[llvm] [DirectX] Add Range Overlap validation (PR #152229)

[Finn Plummer via llvm-commits]

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@@ -0,0 +1,14 @@
+; RUN: not opt -S -passes='dxil-post-optimization-validation' -mtriple=dxil-pc-shadermodel6.6-compute %s 2>&1 | FileCheck %s
+; CHECK: error: register UAV (space=1, register=3) is overlapping with register UAV (space=1, register=0), verify your root signature definition.
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inbelic wrote:

This error message would seemingly indicate that they shouldn't have overlapped? Maybe something like:
`resource UAV(space=1, registers=[3,3]) is overlapping with resource UAV (space=1,registers=[0,3]), ...`?

https://github.com/llvm/llvm-project/pull/152229