Minor Fixes

Author: aankit-ca

src/CodeGen_Hexagon.cpp

@@ -1923,7 +1923,7 @@ void CodeGen_Hexagon::visit(const Call *op) {
 
         // Cut up the indices into appropriately-sized pieces.
         for (int start = 0; start < index_lanes; start += intrin_lanes) {
-            vector <Value *>args;
+            vector<Value *> args;
             Value *new_index = slice_vector(index, start, intrin_lanes);
             args.push_back(dst_buffer);
             args.push_back(codegen(op->args[1] + start));

src/HexagonOptimize.cpp

@@ -2062,9 +2062,9 @@ class ScatterGatherGenerator : public IRMutator2 {
             index_span = simplify(index_span);
             // We need to downcast the index values to 16 bit signed. So all the
             // the indices must be less than 1 << 15.
-            // if (!can_prove(index_span < std::numeric_limits<int16_t>::max())) {
-            //     return Expr();
-            // }
+            if (!can_prove(index_span < std::numeric_limits<int16_t>::max())) {
+                return Expr();
+            }
         }
         // Calculate the size of the buffer lut in bytes.
         Expr size = ty.bytes();
@@ -2091,7 +2091,7 @@ class ScatterGatherGenerator : public IRMutator2 {
         if (!alloc || alloc->memory_type != MemoryType::VTCM) {
             return IRMutator2::visit(op);
         }
-        // The destination must be a buffer in VTCM.
+        // The source for a gather must also be a buffer in VTCM.
         if (op->index.as<Ramp>() && op->value.as<Load>()) {
             // Check for vgathers
             Expr dst_base = Variable::make(Handle(), op->name);

src/IRMutator.cpp

@@ -1,11 +1,8 @@
 #include "IRMutator.h"
-#include "IRPrinter.h"
 
 namespace Halide {
 namespace Internal {
 
-IRPrinter irp(std::cerr);
-
 using std::pair;
 using std::vector;