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Post-register allocation profile directed instruction scheduling

  • US 7,770,161 B2
  • Filed: 12/28/2005
  • Issued: 08/03/2010
  • Est. Priority Date: 12/28/2005
  • Status: Active Grant
First Claim
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1. A computer implemented method for selective instruction scheduling, the computer implemented method comprising:

  • determining whether a region of code exceeds a modification threshold after performing register allocation on the region of code;

    recording a number of register spills, a number of register copies and a number of register exchanges that occur during register allocationresponsive to determining that the region of code exceeds the modification threshold, marking the region of code as a modified region of code;

    responsive to marking the region of code as the modified region of code, determining whether the region of code exceeds an execution threshold;

    and responsive to determining that the region of code is marked as a modified region of code and determining that the region of code exceeds the execution threshold, performing post-register allocation instruction scheduling on the region of code.

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