[llvm] [SPIR-V] Emit UniformId decoration as OpDecorateId with a Scope id operand (PR #207958)

[Arseniy Obolenskiy via llvm-commits]

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@@ -318,9 +318,27 @@ void buildOpSpirvDecorations(Register Reg, MachineIRBuilder &MIRBuilder,
             static_cast<uint32_t>(SPIRV::Decoration::FPFastMathMode)) {
       continue; // Ignored.
     }
-    auto MIB = MIRBuilder.buildInstr(SPIRV::OpDecorate)
-                   .addUse(Reg)
-                   .addImm(static_cast<uint32_t>(DecorationId->getZExtValue()));
+    uint32_t Dec = static_cast<uint32_t>(DecorationId->getZExtValue());
+    if (Dec == static_cast<uint32_t>(SPIRV::Decoration::UniformId)) {
+      ConstantInt *ScopeV =
+          OpMD->getNumOperands() > 1
+              ? mdconst::dyn_extract<ConstantInt>(OpMD->getOperand(1))
+              : nullptr;
+      if (!ScopeV || !isUInt<32>(ScopeV->getZExtValue()))
+        report_fatal_error("Expect Scope <id> operand of the UniformId "
+                           "decoration");
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aobolensk wrote:

Switched to assert. Thanks for the feedback

https://github.com/llvm/llvm-project/pull/207958