[llvm] [DirectX] Add DXIL_MODULE_FLAG for ShaderFlags. (PR #83217)

[Chris B via llvm-commits]

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@@ -0,0 +1,76 @@
+
+#ifdef DXIL_MODULE_FLAG
+
+// DXIL_MODULE_FLAG(bit offset for the flag, bit offset for feature flag (-1 for no feature flag), name, description.
+DXIL_MODULE_FLAG( 0, -1,  DisableOptimizations,   "D3D11_1_SB_GLOBAL_FLAG_SKIP_OPTIMIZATION")
+DXIL_MODULE_FLAG( 1, -1,  DisableMathRefactoring, "D3D10_SB_GLOBAL_FLAG_REFACTORING_ALLOWED")
+DXIL_MODULE_FLAG( 2,  0,  EnableDoublePrecision,  "Double-precision floating point")
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llvm-beanz wrote:

A bunch of these flags are duplicated in the DXContainerCosntants. Is there a reason we need to define them twice?

https://github.com/llvm/llvm-project/pull/83217