Remove the vconst instruction and the UnaryImmVector format.

No instruction sets actually have single instructions for materializing
vector constants. You always need to use a constant pool.

Cretonne doesn't have constant pools yet, but it will in the future, and
that is how vector constants should be represented.

lib/cretonne/meta/base/formats.py

@@ -8,7 +8,7 @@ in this module.
 from __future__ import absolute_import
 from cdsl.formats import InstructionFormat
 from cdsl.operands import VALUE, VARIABLE_ARGS
-from .immediates import imm64, uimm8, ieee32, ieee64, immvector, intcc, floatcc
+from .immediates import imm64, uimm8, ieee32, ieee64, intcc, floatcc
 from .entities import ebb, sig_ref, func_ref, jump_table
 
 Nullary = InstructionFormat()
@@ -17,7 +17,6 @@ Unary = InstructionFormat(VALUE)
 UnaryImm = InstructionFormat(imm64)
 UnaryIeee32 = InstructionFormat(ieee32)
 UnaryIeee64 = InstructionFormat(ieee64)
-UnaryImmVector = InstructionFormat(immvector, boxed_storage=True)
 UnarySplit = InstructionFormat(VALUE, multiple_results=True)
 
 Binary = InstructionFormat(VALUE, VALUE)

lib/cretonne/meta/base/immediates.py

@@ -27,12 +27,6 @@ ieee32 = ImmediateKind('ieee32', 'A 32-bit immediate floating point number.')
 #: IEEE 754-2008 binary64 interchange format.
 ieee64 = ImmediateKind('ieee64', 'A 64-bit immediate floating point number.')
 
-#: A large SIMD vector constant.
-immvector = ImmediateKind(
-        'immvector',
-        'An immediate SIMD vector.',
-        rust_type='ImmVector')
-
 #: A condition code for comparing integer values.
 #:
 #: This enumerated operand kind is used for the :cton:inst:`icmp` instruction

lib/cretonne/meta/base/instructions.py

@@ -9,7 +9,7 @@ from cdsl.operands import Operand, VARIABLE_ARGS
 from cdsl.typevar import TypeVar
 from cdsl.instructions import Instruction, InstructionGroup
 from base.types import i8, f32, f64, b1
-from base.immediates import imm64, uimm8, ieee32, ieee64, immvector
+from base.immediates import imm64, uimm8, ieee32, ieee64
 from base.immediates import intcc, floatcc
 from base import entities
 import base.formats  # noqa
@@ -196,16 +196,6 @@ f64const = Instruction(
         """,
         ins=N, outs=a)
 
-N = Operand('N', immvector)
-a = Operand('a', TxN, doc='A constant vector value')
-vconst = Instruction(
-        'vconst', r"""
-        Vector constant (floating point or integer).
-
-        Create a SIMD vector value where the lanes don't have to be identical.
-        """,
-        ins=N, outs=a)
-
 #
 # Generics.
 #