[Bug rtl-optimization/21767] if-convert leaves invalid REG_EQUAL notes

[amylaar at gcc dot gnu dot org]

------- Additional Comments From amylaar at gcc dot gnu dot org  2005-06-01 18:53 -------
(In reply to comment #4)
> Well, 3.4 is open for regression fixes only. Did the testcase ever work before 
> 3.4 in any previous GCC version?

P.S.: There used to be an euivalent optimization in jump.c, but that one
explicitly acknowledged the problem with REG_EQUAL notes possibly confusing
cse, and didn't do the transformation if a non-trivial REG_EQUAL note was
present.  For details, do:
cvs -z 9 dif -puw -r1.119 -r1.120 jump.c|less
and search for:
x = a; goto l



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21767