[PATCH] D49836: AMDGPU: Remove broken ternary i16 patterns

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added inline comments.


================
Comment at: lib/Target/AMDGPU/VOP3Instructions.td:469-474
-def : GCNPat<
-  (i64 (op3 (op2 (op1 i16:$src0, i16:$src1), i16:$src2))),
-   (REG_SEQUENCE VReg_64,
-     (inst i16:$src0, i16:$src1, i16:$src2, (i1 0)), sub0,
-     (V_MOV_B32_e32 (i32 0)), sub1)
->;
----------------
These can be fixed, they don't need to be dropped.

It's also more complicated because since gfx9 there is a control bit for whether the high 16-bits are zeroed or preserved which we haven't implemented


Repository:
  rL LLVM

https://reviews.llvm.org/D49836