[llvm] [SPIRV] Silence unused variable warnings (PR #95492)

[Chris B via llvm-commits]

https://github.com/llvm-beanz created https://github.com/llvm/llvm-project/pull/95492

This change marks a few variable declarations as [[maybe_unused]] to silence unused variable warnings.
../llvm/lib/Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp

>From cffee9c0bee88011e719ef175a14fcc09ffe5d83 Mon Sep 17 00:00:00 2001
From: Chris Bieneman <chris.bieneman at me.com>
Date: Thu, 13 Jun 2024 19:55:33 -0500
Subject: [PATCH] [SPIRV] Silence unused variable warnings

This change marks a few variable declarations as [[maybe_unused]] to
silence unused variable warnings.
../llvm/lib/Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp
---
 .../Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp    | 2 +-
 llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp                         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp b/llvm/lib/Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp
index 7f5f7d0b1e4dc..25e285e35f933 100644
--- a/llvm/lib/Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp
+++ b/llvm/lib/Target/SPIRV/Analysis/SPIRVConvergenceRegionAnalysis.cpp
@@ -138,7 +138,7 @@ ConvergenceRegion::ConvergenceRegion(
     SmallPtrSet<BasicBlock *, 8> &&Blocks, SmallPtrSet<BasicBlock *, 2> &&Exits)
     : DT(DT), LI(LI), ConvergenceToken(ConvergenceToken), Entry(Entry),
       Exits(std::move(Exits)), Blocks(std::move(Blocks)) {
-  for (auto *BB : this->Exits)
+  for ([[maybe_unused]] auto *BB : this->Exits)
     assert(this->Blocks.count(BB) != 0);
   assert(this->Blocks.count(this->Entry) != 0);
 }
diff --git a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
index 2a515359bdd4f..c14e5098be711 100644
--- a/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
+++ b/llvm/lib/Target/SPIRV/SPIRVBuiltins.cpp
@@ -2418,7 +2418,7 @@ Type *parseBuiltinCallArgumentBaseType(const StringRef DemangledCall,
   if (hasBuiltinTypePrefix(TypeStr)) {
     // OpenCL builtin types in demangled call strings have the following format:
     // e.g. ocl_image2d_ro
-    bool IsOCLBuiltinType = TypeStr.consume_front("ocl_");
+    [[maybe_unused]] bool IsOCLBuiltinType = TypeStr.consume_front("ocl_");
     assert(IsOCLBuiltinType && "Invalid OpenCL builtin prefix");
 
     // Check if this is pointer to a builtin type and not just pointer