[wasm][coreclr] global::StructPacking.TestEntryPoint fails

[radekdoulik]

14:11:04.798 Running test: global::StructPacking.TestEntryPoint()
Unexpected Size for DefaultLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].
Expected: 32; Actual: 24
Unexpected Offset for DefaultLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].Value.
Expected: 16; Actual: 8

Unexpected Size for SequentialLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].
Expected: 32; Actual: 24
Unexpected Offset for SequentialLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].Value.
Expected: 16; Actual: 8

Unexpected Size for SequentialLayoutMaxPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].
Expected: 32; Actual: 24
Unexpected Offset for SequentialLayoutMaxPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].Value.
Expected: 16; Actual: 8

Unexpected Size for AutoLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].
Expected: 32; Actual: 24
Unexpected Offset for AutoLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].Value.
Expected: 16; Actual: 8

Unexpected Size for AutoLayoutMinPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].
Expected: 32; Actual: 24
Unexpected Offset for AutoLayoutMinPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].Value.
Expected: 16; Actual: 8

Unexpected Size for AutoLayoutMaxPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].
Expected: 32; Actual: 24
Unexpected Offset for AutoLayoutMaxPacking1[System.Runtime.Intrinsics.Vector1281[System.Byte]].Value.
Expected: 16; Actual: 8

Unexpected Size for DefaultLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].
Expected: 64; Actual: 40
Unexpected Offset for DefaultLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].Value.
Expected: 32; Actual: 8

Unexpected Size for SequentialLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].
Expected: 64; Actual: 40
Unexpected Offset for SequentialLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].Value.
Expected: 32; Actual: 8

Unexpected Size for SequentialLayoutMaxPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].
Expected: 64; Actual: 40
Unexpected Offset for SequentialLayoutMaxPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].Value.
Expected: 32; Actual: 8

Unexpected Size for AutoLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].
Expected: 64; Actual: 40
Unexpected Offset for AutoLayoutDefaultPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].Value.
Expected: 32; Actual: 8

Unexpected Size for AutoLayoutMinPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].
Expected: 64; Actual: 40
Unexpected Offset for AutoLayoutMinPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].Value.
Expected: 32; Actual: 8

Unexpected Size for AutoLayoutMaxPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].
Expected: 64; Actual: 40
Unexpected Offset for AutoLayoutMaxPacking1[System.Runtime.Intrinsics.Vector2561[System.Byte]].Value.
Expected: 32; Actual: 8

Xunit.Sdk.EqualException: Assert.Equal() Failure: Values differ
Expected: 100
Actual: 0
at Xunit.Assert.Equal[T](T expected, T actual, IEqualityComparer`1 comparer)
at Xunit.Assert.Equal[T](T expected, T actual)
at Program.<>c__DisplayClass0_0.<

$>g__TestExecutor2|3(TestFilter filter, StreamWriter tempLogSw, StreamWriter statsCsvSw)
14:11:05.440 Failed test: global::StructPacking.TestEntryPoint()

[radekdoulik]

Looks like we indeed calculate the layout of structs with vectors wrong in vm on wasm.

The C struct of { uint8_t, v128_t } has indeed size 32 bytes and the vector has offset 16 on wasm32.