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Add a wasmtime settings command to print Cranelift settings.

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This commit adds the `wasmtime settings` command to print out available
Cranelift settings for a target (defaults to the host).

The compile command has been updated to remove the Cranelift ISA options in
favor of encouraging users to use `wasmtime settings` to discover what settings
are available.  This will reduce the maintenance cost for syncing the compile
command with Cranelift ISA flags.
This commit is contained in:
Peter Huene
2021-03-31 22:44:13 -07:00
parent a474524d3b
commit abf3bf29f9
16 changed files with 478 additions and 312 deletions
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4
cranelift/codegen/meta/src/gen_settings.rs
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@@ -202,7 +202,7 @@ fn gen_enum_types(group: &SettingGroup, fmt: &mut Formatter) {
/// Emit a getter function for `setting`.
fn gen_getter(setting: &Setting, fmt: &mut Formatter) {
fmt.doc_comment(setting.comment);
fmt.doc_comment(format!("{}\n{}", setting.description, setting.comment));
match setting.specific {
SpecificSetting::Bool(BoolSetting {
predicate_number, ..
@@ -320,6 +320,7 @@ fn gen_descriptors(group: &SettingGroup, fmt: &mut Formatter) {
fmtln!(fmt, "detail::Descriptor {");
fmt.indent(|fmt| {
fmtln!(fmt, "name: \"{}\",", setting.name);
fmtln!(fmt, "description: \"{}\",", setting.description);
fmtln!(fmt, "offset: {},", setting.byte_offset);
match setting.specific {
SpecificSetting::Bool(BoolSetting { bit_offset, .. }) => {
@@ -352,6 +353,7 @@ fn gen_descriptors(group: &SettingGroup, fmt: &mut Formatter) {
fmtln!(fmt, "detail::Descriptor {");
fmt.indent(|fmt| {
fmtln!(fmt, "name: \"{}\",", preset.name);
fmtln!(fmt, "description: \"{}\",", preset.description);
fmtln!(fmt, "offset: {},", (idx as u8) * group.settings_size);
fmtln!(fmt, "detail: detail::Detail::Preset,");
});