[llvm-branch-commits] [clang] [HLSL] Implement default constant buffer `$Globals` (PR #125807)

[Sarah Spall via llvm-branch-commits]

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@@ -0,0 +1,43 @@
+// RUN: %clang_cc1 -finclude-default-header -triple dxil-pc-shadermodel6.3-compute \
+// RUN:   -fnative-half-type -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
+
+// CHECK: %"struct.__cblayout_$Globals" = type { float, float, %struct.__cblayout_S }
+// CHECK: %struct.__cblayout_S = type { float }
+
+// CHECK-DAG: @"$Globals.cb" = external constant target("dx.CBuffer", %"struct.__cblayout_$Globals")
+// CHECK-DAG: @a = external addrspace(2) global float
+// CHECK-DAG: @g = external addrspace(2) global float
+// CHECK-DAG: @h = external addrspace(2) global %struct.__cblayout_S
+
+struct EmptyStruct {
+};
+
+struct S {
+  RWBuffer<float> buf;
+  EmptyStruct es;
+  float ea[0];
+  float b;
+};
+
+float a;
+RWBuffer<float> b; 
+EmptyStruct c;
+float d[0];
+RWBuffer<float> e[2];
+groupshared float f;
+float g;
+S h;
+
+RWBuffer<float> Buf;
+
+[numthreads(4,1,1)]
+void main() {
+  Buf[0] = a;
+}
+
+// CHECK: !hlsl.cblayouts = !{![[S_LAYOUT:.*]], ![[CB_LAYOUT:.*]]}
+// CHECK: !hlsl.cbs = !{![[CB:.*]]}
+
+// CHECK: ![[S_LAYOUT]] = !{!"struct.__cblayout_S", i32 4, i32 0}
+// CHECK: ![[CB_LAYOUT]] = !{!"struct.__cblayout_$Globals", i32 20, i32 0, i32 4, i32 16}
+// CHECK: ![[CB]] = !{ptr @"$Globals.cb", ptr addrspace(2) @a, ptr addrspace(2) @g, ptr addrspace(2) @h}
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spall wrote:

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https://github.com/llvm/llvm-project/pull/125807