Author: Steven Perron
Date: 2025-04-29T09:28:29-04:00
New Revision: cc0cf7253967af4aa3dce2a5de186f766564747b

URL: 
https://github.com/llvm/llvm-project/commit/cc0cf7253967af4aa3dce2a5de186f766564747b
DIFF: 
https://github.com/llvm/llvm-project/commit/cc0cf7253967af4aa3dce2a5de186f766564747b.diff

LOG: [HLSL] Allow non `.hlsl` files as source files (#137378)

Changes the driver to assume input file with an unknown extension are
HLSL source files instead of object files.

Fixes https://github.com/llvm/llvm-project/issues/137370

Added: 
    clang/test/Driver/dxc_I.test

Modified: 
    clang/lib/Driver/Driver.cpp

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp
index 2b8c6e35263b1..a648cc928afdc 100644
--- a/clang/lib/Driver/Driver.cpp
+++ b/clang/lib/Driver/Driver.cpp
@@ -3001,6 +3001,8 @@ void Driver::BuildInputs(const ToolChain &TC, 
DerivedArgList &Args,
               Ty = types::TY_CXX;
             else if (CCCIsCPP() || CCGenDiagnostics)
               Ty = types::TY_C;
+            else if (IsDXCMode())
+              Ty = types::TY_HLSL;
             else
               Ty = types::TY_Object;
           }

diff  --git a/clang/test/Driver/dxc_I.test b/clang/test/Driver/dxc_I.test
new file mode 100644
index 0000000000000..c78382375b2b1
--- /dev/null
+++ b/clang/test/Driver/dxc_I.test
@@ -0,0 +1,4 @@
+// RUN: %clang_dxc -Tlib_6_3  -### %s 2>&1 | FileCheck %s
+
+// Make sure a non `.hlsl` file is considered an HLSL source file in dxc mode.
+// CHECK: "-x" "hlsl" "{{.*}}dxc_I.test"


        
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