[llvm] [UpdateTestChecks] Add support for SPIRV in update_llc_test_checks.py (PR #66213)

[Paulo Matos via llvm-commits]

pmatos wrote:

> > > Why not just match OpName ? ASM_FUNCTION_X86_RE does something similar in matching the func name a few lines before the "Begin function" tag
> > 
> > 
> > As far as I understand we need to grab the body of the function. In the case of SPIRV, the body doesn't come after the name. Take the case of 2 functions called void1 and void2:
> > ```
> > 	OpCapability Kernel
> > 	OpCapability Addresses
> > 	OpCapability Linkage
> > 	OpCapability OptNoneINTEL
> > 	OpExtension "SPV_INTEL_optnone"
> > 	%1 = OpExtInstImport "OpenCL.std"
> > 	OpMemoryModel Physical32 OpenCL
> > 	OpExecutionMode %4 ContractionOff
> > 	OpExecutionMode %5 ContractionOff
> > 	OpSource Unknown 0
> > 	OpName %4 "void1"
> > 	OpName %5 "void2"
> > 	OpDecorate %4 LinkageAttributes "void1" Export
> > 	OpDecorate %5 LinkageAttributes "void2" Export
> > 	%2 = OpTypeVoid
> > 	%3 = OpTypeFunction %2
> > 	%4 = OpFunction %2 DontInline %3        ; -- Begin function void1
> > 	%6 = OpLabel
> > 	OpReturn
> > 	OpFunctionEnd
> >                                         ; -- End function
> > 	%5 = OpFunction %2 DontInline %3        ; -- Begin function void2
> > 	%7 = OpLabel
> > 	OpReturn
> > 	OpFunctionEnd
> >                                         ; -- End function
> > ```
> > 
> > 
> >     
> >       
> >     
> > 
> >       
> >     
> > 
> >     
> >   
> > How would you grab with a regex the body of void2 if I parse the name from OpName?
> 
> How about something like something along the line of: "OpName (?P%[0-9_]+)(._\n)+"\1 = OpFunction._\n(?P.*?)OpFunctionEnd"

Thanks, I have updated the patch with a regex based on your suggestion that seems to work well.

https://github.com/llvm/llvm-project/pull/66213