[llvm] [SPIR-V] Emit SPIR-V generator magic number and version (PR #87951)

[Nathan Gauër via llvm-commits]

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@@ -76,18 +76,23 @@ getSymbolicOperandRequirements(SPIRV::OperandCategory::OperandCategory Category,
                                SPIRV::RequirementHandler &Reqs) {
   static AvoidCapabilitiesSet
       AvoidCaps; // contains capabilities to avoid if there is another option
-  unsigned ReqMinVer = getSymbolicOperandMinVersion(Category, i);
-  unsigned ReqMaxVer = getSymbolicOperandMaxVersion(Category, i);
-  unsigned TargetVer = ST.getSPIRVVersion();
-  bool MinVerOK = !ReqMinVer || !TargetVer || TargetVer >= ReqMinVer;
-  bool MaxVerOK = !ReqMaxVer || !TargetVer || TargetVer <= ReqMaxVer;
+
+  unsigned ReqMinVerDec = getSymbolicOperandMinVersion(Category, i);
+  VersionTuple ReqMinVer = VersionTuple(ReqMinVerDec / 10, ReqMinVerDec % 10);
+  unsigned ReqMaxVerDec = getSymbolicOperandMaxVersion(Category, i);
+  VersionTuple ReqMaxVer = VersionTuple(ReqMaxVerDec / 10, ReqMaxVerDec % 10);
+  VersionTuple SPIRVVersion = ST.getSPIRVVersion();
+  bool MinVerOK =
+      ReqMinVer.empty() || SPIRVVersion.empty() || SPIRVVersion >= ReqMinVer;
+  bool MaxVerOK =
+      ReqMaxVer.empty() || SPIRVVersion.empty() || SPIRVVersion <= ReqMaxVer;
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Keenuts wrote:

nit: `if not provided, version number are considered to be zero`
The min should always be usable without having to check for `empty` since it defaults to the minimum value.

https://github.com/llvm/llvm-project/pull/87951