Remove redundant checks related to quantized type

Author: sdasgup3

mlir/lib/Dialect/Quant/IR/QuantTypes.cpp

@@ -322,8 +322,6 @@ LogicalResult UniformQuantizedType::verifyInvariants(
   // Verify scale.
   double minScale = getMinScale(expressedType);
   double maxScale = getMaxScale(expressedType);
-  if (scale <= 0.0 || std::isinf(scale) || std::isnan(scale))
-    return emitError() << "illegal scale: " << scale;
   if (scale < minScale || scale > maxScale)
     return emitError() << "scale out of expressed type range [" << minScale
                        << ", " << maxScale << "]";
@@ -388,8 +386,6 @@ LogicalResult UniformQuantizedPerAxisType::verifyInvariants(
   double minScale = getMinScale(expressedType);
   double maxScale = getMaxScale(expressedType);
   for (double scale : scales) {
-    if (scale <= 0.0 || std::isinf(scale) || std::isnan(scale))
-      return emitError() << "illegal scale: " << scale;
     if (scale < minScale || scale > maxScale)
       return emitError() << "scale out of expressed type range [" << minScale
                          << ", " << maxScale << "]";

mlir/test/Dialect/Quant/parse-uniform-invalid.mlir

@@ -107,7 +107,7 @@
 
 // -----
 // Illegal scale: negative
-// expected-error@+1 {{illegal scale: -1.000000}}
+// expected-error@+1 {{scale out of expressed type range}}
 !qalias = !quant.uniform<i8<-4:3>:f32, -1.0:127>
 
 // -----