SamplerDescriptorHeap = ResourceDescriptorHeap crashes DXC

Description

Assigning the ResourceHeap to the SamplerHeap crashes DXC.

// RUN: %dxc -T cs_6_6 %s | FileCheck %s

[numthreads(1, 1, 1)]
void main() {
  SamplerDescriptorHeap = ResourceDescriptorHeap;
}

$ dxc -T cs_6_6 repro.hlsl
DirectXShaderCompiler/tools/clang/lib/CodeGen/CodeGenTypes.cpp:795: const CGRecordLayout &clang::CodeGen::CodeGenTypes::getCGRecordLayout(const RecordDecl *): Assertion `Layout && "Unable to find record layout information for type"' failed.

Similar bug, but different stacktrace:

[numthreads(1, 1, 1)]
void main() {
  ResourceDescriptorHeap = ResourceDescriptorHeap[0];
}

[numthreads(1, 1, 1)]
void main() {
  ResourceDescriptorHeap[0];
}

[numthreads(1, 1, 1)]
void main() {
  ResourceDescriptorHeap[0][1];
}

Environment

• DXC version: HEAD (128e6ce2be8f09539c97cf28d6066d9a6b32b15c)
• Host Operating System: Linux

Start by running the supplied HLSL reproducers with dxc and inspect the assertion in tools/clang/lib/CodeGen/CodeGenTypes.cpp. Compare the assignment and indexing cases, then use the existing RUN/FileCheck pattern for regression coverage. Done means these inputs no longer crash DXC.