| Issue |
171175
|
| Summary |
[SPIRV] Add legalization for single element vectors
|
| Labels |
backend:SPIR-V
|
| Assignees |
s-perron
|
| Reporter |
s-perron
|
SPIR-V does not allow vectors with just a single element. If the llvm-ir has such vectors, they need to be scalarized.
Some HLSL examples that generate small vectors are:
https://godbolt.org/z/1nx3ndGY3
```
struct T {
int a;
};
[[vk::binding(10)]] const T t;
RWStructuredBuffer<int1x1> a;
[numthreads(1,1,1)]
void main() {
a[0] = a[1] * t.a;
}
```
and https://godbolt.org/z/WThhWoo97
```
struct T {
int a;
};
[[vk::binding(10)]] const T t;
RWStructuredBuffer<int1> a;
[numthreads(1,1,1)]
void main() {
a[0] = a[1] * t.a;
}
```
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