[llvm] [SPIRV] Emit NonSemantic DebugFunctionDeclaration for DISubprograms (declarations). (PR #203615)

[Juan Manuel Martinez Caamaño via llvm-commits]

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@@ -567,15 +676,18 @@ void SPIRVNonSemanticDebugHandler::emitNonSemanticGlobalDebugInfo(
 
   // Emit DebugSource and DebugCompilationUnit for each compile unit.
   for (auto [Info, SrcLangReg] : llvm::zip(CompileUnits, SrcLangRegs)) {
-    MCRegister FileStrReg = getCachedOpStringReg(Info.FilePath);
-    MCRegister DebugSourceReg =
-        emitExtInst(SPIRV::NonSemanticExtInst::DebugSource, VoidTypeReg,
-                    ExtInstSetReg, {FileStrReg}, MAI);
-    emitExtInst(
+    MCRegister FileStrReg = ScopeToPathOpStringReg.lookup(Info.TheCU);
+    assert(FileStrReg.isValid() &&
+           "CU path OpString must be emitted in emitNonSemanticDebugStrings");
+    MCRegister DebugSourceReg = getOrEmitDebugSourceForFileStrReg(
+        FileStrReg, VoidTypeReg, ExtInstSetReg, MAI);
+    MCRegister CUDbgReg = emitExtInst(
         SPIRV::NonSemanticExtInst::DebugCompilationUnit, VoidTypeReg,
         ExtInstSetReg,
         {DebugInfoVersionReg, DwarfVersionReg, DebugSourceReg, SrcLangReg},
         MAI);
+    if (Info.TheCU)
+      CUToCompilationUnitDbgReg[Info.TheCU] = CUDbgReg;
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jmmartinez wrote:

Can we add a test with more than one CU ?

https://github.com/llvm/llvm-project/pull/203615