[m-rev.] For review by Fergus: Loop Invariant Hoisting

[Zoltan Somogyi]

On 30-Oct-2002, Ralph Becket <rafe at cs.mu.OZ.AU> wrote:
> In asm_fast.gc:
> mercury_compile.01 average of 12 with ignore=1     52.88
> mercury_compile.02 average of 12 with ignore=1     52.31
> mercury_compile.03 average of 12 with ignore=1     51.40
> mercury_compile.04 average of 12 with ignore=1     51.96
> mercury_compile.05 average of 12 with ignore=1     50.72
> mercury_compile.06 average of 12 with ignore=1     50.62
> mercury_compile.07 average of 12 with ignore=1     50.37
> mercury_compile.08 average of 12 with ignore=1     50.55
> mercury_compile.09 average of 12 with ignore=1     56.99
> mercury_compile.10 average of 12 with ignore=1     57.46
> 
> In hlc.gc:
> mercury_compile.11 average of 12 with ignore=1     50.39
> mercury_compile.12 average of 12 with ignore=1     50.44
> mercury_compile.13 average of 12 with ignore=1     52.62
> mercury_compile.14 average of 12 with ignore=1     50.80
> mercury_compile.15 average of 12 with ignore=1     50.38
> mercury_compile.16 average of 12 with ignore=1     50.36
> mercury_compile.17 average of 12 with ignore=1     51.91
> mercury_compile.18 average of 12 with ignore=1     50.67
> mercury_compile.19 average of 12 with ignore=1     51.61
> mercury_compile.20 average of 12 with ignore=1     50.45

I forgot whether it is the odd or the even numbers that have loop invariant
optimization enabled. Which is it?

Zoltan.
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