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Use the target-lexicon crate.

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This switches from a custom list of architectures to use the
target-lexicon crate.

 - "set is_64bit=1; isa x86" is replaced with "target x86_64", and
   similar for other architectures, and the `is_64bit` flag is removed
   entirely.

 - The `is_compressed` flag is removed too; it's no longer being used to
   control REX prefixes on x86-64, ARM and Thumb are separate
   architectures in target-lexicon, and we can figure out how to
   select RISC-V compressed encodings when we're ready.
This commit is contained in:
Dan Gohman
2018-05-25 11:41:14 -07:00
parent 2f3008aa40
commit 4e67e08efd
131 changed files with 487 additions and 499 deletions
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4
lib/codegen/meta/base/settings.py
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@@ -27,8 +27,6 @@ enable_verifier = BoolSetting(
""",
default=True)
is_64bit = BoolSetting("Enable 64-bit code generation")
call_conv = EnumSetting(
"""
Default calling convention:
@@ -89,8 +87,6 @@ avoid_div_traps = BoolSetting(
this setting has no effect - explicit checks are always inserted.
""")
is_compressed = BoolSetting("Enable compressed instructions")
enable_float = BoolSetting(
"""
Enable the use of floating-point instructions