[llvm] [DirectX backend] generate ISG1, OSG1 part for compute shader (PR #90508)

[Chris B via llvm-commits]

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@@ -104,6 +110,50 @@ GlobalVariable *DXContainerGlobals::computeShaderHash(Module &M) {
   return GV;
 }
 
+GlobalVariable *DXContainerGlobals::buildContainerGlobal(
+    Module &M, Constant *Content, StringRef Name, StringRef SectionName) {
+  auto *GV = new llvm::GlobalVariable(
+      M, Content->getType(), true, GlobalValue::PrivateLinkage, Content, Name);
+  GV->setSection(SectionName);
+  GV->setAlignment(Align(4));
+  return GV;
+}
+
+GlobalVariable *DXContainerGlobals::buildInputSingature(Module &M,
+                                                        Constant *Content) {
+  return buildContainerGlobal(M, Content, "dx.isg1", "ISG1");
+}
+GlobalVariable *DXContainerGlobals::buildOutputSingature(Module &M,
+                                                         Constant *Content) {
+  return buildContainerGlobal(M, Content, "dx.osg1", "OSG1");
+}
+
+void DXContainerGlobals::addSingature(Module &M,
+                                      SmallVector<GlobalValue *> &Globals,
+                                      Triple &TT) {
+  dxbc::ProgramSignatureHeader Sig;
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llvm-beanz wrote:

See: https://github.com/llvm/llvm-project/blob/main/llvm/include/llvm/MC/DXContainerPSVInfo.h#L86

https://github.com/llvm/llvm-project/pull/90508