[SPIRV] Mark maybe unused extractSubvector variable

[pow2clk]

Change #115178 introduced a variable that is only used in an assert, which could result in an unused variable warning in builds without asserts enabled. This just addes the maybe_unused attribute to silence the warning.

[pow2clk]

Hi @s-perron, Really simple followup.

[llvmbot]

@llvm/pr-subscribers-backend-spir-v

Author: Greg Roth (pow2clk)

Changes

Change #115178 introduced a variable that is only used in an assert, which could result in an unused variable warning in builds without asserts enabled. This just addes the maybe_unused attribute to silence the warning.

---

Full diff: https://github.com/llvm/llvm-project/pull/116117.diff

1 Files Affected:

• (modified) llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp (+1-1)

diff --git a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
index 8a8835e0269200..4e6fce96087c93 100644
--- a/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVInstructionSelector.cpp
@@ -2941,7 +2941,7 @@ void SPIRVInstructionSelector::extractSubvector(
     Register &ResVReg, const SPIRVType *ResType, Register &ReadReg,
     MachineInstr &InsertionPoint) const {
   SPIRVType *InputType = GR.getResultType(ReadReg);
-  uint64_t InputSize = GR.getScalarOrVectorComponentCount(InputType);
+  [[maybe_unused]] uint64_t InputSize = GR.getScalarOrVectorComponentCount(InputType);
   uint64_t ResultSize = GR.getScalarOrVectorComponentCount(ResType);
   assert(InputSize > 1 && "The input must be a vector.");
   assert(ResultSize > 1 && "The result must be a vector.");

[github-actions]

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