Automatic scheduling of instructions to reduce code size
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United States of America Patent
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May 9, 2000
Grant Date -
N/A
app pub date -
Mar 17, 1997
filing date -
Mar 17, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Scheduling instructions by eliminating COPY instructions to reduce code size and increase performance in a computer program compiler. According to one embodiment of the present invention COPY instructions are coalesced prior to preparing a ready list. The ready list is polled and instructions selected for scheduling. After selection of a next instruction, liveness conflicts are determined, where a live register contains a valid value that is needed at a later step. Conflicts are then resolved and instruction scheduling continues. The process is continued until the ready list is empty.
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