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cranelift: Exclude the control type in narrower and wider (#6018)

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* Don't include the control type in `narrower` or `wider` constraints

* Add verifier tests for instructions that use narrower and wider
This commit is contained in:
Trevor Elliott
2023-03-14 11:09:15 -07:00
committed by GitHub
parent f5ad74e546
commit e4d9bb7c5a
2 changed files with 19 additions and 13 deletions
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26
cranelift/codegen/src/ir/instructions.rs
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@@ -777,13 +777,13 @@ impl OperandConstraint {
tys.lanes = BitSet::from_range(0, 1);
if ctrl_type.is_int() {
// The upper bound in from_range is exclusive, so add one here get the closed
// interval of [I8, ctrl_type].
tys.ints = BitSet::from_range(3, ctrl_type_bits as u8 + 1);
// The upper bound in from_range is exclusive, and we want to exclude the
// control type to construct the interval of [I8, ctrl_type).
tys.ints = BitSet::from_range(3, ctrl_type_bits as u8);
} else if ctrl_type.is_float() {
// The upper bound in from_range is exclusive, so add one here get the closed
// interval of [F32, ctrl_type].
tys.floats = BitSet::from_range(5, ctrl_type_bits as u8 + 1);
// The upper bound in from_range is exclusive, and we want to exclude the
// control type to construct the interval of [F32, ctrl_type).
tys.floats = BitSet::from_range(5, ctrl_type_bits as u8);
} else {
panic!("The Narrower constraint only operates on floats or ints");
}
@@ -797,13 +797,15 @@ impl OperandConstraint {
tys.lanes = BitSet::from_range(0, 1);
if ctrl_type.is_int() {
// The upper bound should include all types wider than `ctrl_type`, so we use
// `2^8` as the upper bound to define the closed range `[ctrl_type, I128]`.
tys.ints = BitSet::from_range(ctrl_type_bits as u8, 8);
// The interval should include all types wider than `ctrl_type`, so we use
// `2^8` as the upper bound, and add one to the bits of `ctrl_type` to define
// the interval `(ctrl_type, I128]`.
tys.ints = BitSet::from_range(ctrl_type_bits as u8 + 1, 8);
} else if ctrl_type.is_float() {
// The upper bound should include all float types wider than `ctrl_type`, so we
// use `2^7` as the upper bound to define the closed range `[ctrl_type, F64]`.
tys.floats = BitSet::from_range(ctrl_type_bits as u8, 7);
// The interval should include all float types wider than `ctrl_type`, so we
// use `2^7` as the upper bound, and add one to the bits of `ctrl_type` to
// define the interval `(ctrl_type, F64]`.
tys.floats = BitSet::from_range(ctrl_type_bits as u8 + 1, 7);
} else {
panic!("The Wider constraint only operates on floats or ints");
}