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The PR shows that when carefully crafting the runtime alias condition in the vectorizer we might end up using defs from the loop preheader but will end up inserting the condition before the .LOOP_VECTORIZED call. So the following makes sure to insert invariants before that when we versioned the loop, preserving the invariant the vectorizer relies on. 2021-10-19 Richard Biener <rguenther@suse.de> PR tree-optimization/102827 * tree-if-conv.c (predicate_statements): Add pe parameter and use that edge to insert invariant stmts on. (combine_blocks): Pass through pe. (tree_if_conversion): Compute the edge to insert invariant stmts on and pass it along. * gcc.dg/pr102827.c: New testcase. |
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