[Bug tree-optimization/18478] [4.0 Regression] ICE with -funroll-loops

[kazu at cs dot umass dot edu]

------- Additional Comments From kazu at cs dot umass dot edu  2004-11-14 15:47 -------
I am doing a binary search right now, but it's probably Jeff's patch that
causes this bug.

With his patch, GCC shares some CASE_LABEL_EXPR within one SWITCH_EXPR.
When a basic block is copied, I don't think these shared CASE_LABEL_EXPR
are properly updated.  Specifically, it's possible that one CASE_LABEL_EXPR
points to another CASE_LABEL_EXPR of another SWITCH_EXPR.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18478