[llvm] add support for the SPV_KHR_linkonce_odr extension (PR #81512)

[via llvm-commits]

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``````````bash
git-clang-format --diff 32eb95cc40d93bc5fb67e0b52531f7620204ec8c 41b1ca1263ac2afe8cd4298be6fd6561c4cfa382 -- llvm/lib/Target/SPIRV/SPIRVCallLowering.cpp llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp llvm/lib/Target/SPIRV/SPIRVModuleAnalysis.cpp llvm/lib/Target/SPIRV/SPIRVSubtarget.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/lib/Target/SPIRV/SPIRVCallLowering.cpp b/llvm/lib/Target/SPIRV/SPIRVCallLowering.cpp
index fd287f2a94..baeed2ad89 100644
--- a/llvm/lib/Target/SPIRV/SPIRVCallLowering.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVCallLowering.cpp
@@ -346,13 +346,14 @@ bool SPIRVCallLowering::lowerFormalArguments(MachineIRBuilder &MIRBuilder,
     addStringImm(F.getName(), MIB);
   } else if (F.getLinkage() == GlobalValue::LinkageTypes::ExternalLinkage ||
              F.getLinkage() == GlobalValue::LinkOnceODRLinkage) {
-    SPIRV::LinkageType::LinkageType LnkTy = F.isDeclaration()
-                     ? SPIRV::LinkageType::Import
-                     : (F.getLinkage() == GlobalValue::LinkOnceODRLinkage &&
-                                ST->canUseExtension(
-                                    SPIRV::Extension::SPV_KHR_linkonce_odr)
-                            ? SPIRV::LinkageType::LinkOnceODR
-                            : SPIRV::LinkageType::Export);
+    SPIRV::LinkageType::LinkageType LnkTy =
+        F.isDeclaration()
+            ? SPIRV::LinkageType::Import
+            : (F.getLinkage() == GlobalValue::LinkOnceODRLinkage &&
+                       ST->canUseExtension(
+                           SPIRV::Extension::SPV_KHR_linkonce_odr)
+                   ? SPIRV::LinkageType::LinkOnceODR
+                   : SPIRV::LinkageType::Export);
     buildOpDecorate(FuncVReg, MIRBuilder, SPIRV::Decoration::LinkageAttributes,
                     {static_cast<uint32_t>(LnkTy)}, F.getGlobalIdentifier());
   }
diff --git a/llvm/lib/Target/SPIRV/SPIRVSubtarget.cpp b/llvm/lib/Target/SPIRV/SPIRVSubtarget.cpp
index 6bcd8d4d51..354cd5d9b2 100644
--- a/llvm/lib/Target/SPIRV/SPIRVSubtarget.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVSubtarget.cpp
@@ -54,11 +54,11 @@ cl::list<SPIRV::Extension::Extension> Extensions(
                    "SPV_KHR_bit_instructions",
                    "This enables bit instructions to be used by SPIR-V modules "
                    "without requiring the Shader capability"),
-        clEnumValN(SPIRV::Extension::SPV_KHR_linkonce_odr,
-                   "SPV_KHR_linkonce_odr",
-                   "Allows to use the LinkOnceODR linkage type that is to let "
-                   "a function or global variable to be merged with other functions "
-                   "or global variables of the same name when linkage occurs."),
+        clEnumValN(
+            SPIRV::Extension::SPV_KHR_linkonce_odr, "SPV_KHR_linkonce_odr",
+            "Allows to use the LinkOnceODR linkage type that is to let "
+            "a function or global variable to be merged with other functions "
+            "or global variables of the same name when linkage occurs."),
         clEnumValN(SPIRV::Extension::SPV_INTEL_function_pointers,
                    "SPV_INTEL_function_pointers",
                    "Allows translation of function pointers")));

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https://github.com/llvm/llvm-project/pull/81512