SPIR-V validation failed: OpenCL.DebugInfo.100 DebugFunction: expected operand Declaration must be a result id of DebugFunctionDeclaration

[pvelesko]

; Steps to reproduce:
; 1. llvm-spirv --spirv-max-version=1.1 --spirv-ext=+all -o reproducer.spv debug_spirv_reproducer.ll
; 2. spirv-val reproducer.spv
;
; Expected error:
; SPIR-V validation failed: OpenCL.DebugInfo.100 DebugFunction: expected operand Declaration must be a result id of DebugFunctionDeclaration
; %N = OpExtInst %void %2 DebugFunction %M %L %K 4 0 %J %O FlagIsDefinition|FlagPrototyped 4 %_Z5kernelv %P
;
; The issue: llvm-spirv generates DebugFunction with DebugInfoNone instead of DebugFunctionDeclaration

debug_spirv_reproducer.ll.zip