| Issue |
172690
|
| Summary |
TableGen crashes in GlobalISelEmitter when reg_sequence attempts to use an illegal subregister index for class
|
| Labels |
tablegen,
crash-on-invalid,
llvm:globalisel
|
| Assignees |
|
| Reporter |
arsenm
|
Attempting to add this pattern to SIInstructions.td crashes tablegen. VGPR_32 doesn't support sub0; this was meant to be lo16
```
def : GCNPat <
(fcopysign (f32 fpimm_pos_zero), fp16vt:$src1),
(REG_SEQUENCE VGPR_32,
(V_MOV_B16_t16_e64 0, (i16 0), 0), sub0,
(V_AND_B16_t16_e64 0, (S_MOV_B32 (i32 0x00008000)), 0, VGPR_16:$src1), hi16)
>;
```
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