[llvm] [SPIRV] Fix -Wunused-variable (PR #219207)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/219207

These variables are only used in assertions but are used multiple times/do not make sense to inline, so mark them [[maybe_unused]].

>From 408e80092e3fd56053085eaeaddcabe4ffa68cc5 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Thu, 27 Aug 2026 13:07:56 +0000
Subject: [PATCH] [SPIRV] Fix -Wunused-variable

These variables are only used in assertions but are used multiple
times/do not make sense to inline, so mark them [[maybe_unused]].
---
 llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp      | 2 +-
 llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp b/llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp
index 433edbfb12a9f..29d21fb9447ca 100644
--- a/llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVGlobalRegistry.cpp
@@ -635,7 +635,7 @@ Register SPIRVGlobalRegistry::getOrCreateConstVector(const APInt &Val,
          "Expected vector type for constant vector creation");
   const FixedVectorType *LLVMVecTy = cast<FixedVectorType>(LLVMTy);
   Type *LLVMBaseTy = LLVMVecTy->getElementType();
-  const auto &ST = I.getMF()->getSubtarget<SPIRVSubtarget>();
+  [[maybe_unused]] const auto &ST = I.getMF()->getSubtarget<SPIRVSubtarget>();
   assert((LLVMBaseTy->isIntegerTy() ||
           (LLVMBaseTy->isPointerTy() &&
            ST.canUseExtension(
diff --git a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
index e64c5ad38ba2a..2ec4ede8dd8f5 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
@@ -6745,7 +6745,7 @@ bool SPIRVInstructionSelector::extractSubvector(
   [[maybe_unused]] uint64_t InputSize =
       GR.getScalarOrVectorComponentCount(InputType);
   uint64_t ResultSize = GR.getScalarOrVectorComponentCount(ResType);
-  bool IsLongVectorEXT =
+  [[maybe_unused]] bool IsLongVectorEXT =
       STI.canUseExtension(SPIRV::Extension::SPV_EXT_long_vector);
   assert((InputSize > 1 || IsLongVectorEXT) && "The input must be a vector.");
   assert((ResultSize > 1 || IsLongVectorEXT) && "The result must be a vector.");