[clang] [llvm] [mlir] [AMDGPU] Disable neg_lo[0:1] and neg_hi[0:1] on wmma_f32_16x16x32_bf16 (PR #188649)

[Shilei Tian via cfe-commits]

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@@ -1526,19 +1527,28 @@ class VOP3PWMMA_Profile<list<ValueType> ArgTy, bit _IsSWMMAC, int _IndexType,
   bit IsAB_BF16 = !or(!eq(ArgTy[1], v16i16), !eq(ArgTy[1], v8i16), !eq(ArgTy[1], v4i16),
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shiltian wrote:

We also need to upgrade the legacy data types used here for more accurate control. Again, I know this is beyond the scope of this PR.

https://github.com/llvm/llvm-project/pull/188649