if (getRhs() == add.getRhs())
return add.getLhs();
+ // complex.sub(a, complex.constant<0.0, 0.0>) -> a
+ if (auto constantOp = getRhs().getDefiningOp<ConstantOp>()) {
+ auto arrayAttr = constantOp.getValue();
+ if (arrayAttr[0].cast<FloatAttr>().getValue().isZero() &&
+ arrayAttr[1].cast<FloatAttr>().getValue().isZero()) {
+ return getLhs();
+ }
+ }
+
return {};
}
%add = complex.add %complex1, %complex2 : complex<f32>
%sub = complex.sub %add, %complex2 : complex<f32>
return %sub : complex<f32>
+}
+
+// CHECK-LABEL: func @complex_sub_zero
+func.func @complex_sub_zero() -> complex<f32> {
+ %complex1 = complex.constant [1.0 : f32, 0.0 : f32] : complex<f32>
+ %complex2 = complex.constant [0.0 : f32, 0.0 : f32] : complex<f32>
+ // CHECK: %[[CPLX:.*]] = complex.constant [1.000000e+00 : f32, 0.000000e+00 : f32] : complex<f32>
+ // CHECK-NEXT: return %[[CPLX:.*]] : complex<f32>
+ %sub = complex.sub %complex1, %complex2 : complex<f32>
+ return %sub : complex<f32>
}
\ No newline at end of file