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Rework the API for outgoing blockparams

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Amanieu d'Antras
2021-11-30 02:22:15 +00:00
parent fdd9913a7a
commit 0cb3a8019f
5 changed files with 65 additions and 52 deletions
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17
src/lib.rs
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@@ -860,21 +860,14 @@ pub trait Function {
fn is_ret(&self, insn: Inst) -> bool;
/// Determine whether an instruction is the end-of-block
/// branch. If so, its operands at the indices given by
/// `branch_blockparam_arg_offset()` below *must* be the block
/// parameters for each of its block's `block_succs` successor
/// blocks, in order.
/// branch.
fn is_branch(&self, insn: Inst) -> bool;
/// If `insn` is a branch at the end of `block`, returns the
/// operand index at which outgoing blockparam arguments are
/// found. Starting at this index, blockparam arguments for each
/// successor block's blockparams, in order, must be found.
///
/// It is an error if `self.inst_operands(insn).len() -
/// self.branch_blockparam_arg_offset(insn)` is not exactly equal
/// to the sum of blockparam counts for all successor blocks.
fn branch_blockparam_arg_offset(&self, block: Block, insn: Inst) -> usize;
/// outgoing blockparam arguments for the given successor. The
/// number of arguments must match the number incoming blockparams
/// for each respective successor block.
fn branch_blockparams(&self, block: Block, insn: Inst, succ_idx: usize) -> &[VReg];
/// Determine whether an instruction requires all reference-typed
/// values to be placed onto the stack. For these instructions,