Add slice tests to demonstrate manual scheduling (#2898)

Slice and concat patterns without rotation. See #2851.

Stacked on #2897, #2875
Closes #2870

csrc/device_lower/lower2device.cpp

@@ -468,9 +468,6 @@ void GpuLower::analysis(Fusion* fusion) {
   validateSwizzle(fusion_);
   dumpExprsIfEnabled(fusion_->exprs(), "validateSwizzle");
 
-  validateResize(fusion_);
-  dumpExprsIfEnabled(fusion_->exprs(), "validateResize");
-
   validateReductions(fusion_);
   dumpExprsIfEnabled(fusion_->exprs(), "validateReductions");
 

csrc/device_lower/validation.cpp

@@ -1058,25 +1058,6 @@ void validateLookupTV(Fusion* fusion) {
   }
 }
 
-void validateResize(Fusion* fusion) {
-  auto fusion_vals = fusion->usedMathVals();
-  for (auto tv : ir_utils::filterByType<TensorView>(fusion_vals)) {
-    // Make sure resize is only used as part of root to logical transformations
-    auto rf_to_loop_exprs = StmtSort::getExprsBetween(
-        {tv->getLogicalDomain().begin(), tv->getLogicalDomain().end()},
-        {tv->getLoopDomain().begin(), tv->getLoopDomain().end()});
-
-    NVF_ERROR(
-        std::none_of(
-            rf_to_loop_exprs.begin(),
-            rf_to_loop_exprs.end(),
-            [](Expr* expr) { return expr->isA<Resize>(); }),
-        "Invalid use of resize detected with ",
-        tv->toString(),
-        ". Resize may only be used as part of root to logical transformations.");
-  }
-}
-
 void validateReductions(Fusion* fusion) {
   for (auto rop : ir_utils::getOpsOfType<ReductionOp>(fusion)) {
     auto in = rop->in()->as<TensorView>();

csrc/device_lower/validation.h

@@ -68,9 +68,6 @@ void validateGroupedReductions(Fusion* fusion);
 //! Validate all of the lookup TVs are ensured to be fusion inputs
 void validateLookupTV(Fusion* fusion);
 
-//! Validate resize usage
-void validateResize(Fusion* fusion);
-
 //! Check that there are no reductions over unexpanded broadcasts
 void validateReductions(Fusion* fusion);