[SPIR-V] Support SPV_INTEL_fp_max_error extension for !fpmath metadata (llvm#130619)

Specification:

https://github.khronos.org/SPIRV-Registry/extensions/INTEL/SPV_INTEL_fp_max_error.html

Author: VishMCW

llvm/include/llvm/IR/IntrinsicsSPIRV.td

@@ -140,6 +140,7 @@ let TargetPrefix = "spv" in {
 
   // Memory aliasing intrinsics
   def int_spv_assign_aliasing_decoration : Intrinsic<[], [llvm_any_ty, llvm_i32_ty, llvm_metadata_ty], [ImmArg<ArgIndex<1>>]>;
+
   // FPMaxErrorDecorationINTEL
   def int_spv_assign_fpmaxerror_decoration: Intrinsic<[], [llvm_any_ty, llvm_metadata_ty]>;
 }

llvm/lib/Target/SPIRV/SPIRVSymbolicOperands.td

@@ -515,6 +515,7 @@ defm MemoryAccessAliasingINTEL : CapabilityOperand<5910, 0, 0, [SPV_INTEL_memory
 defm FPMaxErrorINTEL : CapabilityOperand<6169, 0, 0, [SPV_INTEL_fp_max_error], []>;
 defm FPGAMemoryAccessesINTEL : CapabilityOperand<5898, 0, 0, [SPV_INTEL_fpga_memory_accesses], []>;
 defm MemoryAccessAliasingINTEL : CapabilityOperand<5910, 0, 0, [SPV_INTEL_memory_access_aliasing], []>;
+defm FPMaxErrorINTEL : CapabilityOperand<6169, 0, 0, [SPV_INTEL_fp_max_error], []>;
 
 //===----------------------------------------------------------------------===//
 // Multiclass used to define SourceLanguage enum values and at the same time
@@ -1272,6 +1273,7 @@ defm DontStaticallyCoalesceINTEL  : DecorationOperand<5901, 0, 0, [], [FPGAMemor
 defm PrefetchINTEL : DecorationOperand<5902, 0, 0, [], [FPGAMemoryAccessesINTEL]>;
 defm AliasScopeINTEL : DecorationOperand<5914, 0, 0, [], [MemoryAccessAliasingINTEL]>;
 defm NoAliasINTEL : DecorationOperand<5915, 0, 0, [], [MemoryAccessAliasingINTEL]>;
+defm FPMaxErrorDecorationINTEL : DecorationOperand<6170, 0, 0, [], [FPMaxErrorINTEL]>;
 
 
 //===----------------------------------------------------------------------===//