[llvm] [PowerPC10][XXEVAL] Exploit xxeval instruction for cases of the ternary(A,X, and(B,C)), ternary(A,X,B), ternary(A,X,C), ternary(A,X,xor(B,C)) forms. (PR #141733)

[Lei Huang via llvm-commits]

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@@ -2159,8 +2159,133 @@ let AddedComplexity = 400, Predicates = [IsISA3_1, HasVSX] in {
                                (COPY_TO_REGCLASS $VRB, VSRC), 2)))>;
 }
 
-class xxevalPattern <dag pattern, bits<8> imm> :
-  Pat<(v4i32 pattern), (XXEVAL $vA, $vB, $vC, imm)> {}
+class XXEvalPattern <ValueType vt, dag pattern, bits<8> imm> :
+  Pat<(vt pattern), (XXEVAL $vA, $vB, $vC, imm)> {}
+
+class DagUnaryVNot<ValueType vt, string opstr>{
+  // Defines a class that returns the UnaryVNot dag for an operand string based on a value type.
+  dag res = !cond(
+          !eq(vt, v4i32) : !dag(vnot, [v4i32], [opstr]),
+          !eq(vt, v2i64) : (v2i64 (bitconvert (vnot (v4i32 !dag(bitconvert, [v2i64], [opstr])))))
+          );
+}
+
+class DagCondVNot<dag d, bit negate> {
+  // Defines a class that generates a vnot around the dag.
----------------
lei137 wrote:

this only generate vnot(dag) if "negate!=0"?


https://github.com/llvm/llvm-project/pull/141733