Repository: pytorch
Issue: [inductor][cpu] fused attention Inductor tests fails with an error " name 'getitem' is not defined "
Labels: oncall: pt2,oncall: cpu inductor

### 🐛 Describe the bug

I have regrenrated all the patterens with the flag PYTORCH_GEN_PATTERNS=1 by setting config flag "fallback_random" is set to true. By default this falg is false. 

After setting this flag to True. I ran existing fused attention tests but the test failed with the following error.

**CMD to run the test:**

1. run once with the flag regenerte patterns
     PYTORCH_GEN_PATTERNS=1 python -m pytest test_fused_attention.py -k test_sdpa_rewriter_1_cpu   
2. run again
    python -m pytest test_fused_attention.py -k test_sdpa_rewriter_1_cpu 

**Error:**

NameError: name 'getitem' is not defined

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib/python3.10/unittest/case.py", line 59, in testPartExecutor
    yield
  File "/usr/lib/python3.10/unittest/case.py", line 591, in run
    self._callTestMethod(testMethod)
  File "/usr/lib/python3.10/unittest/case.py", line 549, in _callTestMethod
    method()



### Versions

Collecting environment information...
PyTorch version: 2.5.0a0+gite84e33f
Is debug build: False
CUDA used to build PyTorch: None
ROCM used to build PyTorch: N/A

OS: Ubuntu 22.04.3 LTS (x86_64)
GCC version: (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0
Clang version: 14.0.0-1ubuntu1.1
CMake version: version 3.22.1
Libc version: glibc-2.35

Python version: 3.10.12 (main, Nov  6 2024, 20:22:13) [GCC 11.4.0] (64-bit runtime)
Python platform: Linux-5.15.0-127-generic-x86_64-with-glibc2.35
Is CUDA available: False
CUDA runtime version: No CUDA
CUDA_MODULE_LOADING set to: N/A
GPU models and configuration: No CUDA
Nvidia driver version: No CUDA
cuDNN version: No CUDA
HIP runtime version: N/A
MIOpen runtime version: N/A
Is XNNPACK available: True

CPU:
Architecture:                         x86_64
CPU op-mode(s):                       32-bit, 64-bit
Address sizes:                        43 bits physical, 48 bits virtual
Byte Order:                           Little Endian
CPU(s):                               12
On-line CPU(s) list:                  0-11
Vendor ID:                            GenuineIntel
Model name:                           Intel(R) Xeon(R) Gold 5220R CPU @ 2.20GHz
CPU family:                           6
Model:                                85
Thread(s) per core:                   1
Core(s) per socket:                   6
Socket(s):                            2
Stepping:                             0
BogoMIPS:                             4389.68
Flags:                                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon nopl xtopology tsc_reliable nonstop_tsc cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow vnmi ept vpid ept_ad fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xsaves arat pku ospke md_clear flush_l1d arch_capabilities
Virtualization:                       VT-x
Hypervisor vendor:                    VMware
Virtualization type:                  full
L1d cache:                            384 KiB (12 instances)
L1i cache:                            384 KiB (12 instances)
L2 cache:                             12 MiB (12 instances)
L3 cache:                             71.5 MiB (2 instances)
NUMA node(s):                         1
NUMA node0 CPU(s):                    0-11
Vulnerability Gather data sampling:   Unknown: Dependent on hypervisor status
Vulnerability Itlb multihit:          KVM: Mitigation: VMX disabled
Vulnerability L1tf:                   Mitigation; PTE Inversion; VMX flush not necessary, SMT disabled
Vulnerability Mds:                    Mitigation; Clear CPU buffers; SMT Host state unknown
Vulnerability Meltdown:               Mitigation; PTI
Vulnerability Mmio stale data:        Mitigation; Clear CPU buffers; SMT Host state unknown
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed:               Mitigation; IBRS
Vulnerability Spec rstack overflow:   Not affected
Vulnerability Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl and seccomp
Vulnerability Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2:             Mitigation; IBRS; IBPB conditional; STIBP disabled; RSB filling; PBRSB-eIBRS Not affected; BHI SW loop, KVM SW loop
Vulnerability Srbds:                  Not affected
Vulnerability Tsx async abort:        Not affected

Versions of relevant libraries:
[pip3] flake8==7.0.0
[pip3] intel_extension_for_pytorch==2.5.10+git1104b12
[pip3] numpy==1.26.4
[pip3] torch==2.5.0a0+gite84e33f
[pip3] torchaudio==2.1.0+6ea1133
[pip3] torchvision==0.16.0+fbb4cc5
[conda] Could not collect


cc @soulitzer @chauhang @penguinwu