25af6d380b
The flag guarantees that the generated function does not have any internal return instructions. If the function returns at all, the return must be the last instruction. For now just implement a verifier check for this property. When we get CFG simplifiers and block layout optimizations, they will need to heed the flag.
56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
"""
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Cretonne shared settings.
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This module defines settings relevant for all code generators.
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"""
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from __future__ import absolute_import
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from cdsl.settings import SettingGroup, BoolSetting, EnumSetting
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group = SettingGroup('shared')
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opt_level = EnumSetting(
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"""
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Optimization level:
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- default: Very profitable optimizations enabled, none slow.
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- best: Enable all optimizations
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- fastest: Optimize for compile time by disabling most optimizations.
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""",
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'default', 'best', 'fastest')
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enable_verifier = BoolSetting(
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"""
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Run the Cretonne IL verifier at strategic times during compilation.
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This makes compilation slower but catches many bugs. The verifier is
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disabled by default, except when reading Cretonne IL from a text file.
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""")
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is_64bit = BoolSetting("Enable 64-bit code generation")
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return_at_end = BoolSetting(
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"""
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Generate functions with at most a single return instruction at the
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end of the function.
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This guarantees that functions do not have any internal return
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instructions. Either they never return, or they have a single return
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instruction at the end.
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""")
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is_compressed = BoolSetting("Enable compressed instructions")
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enable_float = BoolSetting(
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"""Enable the use of floating-point instructions""",
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default=True)
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enable_simd = BoolSetting(
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"""Enable the use of SIMD instructions.""",
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default=True)
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enable_atomics = BoolSetting(
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"""Enable the use of atomic instructions""",
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default=True)
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group.close(globals())
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