[PATCH] D91927: [X86] Add x86_amx type for intel AMX.

[Pengfei Wang via Phabricator via llvm-commits]

pengfei added a comment.

> In my test case, it is transformed after Combine redundant instructions.

Can we disable it for AMX type? The pointer to AMX type is meaningless and may result in bad perfomance.



================
Comment at: llvm/lib/Target/X86/X86LowerAMXType.cpp:300
+        // If the dst type is <256 x i32>*, it is valid intruction.
+        // %0 = bitcast x86_amx* %tile to <256 x i32>*
+        // %1 = load <256 x i32>, <256 x i32>* %0, align 64
----------------
I don't see any chance this happen. But we still need to handle the x86_amx* here if possible, right?
Maybe better to give an assertion for now.
```
cast<PointerType>(Src->getType())->isX86_AMXTy()
```


Repository:
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  https://reviews.llvm.org/D91927/new/

https://reviews.llvm.org/D91927