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Migrate cranelift-wasm to brif (#5638)

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Incrementally working towards removing brz and brnz completely.
This commit is contained in:
Trevor Elliott
2023-01-27 10:34:41 -08:00
committed by GitHub
parent 915801551b
commit 058d93bc64
3 changed files with 76 additions and 42 deletions
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14
cranelift/frontend/src/frontend.rs
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@@ -680,14 +680,14 @@ impl<'a> FunctionBuilder<'a> {
///
/// **Note:** You are responsible for maintaining the coherence with the arguments of
/// other jump instructions.
pub fn change_jump_destination(&mut self, inst: Inst, new_dest: Block) {
pub fn change_jump_destination(&mut self, inst: Inst, old_block: Block, new_block: Block) {
let dfg = &mut self.func.dfg;
for old_dest in dfg.insts[inst].branch_destination_mut() {
self.func_ctx
.ssa
.remove_block_predecessor(old_dest.block(&dfg.value_lists), inst);
old_dest.set_block(new_dest, &mut dfg.value_lists);
self.func_ctx.ssa.declare_block_predecessor(new_dest, inst);
for block in dfg.insts[inst].branch_destination_mut() {
if block.block(&dfg.value_lists) == old_block {
self.func_ctx.ssa.remove_block_predecessor(old_block, inst);
block.set_block(new_block, &mut dfg.value_lists);
self.func_ctx.ssa.declare_block_predecessor(new_block, inst);
}
}
}