| Issue |
87194
|
| Summary |
Combiner dags/patterns.
|
| Labels |
llvm:globalisel
|
| Assignees |
|
| Reporter |
tschuett
|
I have issues with opcodes that a variable number of operands:
```
def G_BUILD_VECTOR : GenericInstruction {
let OutOperandList = (outs type0:$dst);
let InOperandList = (ins type1:$src0, variable_ops);
let hasSideEffects = false;
let variadicOpsType = type1;
}
```
For build vector the number of sources is variable.
I tried in the combiner:
```
def extract_vector_element_build_vector : GICombineRule<
(defs root:$root, build_fn_matchinfo:$matchinfo),
(match (G_BUILD_VECTOR $src, $x),
(G_EXTRACT_VECTOR_ELT $root, $src, $idx),
[{ return Helper.matchExtractVectorElementWithBuildVector(${root}, ${matchinfo}); }]),
(apply [{ Helper.applyBuildFnMO(${root}, ${matchinfo}); }])>;
```
but it fails when there are two operands.
I could copy-paste up to 8 or 16 operands, but ....
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