diff --git a/cranelift/codegen/meta/src/cdsl/ast.rs b/cranelift/codegen/meta/src/cdsl/ast.rs
index 5e1c192f0f..141ffd84c2 100644
--- a/cranelift/codegen/meta/src/cdsl/ast.rs
+++ b/cranelift/codegen/meta/src/cdsl/ast.rs
@@ -11,7 +11,6 @@ use std::fmt;
 pub enum Expr {
     Var(VarIndex),
     Literal(Literal),
-    Apply(Apply),
 }
 
 impl Expr {
@@ -39,7 +38,6 @@ impl Expr {
         match self {
             Expr::Var(var_index) => var_pool.get(*var_index).to_rust_code(),
             Expr::Literal(literal) => literal.to_rust_code(),
-            Expr::Apply(a) => a.to_rust_code(var_pool),
         }
     }
 }
@@ -81,9 +79,6 @@ impl DefPool {
     pub fn get(&self, index: DefIndex) -> &Def {
         self.pool.get(index).unwrap()
     }
-    pub fn get_mut(&mut self, index: DefIndex) -> &mut Def {
-        self.pool.get_mut(index).unwrap()
-    }
     pub fn next_index(&self) -> DefIndex {
         self.pool.next_key()
     }
@@ -430,16 +425,6 @@ impl Apply {
         format!("{}({})", inst_name, args)
     }
 
-    fn to_rust_code(&self, var_pool: &VarPool) -> String {
-        let args = self
-            .args
-            .iter()
-            .map(|arg| arg.to_rust_code(var_pool))
-            .collect::<Vec<_>>()
-            .join(", ");
-        format!("{}({})", self.inst.name, args)
-    }
-
     pub fn inst_predicate(
         &self,
         format_registry: &FormatRegistry,
diff --git a/cranelift/codegen/meta/src/cdsl/instructions.rs b/cranelift/codegen/meta/src/cdsl/instructions.rs
index da59beb2b0..1689f2a5c0 100644
--- a/cranelift/codegen/meta/src/cdsl/instructions.rs
+++ b/cranelift/codegen/meta/src/cdsl/instructions.rs
@@ -4,7 +4,6 @@ use std::collections::HashMap;
 use std::fmt;
 use std::ops;
 use std::rc::Rc;
-use std::slice;
 
 use crate::cdsl::camel_case;
 use crate::cdsl::formats::{
@@ -72,10 +71,6 @@ pub struct InstructionGroup {
 }
 
 impl InstructionGroup {
-    pub fn iter(&self) -> slice::Iter<Instruction> {
-        self.instructions.iter()
-    }
-
     pub fn by_name(&self, name: &'static str) -> &Instruction {
         self.instructions
             .iter()
diff --git a/cranelift/codegen/meta/src/cdsl/xform.rs b/cranelift/codegen/meta/src/cdsl/xform.rs
index e988bf12ac..b1a0234cd4 100644
--- a/cranelift/codegen/meta/src/cdsl/xform.rs
+++ b/cranelift/codegen/meta/src/cdsl/xform.rs
@@ -384,9 +384,6 @@ impl TransformGroups {
     pub fn get(&self, id: TransformGroupIndex) -> &TransformGroup {
         &self.groups[id]
     }
-    pub fn get_mut(&mut self, id: TransformGroupIndex) -> &mut TransformGroup {
-        self.groups.get_mut(id).unwrap()
-    }
     fn next_key(&self) -> TransformGroupIndex {
         self.groups.next_key()
     }
diff --git a/cranelift/codegen/meta/src/gen_encodings.rs b/cranelift/codegen/meta/src/gen_encodings.rs
index 71fcf17002..cfaa63f087 100644
--- a/cranelift/codegen/meta/src/gen_encodings.rs
+++ b/cranelift/codegen/meta/src/gen_encodings.rs
@@ -1126,7 +1126,7 @@ fn gen_isa(defs: &SharedDefinitions, isa: &TargetIsa, fmt: &mut Formatter) {
     fmt.line("};");
 }
 
-pub fn generate(
+pub(crate) fn generate(
     defs: &SharedDefinitions,
     isa: &TargetIsa,
     filename: &str,
diff --git a/cranelift/codegen/meta/src/gen_inst.rs b/cranelift/codegen/meta/src/gen_inst.rs
index 5dbb9dc095..7d8353dad3 100644
--- a/cranelift/codegen/meta/src/gen_inst.rs
+++ b/cranelift/codegen/meta/src/gen_inst.rs
@@ -1059,7 +1059,7 @@ fn gen_builder(instructions: &AllInstructions, formats: &FormatRegistry, fmt: &m
     fmt.line("}");
 }
 
-pub fn generate(
+pub(crate) fn generate(
     shared_defs: &SharedDefinitions,
     opcode_filename: &str,
     inst_builder_filename: &str,
diff --git a/cranelift/codegen/meta/src/isa/arm32/mod.rs b/cranelift/codegen/meta/src/isa/arm32/mod.rs
index d143a15163..fb41db2530 100644
--- a/cranelift/codegen/meta/src/isa/arm32/mod.rs
+++ b/cranelift/codegen/meta/src/isa/arm32/mod.rs
@@ -49,7 +49,7 @@ fn define_regs() -> IsaRegs {
     regs.build()
 }
 
-pub fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
+pub(crate) fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
     let settings = define_settings(&shared_defs.settings);
     let regs = define_regs();
 
diff --git a/cranelift/codegen/meta/src/isa/arm64/mod.rs b/cranelift/codegen/meta/src/isa/arm64/mod.rs
index 195fc80ae6..697e9513c5 100644
--- a/cranelift/codegen/meta/src/isa/arm64/mod.rs
+++ b/cranelift/codegen/meta/src/isa/arm64/mod.rs
@@ -45,7 +45,7 @@ fn define_registers() -> IsaRegs {
     regs.build()
 }
 
-pub fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
+pub(crate) fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
     let settings = define_settings(&shared_defs.settings);
     let regs = define_registers();
 
diff --git a/cranelift/codegen/meta/src/isa/mod.rs b/cranelift/codegen/meta/src/isa/mod.rs
index 0c2bb5eed0..6c5ba13888 100644
--- a/cranelift/codegen/meta/src/isa/mod.rs
+++ b/cranelift/codegen/meta/src/isa/mod.rs
@@ -55,7 +55,7 @@ impl fmt::Display for Isa {
     }
 }
 
-pub fn define(isas: &Vec<Isa>, shared_defs: &mut SharedDefinitions) -> Vec<TargetIsa> {
+pub(crate) fn define(isas: &Vec<Isa>, shared_defs: &mut SharedDefinitions) -> Vec<TargetIsa> {
     isas.iter()
         .map(|isa| match isa {
             Isa::Riscv => riscv::define(shared_defs),
diff --git a/cranelift/codegen/meta/src/isa/riscv/encodings.rs b/cranelift/codegen/meta/src/isa/riscv/encodings.rs
index af5e471a53..02a3bc7b61 100644
--- a/cranelift/codegen/meta/src/isa/riscv/encodings.rs
+++ b/cranelift/codegen/meta/src/isa/riscv/encodings.rs
@@ -101,7 +101,7 @@ fn lui_bits() -> u16 {
     0b01101
 }
 
-pub fn define<'defs>(
+pub(crate) fn define<'defs>(
     shared_defs: &'defs SharedDefinitions,
     isa_settings: &SettingGroup,
     recipes: &'defs RecipeGroup,
diff --git a/cranelift/codegen/meta/src/isa/riscv/mod.rs b/cranelift/codegen/meta/src/isa/riscv/mod.rs
index 435b38eb34..a2683b5a8b 100644
--- a/cranelift/codegen/meta/src/isa/riscv/mod.rs
+++ b/cranelift/codegen/meta/src/isa/riscv/mod.rs
@@ -85,7 +85,7 @@ fn define_registers() -> IsaRegs {
     regs.build()
 }
 
-pub fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
+pub(crate) fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
     let settings = define_settings(&shared_defs.settings);
     let regs = define_registers();
 
diff --git a/cranelift/codegen/meta/src/isa/riscv/recipes.rs b/cranelift/codegen/meta/src/isa/riscv/recipes.rs
index 40396b4ab3..f32bbd568c 100644
--- a/cranelift/codegen/meta/src/isa/riscv/recipes.rs
+++ b/cranelift/codegen/meta/src/isa/riscv/recipes.rs
@@ -50,7 +50,7 @@ impl<'formats> RecipeGroup<'formats> {
     }
 }
 
-pub fn define<'formats>(
+pub(crate) fn define<'formats>(
     shared_defs: &'formats SharedDefinitions,
     regs: &IsaRegs,
 ) -> RecipeGroup<'formats> {
diff --git a/cranelift/codegen/meta/src/isa/x86/encodings.rs b/cranelift/codegen/meta/src/isa/x86/encodings.rs
index 072cbb1b2a..ecdff33740 100644
--- a/cranelift/codegen/meta/src/isa/x86/encodings.rs
+++ b/cranelift/codegen/meta/src/isa/x86/encodings.rs
@@ -318,7 +318,7 @@ impl PerCpuModeEncodings {
 
 // Definitions.
 
-pub fn define(
+pub(crate) fn define(
     shared_defs: &SharedDefinitions,
     settings: &SettingGroup,
     x86: &InstructionGroup,
diff --git a/cranelift/codegen/meta/src/isa/x86/instructions.rs b/cranelift/codegen/meta/src/isa/x86/instructions.rs
index 742b632642..03730cdeac 100644
--- a/cranelift/codegen/meta/src/isa/x86/instructions.rs
+++ b/cranelift/codegen/meta/src/isa/x86/instructions.rs
@@ -10,7 +10,7 @@ use crate::cdsl::typevar::{Interval, TypeSetBuilder, TypeVar};
 use crate::shared::immediates::Immediates;
 use crate::shared::types;
 
-pub fn define(
+pub(crate) fn define(
     mut all_instructions: &mut AllInstructions,
     format_registry: &FormatRegistry,
     immediates: &Immediates,
diff --git a/cranelift/codegen/meta/src/isa/x86/legalize.rs b/cranelift/codegen/meta/src/isa/x86/legalize.rs
index 158b05e4f1..2fd160de3a 100644
--- a/cranelift/codegen/meta/src/isa/x86/legalize.rs
+++ b/cranelift/codegen/meta/src/isa/x86/legalize.rs
@@ -6,7 +6,7 @@ use crate::shared::types::Float::F64;
 use crate::shared::types::Int::{I32, I64};
 use crate::shared::Definitions as SharedDefinitions;
 
-pub fn define(shared: &mut SharedDefinitions, x86_instructions: &InstructionGroup) {
+pub(crate) fn define(shared: &mut SharedDefinitions, x86_instructions: &InstructionGroup) {
     let mut group = TransformGroupBuilder::new(
         "x86_expand",
         r#"
diff --git a/cranelift/codegen/meta/src/isa/x86/mod.rs b/cranelift/codegen/meta/src/isa/x86/mod.rs
index 5122c7b2ad..10baf256a9 100644
--- a/cranelift/codegen/meta/src/isa/x86/mod.rs
+++ b/cranelift/codegen/meta/src/isa/x86/mod.rs
@@ -13,7 +13,7 @@ mod recipes;
 mod registers;
 mod settings;
 
-pub fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
+pub(crate) fn define(shared_defs: &mut SharedDefinitions) -> TargetIsa {
     let settings = settings::define(&shared_defs.settings);
     let regs = registers::define();
 
diff --git a/cranelift/codegen/meta/src/isa/x86/recipes.rs b/cranelift/codegen/meta/src/isa/x86/recipes.rs
index 8eb0fdac6d..6a369f34c6 100644
--- a/cranelift/codegen/meta/src/isa/x86/recipes.rs
+++ b/cranelift/codegen/meta/src/isa/x86/recipes.rs
@@ -325,7 +325,7 @@ fn valid_scale(format: &InstructionFormat) -> InstructionPredicate {
         })
 }
 
-pub fn define<'shared>(
+pub(crate) fn define<'shared>(
     shared_defs: &'shared SharedDefinitions,
     settings: &'shared SettingGroup,
     regs: &'shared IsaRegs,
diff --git a/cranelift/codegen/meta/src/shared/formats.rs b/cranelift/codegen/meta/src/shared/formats.rs
index d631f337c2..5309afc1b0 100644
--- a/cranelift/codegen/meta/src/shared/formats.rs
+++ b/cranelift/codegen/meta/src/shared/formats.rs
@@ -1,7 +1,7 @@
 use crate::cdsl::formats::{FormatRegistry, InstructionFormatBuilder as Builder};
 use crate::shared::{entities::EntityRefs, immediates::Immediates};
 
-pub fn define(imm: &Immediates, entities: &EntityRefs) -> FormatRegistry {
+pub(crate) fn define(imm: &Immediates, entities: &EntityRefs) -> FormatRegistry {
     let mut registry = FormatRegistry::new();
 
     registry.insert(Builder::new("Unary").value());
diff --git a/cranelift/codegen/meta/src/shared/immediates.rs b/cranelift/codegen/meta/src/shared/immediates.rs
index b7a7f712a2..30c1a73970 100644
--- a/cranelift/codegen/meta/src/shared/immediates.rs
+++ b/cranelift/codegen/meta/src/shared/immediates.rs
@@ -2,7 +2,7 @@ use crate::cdsl::operands::{OperandKind, OperandKindBuilder as Builder};
 
 use std::collections::HashMap;
 
-pub struct Immediates {
+pub(crate) struct Immediates {
     /// A 64-bit immediate integer operand.
     ///
     /// This type of immediate integer can interact with SSA values with any IntType type.
diff --git a/cranelift/codegen/meta/src/shared/instructions.rs b/cranelift/codegen/meta/src/shared/instructions.rs
index 9499bf190a..f636141a37 100644
--- a/cranelift/codegen/meta/src/shared/instructions.rs
+++ b/cranelift/codegen/meta/src/shared/instructions.rs
@@ -11,7 +11,7 @@ use crate::cdsl::typevar::{Interval, TypeSetBuilder, TypeVar};
 use crate::shared::types;
 use crate::shared::{entities::EntityRefs, immediates::Immediates};
 
-pub fn define(
+pub(crate) fn define(
     all_instructions: &mut AllInstructions,
     format_registry: &FormatRegistry,
     imm: &Immediates,
diff --git a/cranelift/codegen/meta/src/shared/legalize.rs b/cranelift/codegen/meta/src/shared/legalize.rs
index ce2faa7720..90fe47d0fd 100644
--- a/cranelift/codegen/meta/src/shared/legalize.rs
+++ b/cranelift/codegen/meta/src/shared/legalize.rs
@@ -6,7 +6,7 @@ use crate::shared::immediates::Immediates;
 use crate::shared::types::Float::{F32, F64};
 use crate::shared::types::Int::{I16, I32, I64, I8};
 
-pub fn define(insts: &InstructionGroup, imm: &Immediates) -> TransformGroups {
+pub(crate) fn define(insts: &InstructionGroup, imm: &Immediates) -> TransformGroups {
     let mut narrow = TransformGroupBuilder::new(
         "narrow",
         r#"
diff --git a/cranelift/codegen/meta/src/shared/mod.rs b/cranelift/codegen/meta/src/shared/mod.rs
index 29c74caa06..12921da5ef 100644
--- a/cranelift/codegen/meta/src/shared/mod.rs
+++ b/cranelift/codegen/meta/src/shared/mod.rs
@@ -16,7 +16,7 @@ use crate::cdsl::xform::TransformGroups;
 use crate::shared::entities::EntityRefs;
 use crate::shared::immediates::Immediates;
 
-pub struct Definitions {
+pub(crate) struct Definitions {
     pub settings: SettingGroup,
     pub all_instructions: AllInstructions,
     pub instructions: InstructionGroup,
@@ -25,7 +25,7 @@ pub struct Definitions {
     pub transform_groups: TransformGroups,
 }
 
-pub fn define() -> Definitions {
+pub(crate) fn define() -> Definitions {
     let mut all_instructions = AllInstructions::new();
 
     let immediates = Immediates::new();