[Bug tree-optimization/37698] New: [alias-improvements-branch] pre makes latech-block non-empty
dorit at gcc dot gnu dot org
gcc-bugzilla@gcc.gnu.org
Wed Oct 1 14:28:00 GMT 2008
This happens in testcase gcc.dg/vect/vect-62.c:
looks like on the alias branch pre is more powerful, as it moves the load into
the latch block; as a result the latch block is not empty, and we fail to
vectorize (with -fno-tree-pre vectorization succeeds).
Related non-empty-latch PRs that prevernt vectorization: PR28643, PR33447
--
Summary: [alias-improvements-branch] pre makes latech-block non-
empty
Product: gcc
Version: unknown
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dorit at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37698
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