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Merge raw_bitcast and bitcast (#5175)

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- Allow bitcast for vectors with differing lane widths
- Remove raw_bitcast IR instruction
- Change all users of raw_bitcast to bitcast
- Implement support for no-op bitcast cases across backends

This implements the second step of the plan outlined here:
https://github.com/bytecodealliance/wasmtime/issues/4566#issuecomment-1234819394
This commit is contained in:
Ulrich Weigand
2022-11-02 18:16:27 +01:00
committed by GitHub
parent e0c8a7f477
commit 961107ec63
26 changed files with 95 additions and 130 deletions
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8
cranelift/codegen/src/nan_canonicalization.rs
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@@ -70,11 +70,11 @@ fn add_nan_canon_seq(pos: &mut FuncCursor, inst: Inst) {
.select(is_nan, canon_nan, new_res);
};
let vector_select = |pos: &mut FuncCursor, canon_nan: Value| {
let cond = pos.ins().raw_bitcast(types::I8X16, is_nan);
let canon_nan = pos.ins().raw_bitcast(types::I8X16, canon_nan);
let result = pos.ins().raw_bitcast(types::I8X16, new_res);
let cond = pos.ins().bitcast(types::I8X16, is_nan);
let canon_nan = pos.ins().bitcast(types::I8X16, canon_nan);
let result = pos.ins().bitcast(types::I8X16, new_res);
let bitmask = pos.ins().bitselect(cond, canon_nan, result);
pos.ins().with_result(val).raw_bitcast(val_type, bitmask);
pos.ins().with_result(val).bitcast(val_type, bitmask);
};
match val_type {