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Generate basic blocks for wasm if..then..else.

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This commit is contained in:
Sean Stangl
2019-07-24 13:46:24 -06:00
parent b7a9d65458
commit be36cc6538
1 changed files with 9 additions and 0 deletions
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9
cranelift/wasm/src/code_translator.rs
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@@ -152,6 +152,15 @@ pub fn translate_operator<FE: FuncEnvironment + ?Sized>(
let val = state.pop1(); let val = state.pop1();
let if_not = builder.create_ebb(); let if_not = builder.create_ebb();
let jump_inst = builder.ins().brz(val, if_not, &[]); let jump_inst = builder.ins().brz(val, if_not, &[]);
#[cfg(feature = "basic-blocks")]
{
let next_ebb = builder.create_ebb();
builder.ins().jump(next_ebb, &[]);
builder.seal_block(next_ebb); // Only predecessor is the current block.
builder.switch_to_block(next_ebb);
}
// Here we append an argument to an Ebb targeted by an argumentless jump instruction // Here we append an argument to an Ebb targeted by an argumentless jump instruction
// But in fact there are two cases: // But in fact there are two cases:
// - either the If does not have a Else clause, in that case ty = EmptyBlock // - either the If does not have a Else clause, in that case ty = EmptyBlock