Use of different color sequences for variables of different sizes and different semantics
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United States of America Patent
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Feb 27, 2007
Grant Date -
N/A
app pub date -
Mar 28, 2003
filing date -
Mar 28, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Colors to be used in register allocation are grouped into a number of sequences. Each sequence is associated with an attribute (e.g. size and/or type) of variables whose nodes in an interference graph can be colored by colors in the sequence. In certain embodiments, in addition to the above-described grouping, colors within a group are ordered in a sequence. The specific order that is used may depend on, for example, an attribute (such as size) and a predetermined preference. One example of such a predetermined preference is that a color that represents a register of the size that is associated with the sequence is located at the front of the sequence. Another color located later in the sequence represents a register of a different size than the size associated with the sequence.
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