[meta] Morph a few pub into pub(crate), and remove dead code;

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,

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,

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#"

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();
 

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,