[Jikesrvm-core] [ jikesrvm-Bugs-1644460 ] DaCapo lusearch fails when opt compiled

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Bugs item #1644460, was opened at 2007-01-26 01:24
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Category: optimizing compiler
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Robin Garner (rgarner)
Assigned to: Nobody/Anonymous (nobody)
Summary: DaCapo lusearch fails when opt compiled

Initial Comment:
DaCapo lusearch fails to validate when compiled with the opt compiler.  

lusearch queries a corpus of documents, and results are sorted by relevance (a float) and a document serial number.  The comparison returns different results under baseline (correct) and opt compilers (incorrect).

public class LusearchBug {
  public static float b = 0.009765625f;
  public static float a = 10.57379f;

  /**
   * @param args
   */
  public static void main(String[] args) {
    float c = a * b;
    System.out.println(c == 0.10325967f);
  }
}

rvm -X:aos:initial_compiler=base LusearchBug
true
rvm -X:aos:initial_compiler=opt LusearchBug
false

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=712768&aid=1644460&group_id=128805