[llvm] [HLSL] Add descriptor table metadata parsing (PR #142492)

[Justin Bogner via llvm-commits]

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@@ -0,0 +1,48 @@
+; RUN: opt %s -dxil-embed -dxil-globals -S -o - | FileCheck %s
+; RUN: llc %s --filetype=obj -o - | obj2yaml | FileCheck %s --check-prefix=DXC
+
+target triple = "dxil-unknown-shadermodel6.0-compute"
+
+; CHECK: @dx.rts0 = private constant [92 x i8]  c"{{.*}}", section "RTS0", align 4
+
+define void @main() #0 {
+entry:
+  ret void
+}
+attributes #0 = { "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" }
+
+
+!dx.rootsignatures = !{!2} ; list of function/root signature pairs
+!2 = !{ ptr @main, !3, i32 2 } ; function, root signature
+!3 = !{ !5 } ; list of root signature elements
+!5 = !{ !"DescriptorTable", i32 0, !6, !7 }
+!6 = !{ !"SRV", i32 0, i32 1, i32 0, i32 -1, i32 4 }
+!7 = !{ !"UAV", i32 5, i32 1, i32 10, i32 5, i32 2 }
+
+; DXC:  - Name:            RTS0
+; DXC-NEXT:    Size:            92
+; DXC-NEXT:    RootSignature:
+; DXC-NEXT:      Version:         2
+; DXC-NEXT:      NumRootParameters: 1 
+; DXC-NEXT:      RootParametersOffset: 24 
+; DXC-NEXT:      NumStaticSamplers: 0
+; DXC-NEXT:      StaticSamplersOffset: 0
+; DXC-NEXT:      Parameters:
+; DXC-NEXT:        - ParameterType:   0
+; DXC-NEXT:          ShaderVisibility: 0
+; DXC-NEXT:          Table:
+; DXC-NEXT:            NumRanges:       2
+; DXC-NEXT:            RangesOffset:    44
+; DXC-NEXT:            Ranges:
+; DXC-NEXT:              - RangeType:       0
+; DXC-NEXT:                NumDescriptors:  0
+; DXC-NEXT:                BaseShaderRegister: 1
+; DXC-NEXT:                RegisterSpace:   0
+; DXC-NEXT:                OffsetInDescriptorsFromTableStart: 4294967295
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bogner wrote:

Shouldn't this be 0?

https://github.com/llvm/llvm-project/pull/142492