Hi All, Here is a simple patch for unswitching outer loop through guard-edge hoisting. The check that guard-edge is around the inner loop was missed.
Bootstrapping and regression testing did not show new failures. Is it OK for trunk? ChangeLog: 2014-10-13 Yuri Rumyantsev <ysrum...@gmail.com> PR tree-optimization/67909, 67947 * tree-ssa-loop-unswitch.c (find_loop_guard): Add check that GUARD_EDGE really skip the inner loop. gcc/testsuite/ChangeLog * gcc.dg/torture/pr67947.c: New test.
patch
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