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.

docs/langref.rst

@@ -643,7 +643,6 @@ Constant materialization
 .. autoinst:: iconst
 .. autoinst:: f32const
 .. autoinst:: f64const
-.. autoinst:: vconst
 
 Live range splitting
 --------------------

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.
 #

lib/cretonne/src/ir/builder.rs

@@ -6,7 +6,7 @@
 use ir::{types, instructions};
 use ir::{InstructionData, DataFlowGraph, Cursor};
 use ir::{Opcode, Type, Inst, Value, Ebb, JumpTable, SigRef, FuncRef, ValueList};
-use ir::immediates::{Imm64, Uimm8, Ieee32, Ieee64, ImmVector};
+use ir::immediates::{Imm64, Uimm8, Ieee32, Ieee64};
 use ir::condcodes::{IntCC, FloatCC};
 
 /// Base trait for instruction builders.

lib/cretonne/src/ir/immediates.rs

@@ -434,12 +434,6 @@ impl FromStr for Ieee64 {
     }
 }
 
-/// Arbitrary vector immediate.
-///
-/// This kind of immediate can represent any kind of SIMD vector constant.
-/// The representation is simply the sequence of bytes that would be used to store the vector.
-pub type ImmVector = Vec<u8>;
-
 #[cfg(test)]
 mod tests {
     use super::*;

lib/cretonne/src/ir/instructions.rs

@@ -11,7 +11,7 @@ use std::str::FromStr;
 use std::ops::{Deref, DerefMut};
 
 use ir::{Value, Type, Ebb, JumpTable, SigRef, FuncRef};
-use ir::immediates::{Imm64, Uimm8, Ieee32, Ieee64, ImmVector};
+use ir::immediates::{Imm64, Uimm8, Ieee32, Ieee64};
 use ir::condcodes::*;
 use ir::types;
 use ir::DataFlowGraph;
@@ -123,11 +123,6 @@ pub enum InstructionData {
         ty: Type,
         imm: Ieee64,
     },
-    UnaryImmVector {
-        opcode: Opcode,
-        ty: Type,
-        data: Box<UnaryImmVectorData>,
-    },
     UnarySplit {
         opcode: Opcode,
         ty: Type,
@@ -294,23 +289,6 @@ impl Default for VariableArgs {
     }
 }
 
-/// Payload data for `vconst`.
-#[derive(Clone, Debug)]
-pub struct UnaryImmVectorData {
-    /// Raw vector data.
-    pub imm: ImmVector,
-}
-
-impl Display for UnaryImmVectorData {
-    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        write!(f, "#")?;
-        for b in &self.imm {
-            write!(f, "{:02x}", b)?;
-        }
-        Ok(())
-    }
-}
-
 /// Payload data for ternary instructions with multiple results, such as `iadd_carry`.
 #[derive(Clone, Debug)]
 pub struct TernaryOverflowData {

lib/cretonne/src/write.rs

@@ -233,7 +233,6 @@ fn write_instruction(w: &mut Write,
         UnaryImm { imm, .. } => writeln!(w, " {}", imm),
         UnaryIeee32 { imm, .. } => writeln!(w, " {}", imm),
         UnaryIeee64 { imm, .. } => writeln!(w, " {}", imm),
-        UnaryImmVector { ref data, .. } => writeln!(w, " {}", data),
         UnarySplit { arg, .. } => writeln!(w, " {}", arg),
         Binary { args, .. } => writeln!(w, " {}, {}", args[0], args[1]),
         BinaryImm { arg, imm, .. } => writeln!(w, " {}, {}", arg, imm),

lib/reader/src/parser.rs

@@ -171,8 +171,7 @@ impl<'a> Context<'a> {
                     InstructionData::Nullary { .. } |
                     InstructionData::UnaryImm { .. } |
                     InstructionData::UnaryIeee32 { .. } |
-                    InstructionData::UnaryIeee64 { .. } |
-                    InstructionData::UnaryImmVector { .. } => {}
+                    InstructionData::UnaryIeee64 { .. } => {}
 
                     InstructionData::Unary { ref mut arg, .. } |
                     InstructionData::UnarySplit { ref mut arg, .. } |
@@ -1335,9 +1334,6 @@ impl<'a> Parser<'a> {
                     imm: self.match_ieee64("expected immediate 64-bit float operand")?,
                 }
             }
-            InstructionFormat::UnaryImmVector => {
-                unimplemented!();
-            }
             InstructionFormat::UnarySplit => {
                 InstructionData::UnarySplit {
                     opcode: opcode,