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allow HSlice bounded by constants of distinct types (#19219) [backport:1.2]

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When creating heterogenous slices of distinct types, the compiler does
not initialize the internal type's `size` before accessing it.
This then leads to this crash message:
```
compiler/int128.nim(594, 11) `false` masking only implemented for 1, 2, 4 and 8 bytes [AssertionError]
```
This patch initializes the `size` properly, fixing the problem.

(cherry picked from commit 0213c7313b)
This commit is contained in:
Etan Kissling
2021-12-06 20:38:23 +01:00
committed by narimiran
parent 84c1b1af0e
commit 4cb522fb8a
2 changed files with 10 additions and 8 deletions
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16
compiler/semfold.nim
View File

@@ -164,7 +164,7 @@ proc evalOp(m: TMagic, n, a, b, c: PNode; g: ModuleGraph): PNode =
of mCard: result = newIntNodeT(toInt128(nimsets.cardSet(g.config, a)), n, g)
of mBitnotI:
if n.typ.isUnsigned:
result = newIntNodeT(bitnot(getInt(a)).maskBytes(int(n.typ.size)), n, g)
result = newIntNodeT(bitnot(getInt(a)).maskBytes(int(getSize(g.config, n.typ))), n, g)
else:
result = newIntNodeT(bitnot(getInt(a)), n, g)
of mLengthArray: result = newIntNodeT(lengthOrd(g.config, a.typ), n, g)
@@ -276,23 +276,23 @@ proc evalOp(m: TMagic, n, a, b, c: PNode; g: ModuleGraph): PNode =
of mBitorI, mOr: result = newIntNodeT(bitor(getInt(a), getInt(b)), n, g)
of mBitxorI, mXor: result = newIntNodeT(bitxor(getInt(a), getInt(b)), n, g)
of mAddU:
let val = maskBytes(getInt(a) + getInt(b), int(n.typ.size))
let val = maskBytes(getInt(a) + getInt(b), int(getSize(g.config, n.typ)))
result = newIntNodeT(val, n, g)
of mSubU:
let val = maskBytes(getInt(a) - getInt(b), int(n.typ.size))
let val = maskBytes(getInt(a) - getInt(b), int(getSize(g.config, n.typ)))
result = newIntNodeT(val, n, g)
# echo "subU: ", val, " n: ", n, " result: ", val
of mMulU:
let val = maskBytes(getInt(a) * getInt(b), int(n.typ.size))
let val = maskBytes(getInt(a) * getInt(b), int(getSize(g.config, n.typ)))
result = newIntNodeT(val, n, g)
of mModU:
let argA = maskBytes(getInt(a), int(a.typ.size))
let argB = maskBytes(getInt(b), int(a.typ.size))
let argA = maskBytes(getInt(a), int(getSize(g.config, a.typ)))
let argB = maskBytes(getInt(b), int(getSize(g.config, a.typ)))
if argB != Zero:
result = newIntNodeT(argA mod argB, n, g)
of mDivU:
let argA = maskBytes(getInt(a), int(a.typ.size))
let argB = maskBytes(getInt(b), int(a.typ.size))
let argA = maskBytes(getInt(a), int(getSize(g.config, a.typ)))
let argB = maskBytes(getInt(b), int(getSize(g.config, a.typ)))
if argB != Zero:
result = newIntNodeT(argA div argB, n, g)
of mLeSet: result = newIntNodeT(toInt128(ord(containsSets(g.config, a, b))), n, g)

2
tests/slice/tdistinct.nim Normal file
View File

@@ -0,0 +1,2 @@
type Foo = distinct uint64
const slice = 0 ..< 42.Foo