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Implement jump tables (#453)

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* Add 'jump_table_entry' and 'indirect_jump' instructions.

* Update CodeSink to keep track of code size. Pretty up clif-util's disassembly output.

* Only disassemble the machine portion of output. Pretty print the read-only data after it.

* Update switch frontend code to use new br_table instruction w/ default.
This commit is contained in:
Tyler McMullen
2018-10-03 11:04:21 -06:00
committed by Dan Gohman
parent de1d82b4ba
commit 79cea5e18b
39 changed files with 627 additions and 100 deletions
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7
lib/codegen/src/verifier/flags.rs
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@@ -135,7 +135,12 @@ impl<'a> FlagsVerifier<'a> {
merge(&mut live_val, val, inst, errors)?;
}
}
BranchInfo::Table(jt) => {
BranchInfo::Table(jt, dest) => {
if let Some(dest) = dest {
if let Some(val) = self.livein[dest].expand() {
merge(&mut live_val, val, inst, errors)?;
}
}
for (_, dest) in self.func.jump_tables[jt].entries() {
if let Some(val) = self.livein[dest].expand() {
merge(&mut live_val, val, inst, errors)?;