only GROUPTOP one reduce kernel (tinygrad#13176)

* only GROUPTOP one reduce kernel

* ALLOWED_GATED_READ_IMAGE=148

Author: chenyuxyz

.github/workflows/test.yml

@@ -392,7 +392,7 @@ jobs:
           llvm: 'true'
       - name: Test openpilot model kernel count and gate usage
         run: |
-          ALLOWED_KERNEL_COUNT=123 ALLOWED_READ_IMAGE=1452 ALLOWED_GATED_READ_IMAGE=122 FLOAT16=1 CL=1 IMAGE=2 python examples/openpilot/compile3.py https://gitlab.com/commaai/openpilot-lfs.git/gitlab-lfs/objects/cf6376aa9a090f0da26c280ef69eabf9bbdd51d1faac9ed392919c3db69be916
+          ALLOWED_KERNEL_COUNT=123 ALLOWED_READ_IMAGE=1452 ALLOWED_GATED_READ_IMAGE=148 FLOAT16=1 CL=1 IMAGE=2 python examples/openpilot/compile3.py https://gitlab.com/commaai/openpilot-lfs.git/gitlab-lfs/objects/cf6376aa9a090f0da26c280ef69eabf9bbdd51d1faac9ed392919c3db69be916
       - name: Test openpilot CL compile fp16
         run: FLOAT16=1 DEBUGCL=1 CL=1 IMAGE=2 python examples/openpilot/compile3.py https://gitlab.com/commaai/openpilot-lfs.git/gitlab-lfs/objects/cf6376aa9a090f0da26c280ef69eabf9bbdd51d1faac9ed392919c3db69be916
       - name: Test openpilot CL compile fp32 (test correctness)

tinygrad/codegen/opt/heuristic.py

@@ -81,7 +81,7 @@ def hand_coded_optimizations(k:Scheduler) -> Scheduler:
             return k
 
   # are we grouping? (requires local shape support)
-  if resolve(prod(k.output_shape[i] for i in k.upcastable_dims) <= 2048, False):
+  if resolve(prod(k.output_shape[i] for i in k.upcastable_dims) <= 2048, False) and len(k.reduceops) == 1:
     for sz in [16]:
       try:
         k.apply_opt(Opt(OptOps.GROUPTOP, 0, sz))