Release v2026.2

• General
  • Fix build for NonSemanticShaderDebugInfo in GN (#6647)
  • Support SPV_KHR_abort and SPV_KHR_constant_data (#6625)
  • Support versioned NonSemanticShaderDebugInfo imports (#6555)
  • Fix C++20 compilation issue with large integer literals (#6557)
  • Remove SVA (Shader Validation Assistant) (#6550)
  • Improved Kokoro build configuration and storage usage (#6573, #6551)
  • Various dependency rolls and CI updates
• Optimizer
  • Fold OpCompositeExtract feeding from OpCopyLogical or OpLoad (#6614)
  • Fix DebugValue placements and initialization (#6599, #6626)
  • Support OpConstantCompositeReplicateEXT in constant manager (#6616)
  • Aggressive DCE support for untyped pointers and OpUntypedVariableKHR (#6602, #6607)
  • Optimize SPV_EXT_opacity_micromap and SPV_EXT_shader_invocation_reorder (#6571)
  • Add LegalizeMultidimArrayPass and improve access chain reordering (#6535, #6545)
  • Added various folding and reassociation rules (#6453, #6504, #6454, #6456)
  • Support for optimizing SPV_NV_push_constant_bank (#6547)
• Validator
  • Add validation for 4-bit integer types (#6644)
  • Support and validate SPV_KHR_constant_data (OpConstantDataKHR, OpSpecConstantDataKHR) (#6646, #6643, #6642)
  • Validate NonSemanticShaderDebugInfo 101 and versioned imports (#6635, #6555)
  • Improve validation for Intel SPIR-V extensions and various KHR/EXT extensions (#6232, #6589, #6583, etc.)
  • Extensive validation coverage for OpSpecConstantOp (#6596, #6585, #6582, #6579, #6578, #6576)
  • Check output location uniqueness for GeometryStreams (#6630)
  • Improved validation for variables, constants, and types (#6634, #6598, #6595, #6568)
  • Added validation for several new opcodes and capabilities (OpGroupAsyncCopy, OpLifetimeStart/Stop, etc.) (#6519, #6514, #6515)
• Assembler/Disassembler
  • Add --handle-unknown-opcodes flag to spirv-dis (#6604)
  • Handle leading + in hex float literals in assembler (#6565)
  • Validate bit width of float types with explicit encodings in assembler (#6562)