[clang] [compiler-rt] [llvm] [X86][AVX10.2] Support AVX10.2 option and VMPSADBW/VADDP[D,H,S] new instructions (PR #101452)

[Shengchen Kan via cfe-commits]

================
@@ -1219,6 +1219,9 @@ static int getInstructionID(struct InternalInstruction 
*insn,
         attrMask |= ATTR_EVEXKZ;
       if (bFromEVEX4of4(insn->vectorExtensionPrefix[3]))
         attrMask |= ATTR_EVEXB;
+      if (x2FromEVEX3of4(insn->vectorExtensionPrefix[2]) &&
+          (insn->opcodeType != MAP4))
----------------
KanRobert wrote:

I think you also need to check more things for this, e.g. `EVEX.b`. Since the 
APX SPEC says

> When any of the bits in EVEX.{R4,X4,B4} is not used by a promoted VEX 
> instruction, it is ignored, 

@FreddyLeaf is working on adding tests for the ignore semantic while it's not 
ready yet.

https://github.com/llvm/llvm-project/pull/101452
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