Overly-aggressive optimization at module level

[rjpower]

Running pystone with optimizations enabled causes it to prune too much of the program and results in it not actually running the benchmark. I'm guessing that LOAD/STORE_NAME are being treated improperly.

power kermit:/tmp/falcon-master [10520]% PYTHONPATH=src/ python -mfalcon benchmarks/pystone.py              
I 0.000 [ 9819] ../../src/falcon/rcompile.cc:888 COMPILED code, 36 registers, 113 operations, 155 stack ops.
I 0.000 [ 9819] ../../src/falcon/rcompile.cc:888 COMPILED Record, 5 registers, 8 operations, 15 stack ops.
power kermit:/tmp/falcon-master [10521]% DISABLE_OPT=1 PYTHONPATH=src/ python -mfalcon benchmarks/pystone.py
I 0.000 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED code, 97 registers, 113 operations, 155 stack ops.
I 0.000 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Record, 8 registers, 8 operations, 15 stack ops.
I 0.000 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED main, 14 registers, 15 operations, 21 stack ops.
I 0.000 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED pystones, 4 registers, 3 operations, 4 stack ops.
I 0.001 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc0, 105 registers, 120 operations, 182 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc5, 3 registers, 4 operations, 6 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc4, 7 registers, 10 operations, 12 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Func2, 28 registers, 33 operations, 60 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Func1, 8 registers, 8 operations, 14 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc7, 8 registers, 5 operations, 10 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc8, 31 registers, 30 operations, 70 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc1, 27 registers, 37 operations, 59 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED copy, 9 registers, 8 operations, 13 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc3, 12 registers, 15 operations, 18 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc6, 24 registers, 42 operations, 51 stack ops.
I 0.002 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Func3, 7 registers, 8 operations, 10 stack ops.
I 0.003 [ 9820] ../../src/falcon/rcompile.cc:888 COMPILED Proc2, 16 registers, 17 operations, 29 stack ops.
Pystone(1.1) time for 50000 passes = 0.19
This machine benchmarks at 263158 pystones/second
power kermit:/tmp/falcon-master [10522]%