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cranelift-wasm: Jump to the destination block at end of consequent

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This commit fixes a bug where at the end of an `if..else..end`'s consequent
block, we would sometimes erroneously jump to the `else` block instead of to the
following destination block. Not good!
This commit is contained in:
Nick Fitzgerald
2019-10-02 16:28:46 -07:00
committed by Dan Gohman
parent b3cf7f911b
commit 913d26841a
2 changed files with 11 additions and 1 deletions
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3
cranelift/wasm/src/code_translator.rs
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@@ -203,6 +203,7 @@ pub fn translate_operator<FE: FuncEnvironment + ?Sized>(
else_data: ElseData::NoElse { branch_inst },
ref mut reachable_from_top,
blocktype,
destination,
..
} => {
// We take the control frame pushed by the if, use its ebb
@@ -215,7 +216,7 @@ pub fn translate_operator<FE: FuncEnvironment + ?Sized>(
let (params, _results) = blocktype_params_results(wasm_types, blocktype)?;
let else_ebb = ebb_with_params(builder, params)?;
builder.ins().jump(else_ebb, state.peekn(params.len()));
builder.ins().jump(destination, state.peekn(params.len()));
state.popn(params.len());
// You might be expecting that we push the parameters for this