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llvm_ir_generator: update debug info emission for LLVM 3.8.
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whitequark
parent
132b55d6be
commit
b1f371e578
@ -42,126 +42,89 @@ def memoize(generator):
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class DebugInfoEmitter:
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def __init__(self, llmodule):
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self.llmodule = llmodule
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self.llsubprograms = []
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self.cache = {}
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self.subprograms = []
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def emit(self, operands):
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def emit_metadata(self, operands):
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def map_operand(operand):
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if operand is None:
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return ll.Constant(llmetadata, None)
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elif isinstance(operand, str):
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return ll.MetaDataString(self.llmodule, operand)
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elif isinstance(operand, bool):
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return ll.Constant(lli1, operand)
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elif isinstance(operand, int):
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return ll.Constant(lli32, operand)
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elif isinstance(operand, (list, tuple)):
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return self.emit(operand)
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elif isinstance(operand, ll.Value):
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return operand
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return self.emit_metadata(operand)
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else:
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print(operand)
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assert False
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assert isinstance(operand, ll.NamedValue)
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return operand
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return self.llmodule.add_metadata(list(map(map_operand, operands)))
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@memoize
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def emit_filename(self, source_buffer):
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source_dir, source_file = os.path.split(source_buffer.name)
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return self.emit([source_file, source_dir])
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@memoize
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def emit_compile_unit(self, source_buffer, llsubprograms):
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return self.emit([
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DW_TAG_compile_unit,
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self.emit_filename(source_buffer), # filename
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DW_LANG_Python, # source language
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"ARTIQ", # producer
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False, # optimized?
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"", # linker flags
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0, # runtime version
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[], # enum types
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[], # retained types
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llsubprograms, # subprograms
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[], # global variables
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[], # imported entities
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"", # split debug filename
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2, # kind (full=1, lines only=2)
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])
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def emit_debug_info(self, kind, operands, is_distinct=False):
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return self.llmodule.add_debug_info(kind, operands, is_distinct)
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@memoize
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def emit_file(self, source_buffer):
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return self.emit([
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DW_TAG_file_type,
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self.emit_filename(source_buffer), # filename
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])
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source_dir, source_file = os.path.split(source_buffer.name)
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return self.emit_debug_info("DIFile", {
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"filename": source_file,
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"directory": source_dir,
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})
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@memoize
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def emit_compile_unit(self, source_buffer, llsubprograms):
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return self.emit_debug_info("DICompileUnit", {
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"language": ll.DIToken("DW_LANG_C99"),
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"file": self.emit_file(source_buffer),
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"producer": "ARTIQ",
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"runtimeVersion": 0,
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"emissionKind": 2, # full=1, lines only=2
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"subprograms": self.emit_metadata(llsubprograms)
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}, is_distinct=True)
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@memoize
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def emit_subroutine_type(self, typ):
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return self.emit([
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DW_TAG_subroutine_type,
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None, # filename
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None, # context descriptor
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"", # name
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0, # line number
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0, # (i64) size in bits
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0, # (i64) alignment in bits
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0, # (i64) offset in bits
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0, # flags
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None, # derived from
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[None], # members
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0, # runtime languages
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None, # base type with vtable pointer
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None, # template parameters
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None # unique identifier
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])
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return self.emit_debug_info("DISubroutineType", {
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"types": self.emit_metadata([None])
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})
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@memoize
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def emit_subprogram(self, func, llfunc):
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source_buffer = func.loc.source_buffer
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display_name = "{}{}".format(func.name, types.TypePrinter().name(func.type))
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subprogram = self.emit([
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DW_TAG_subprogram,
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self.emit_filename(source_buffer), # filename
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self.emit_file(source_buffer), # context descriptor
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func.name, # name
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display_name, # display name
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llfunc.name, # linkage name
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func.loc.line(), # line number where defined
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self.emit_subroutine_type(func.type), # type descriptor
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func.is_internal, # local to compile unit?
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True, # global is defined in the compile unit?
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0, # virtuality
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0, # index into a virtual function
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None, # base type with vtable pointer
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0, # flags
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False, # optimized?
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llfunc, # LLVM function
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None, # template parameters
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None, # function declaration descriptor
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[], # function variables
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func.loc.line(), # line number where scope begins
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])
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self.subprograms.append(subprogram)
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return subprogram
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llsubprogram = self.emit_debug_info("DISubprogram", {
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"name": func.name,
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"linkageName": llfunc.name,
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"type": self.emit_subroutine_type(func.type),
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"file": self.emit_file(source_buffer),
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"line": func.loc.line(),
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"scope": self.emit_file(source_buffer),
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"scopeLine": func.loc.line(),
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"isLocal": func.is_internal,
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"isDefinition": True,
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"variables": self.emit_metadata([])
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}, is_distinct=True)
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self.llsubprograms.append(llsubprogram)
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return llsubprogram
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@memoize
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def emit_loc(self, loc, scope, inlined_scope=None):
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return self.emit([
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loc.line(), # line
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loc.column(), # column
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scope, # scope
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inlined_scope, # inlined scope
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])
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def emit_loc(self, loc, scope):
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return self.emit_debug_info("DILocation", {
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"line": loc.line(),
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"column": loc.column(),
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"scope": scope
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})
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def finalize(self, source_buffer):
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llident = self.llmodule.add_named_metadata('llvm.ident')
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llident.add(self.emit(["ARTIQ"]))
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llident.add(self.emit_metadata(["ARTIQ"]))
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llflags = self.llmodule.add_named_metadata('llvm.module.flags')
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llflags.add(self.emit([2, "Debug Info Version", 1]))
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llflags.add(self.emit_metadata([2, "Debug Info Version", 3]))
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llflags.add(self.emit_metadata([2, "Dwarf Version", 4]))
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llcompile_units = self.llmodule.add_named_metadata('llvm.dbg.cu')
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llcompile_units.add(self.emit_compile_unit(source_buffer, tuple(self.subprograms)))
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llcompile_units.add(self.emit_compile_unit(source_buffer, tuple(self.llsubprograms)))
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class LLVMIRGenerator:
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@ -578,6 +541,7 @@ class LLVMIRGenerator:
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llblock_map = {}
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disubprogram = self.debug_info_emitter.emit_subprogram(func, self.llfunction)
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self.llfunction.set_metadata('dbg', disubprogram)
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# First, map arguments.
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if self.has_sret(func.type):
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@ -683,15 +647,15 @@ class LLVMIRGenerator:
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llptr = self.llbuilder.gep(llenv, [self.llindex(0), self.llindex(outer_index)],
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inbounds=True)
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llouterenv = self.llbuilder.load(llptr)
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llouterenv.metadata['invariant.load'] = self.empty_metadata
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llouterenv.metadata['nonnull'] = self.empty_metadata
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llouterenv.set_metadata('invariant.load', self.empty_metadata)
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llouterenv.set_metadata('nonnull', self.empty_metadata)
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return self.llptr_to_var(llouterenv, env_ty.params["$outer"], var_name)
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def mark_dereferenceable(self, load):
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assert isinstance(load, ll.LoadInstr) and isinstance(load.type, ll.PointerType)
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pointee_size = load.type.pointee.get_abi_size(self.lldatalayout, context=self.llcontext)
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metadata = self.llmodule.add_metadata([ll.Constant(lli64, pointee_size)])
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load.metadata['dereferenceable'] = metadata
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load.set_metadata('dereferenceable', metadata)
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def process_GetLocal(self, insn):
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env = insn.environment()
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@ -821,7 +785,7 @@ class LLVMIRGenerator:
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inbounds=True, name="ptr.{}".format(insn.name))
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llvalue = self.llbuilder.load(llptr, name="val.{}".format(insn.name))
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if types.is_instance(typ) and attr in typ.constant_attributes:
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llvalue.metadata['invariant.load'] = self.empty_metadata
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llvalue.set_metadata('invariant.load', self.empty_metadata)
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if isinstance(llvalue.type, ll.PointerType):
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self.mark_dereferenceable(llvalue)
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return llvalue
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@ -1065,8 +1029,8 @@ class LLVMIRGenerator:
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llptr = self.llbuilder.gep(llenv, [self.llindex(0), self.llindex(outer_index)],
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inbounds=True)
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llouterenv = self.llbuilder.load(llptr)
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llouterenv.metadata['invariant.load'] = self.empty_metadata
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llouterenv.metadata['nonnull'] = self.empty_metadata
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llouterenv.set_metadata('invariant.load', self.empty_metadata)
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llouterenv.set_metadata('nonnull', self.empty_metadata)
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return self.llptr_to_var(llouterenv, env_ty.params["$outer"], var_name)
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else:
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return llenv
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@ -1325,7 +1289,7 @@ class LLVMIRGenerator:
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# Never add TBAA nowrite metadata to a functon with sret!
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# This leads to miscompilations.
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if types.is_c_function(functiontyp) and 'nowrite' in functiontyp.flags:
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llcall.metadata['tbaa'] = self.tbaa_nowrite_call
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llcall.set_metadata('tbaa', self.tbaa_nowrite_call)
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return llresult
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@ -1358,7 +1322,7 @@ class LLVMIRGenerator:
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# See the comment in process_Call.
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if types.is_c_function(functiontyp) and 'nowrite' in functiontyp.flags:
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llcall.metadata['tbaa'] = self.tbaa_nowrite_call
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llcall.set_metadata('tbaa', self.tbaa_nowrite_call)
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return llcall
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