Minimizing register spills by using register moves
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United States of America Patent
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Apr 14, 2015
Grant Date -
Jun 30, 2011
app pub date -
Dec 26, 2009
filing date -
Dec 26, 2009
priority date (Note) -
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Abstract
A system and method for minimizing register spills during compilation. A compiler reallocates spilled variables from stack memory to other available registers. Although a corresponding register file may not have available registers for storage, the compiler identifies available registers in other locations for storage. The compiler identifies available registers in an alternate register file, wherein the alternate register file may be a floating-point register file which is then used for spilled integer variables. Other instruction type combinations between spilled variables and alternate register files are possible. When an available register within the alternate register file is identified, the compiler modifies the program instructions to allocate the corresponding spilled variable to the available register.
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