[DXContainer] Update DXContainer to match D3D12 spec

[joaosaffran]

Update the descriptor range flag values in DXContainerConstants.def to match
the Direct3D12 specification. This changes two aspects:

1. Modify the DESCRIPTOR_RANGE_FLAG macro to use direct values instead of
   bit shifts
2. Update the flag values to use hex notation and match D3D12's
   D3D12_DESCRIPTOR_RANGE_FLAGS enumeration:
   • DESCRIPTORS_VOLATILE: 0x1
   • DATA_VOLATILE: 0x2
   • DATA_STATIC_WHILE_SET_AT_EXECUTE: 0x4
   • DATA_STATIC: 0x8
   • DESCRIPTORS_STATIC_KEEPING_BUFFER_BOUNDS_CHECKS: 0x10000
3. Removed NONE value from ROOT_DESCRIPTOR_FLAG

This ensures better compatibility with the D3D12 API and makes the values
more explicit in the code.

Requested here: #138315 (comment)

[llvmbot]

@llvm/pr-subscribers-backend-directx

@llvm/pr-subscribers-llvm-binary-utilities

Author: None (joaosaffran)

Changes

Update the descriptor range flag values in DXContainerConstants.def to match
the Direct3D12 specification. This changes two aspects:

1. Modify the DESCRIPTOR_RANGE_FLAG macro to use direct values instead of
   bit shifts
2. Update the flag values to use hex notation and match D3D12's
   D3D12_DESCRIPTOR_RANGE_FLAGS enumeration:
   • DESCRIPTORS_VOLATILE: 0x1
   • DATA_VOLATILE: 0x2
   • DATA_STATIC_WHILE_SET_AT_EXECUTE: 0x4
   • DATA_STATIC: 0x8
   • DESCRIPTORS_STATIC_KEEPING_BUFFER_BOUNDS_CHECKS: 0x10000

This ensures better compatibility with the D3D12 API and makes the values
more explicit in the code.

Requested here: #138315 (comment)

---

Full diff: https://github.com/llvm/llvm-project/pull/143201.diff

2 Files Affected:

• (modified) llvm/include/llvm/BinaryFormat/DXContainer.h (+1-1)
• (modified) llvm/include/llvm/BinaryFormat/DXContainerConstants.def (+5-5)

diff --git a/llvm/include/llvm/BinaryFormat/DXContainer.h b/llvm/include/llvm/BinaryFormat/DXContainer.h
index 08949e39716d5..725c405b77e55 100644
--- a/llvm/include/llvm/BinaryFormat/DXContainer.h
+++ b/llvm/include/llvm/BinaryFormat/DXContainer.h
@@ -164,7 +164,7 @@ enum class RootDescriptorFlag : uint32_t {
 #include "DXContainerConstants.def"
 };
 
-#define DESCRIPTOR_RANGE_FLAG(Num, Val) Val = 1ull << Num,
+#define DESCRIPTOR_RANGE_FLAG(Num, Val) Val = Num,
 enum class DescriptorRangeFlag : uint32_t {
 #include "DXContainerConstants.def"
 };
diff --git a/llvm/include/llvm/BinaryFormat/DXContainerConstants.def b/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
index 501ef0c31cdd0..c4895ee8ed655 100644
--- a/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
+++ b/llvm/include/llvm/BinaryFormat/DXContainerConstants.def
@@ -90,11 +90,11 @@ ROOT_DESCRIPTOR_FLAG(3, DATA_STATIC)
 #ifdef DESCRIPTOR_RANGE_FLAG
 
 DESCRIPTOR_RANGE_FLAG(0, NONE)
-DESCRIPTOR_RANGE_FLAG(1, DESCRIPTORS_VOLATILE)
-DESCRIPTOR_RANGE_FLAG(2, DATA_VOLATILE)
-DESCRIPTOR_RANGE_FLAG(3, DATA_STATIC_WHILE_SET_AT_EXECUTE)
-DESCRIPTOR_RANGE_FLAG(4, DATA_STATIC)
-DESCRIPTOR_RANGE_FLAG(16, DESCRIPTORS_STATIC_KEEPING_BUFFER_BOUNDS_CHECKS)
+DESCRIPTOR_RANGE_FLAG(0x1, DESCRIPTORS_VOLATILE)
+DESCRIPTOR_RANGE_FLAG(0x2, DATA_VOLATILE)
+DESCRIPTOR_RANGE_FLAG(0x4, DATA_STATIC_WHILE_SET_AT_EXECUTE)
+DESCRIPTOR_RANGE_FLAG(0x8, DATA_STATIC)
+DESCRIPTOR_RANGE_FLAG(0x10000, DESCRIPTORS_STATIC_KEEPING_BUFFER_BOUNDS_CHECKS)
 #undef DESCRIPTOR_RANGE_FLAG
 #endif // DESCRIPTOR_RANGE_FLAG