[Bug optimization/13424] [3.4 Regression] gcc.dg/20031202-1.c is miscompiled

[ebotcazou at gcc dot gnu dot org]

------- Additional Comments From ebotcazou at gcc dot gnu dot org  2003-12-18 19:52 -------
It's a regression on mainline, at least on SPARC: we have a testcase that passed
before the patch and doesn't after.

But I don't see the bug on the 3.3 branch, because RTX_UNCHANGING_P is not set
anymore at all: before Jakub's patch, the situation was (1,1) on mainline and
(0,1) on branch, so the two MEMs were detected as aliasing on mainline and not
on branch. After Jakub's patch, the situation is (1,0) on mainline and (0,0) on
branch, so the two MEMs are detected as aliasing on branch but not on mainline.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13424