[llvm-branch-commits] [llvm] [HLSL] Adding support for Root Constants in LLVM Metadata (PR #135085)

[via llvm-branch-commits]

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@@ -0,0 +1,34 @@
+; 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 [48 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 } ; function, root signature
+!3 = !{ !4, !5 } ; list of root signature elements
+!4 = !{ !"RootFlags", i32 1 } ; 1 = allow_input_assembler_input_layout
+!5 = !{ !"RootConstants", i32 0, i32 1, i32 2, i32 3 }
+
+; DXC:  - Name:            RTS0
+; DXC-NEXT:    Size:            48
+; DXC-NEXT:    RootSignature:
+; DXC-NEXT:      Version:         2
+; DXC-NEXT:      NumStaticSamplers: 0
+; DXC-NEXT:      StaticSamplersOffset: 0
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joaosaffran wrote:

The difference comes to the fact that `obj2yaml` has no support for static samplers yet. So those tools are not dealing with this value consistently. This will be fixed when adding the support is added to `obj2yaml`

https://github.com/llvm/llvm-project/pull/135085