,
+        userOptions?: string[],
+    ): string[] {
+        return [
+            '-Zi', // Embed debug information so the assembly listing carries source associations
+            `-Fc${outputFilename}`, // Output the human-readable assembly listing
+        ];
+    }
+}