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The check whether two blocks are in the same irreducible region and thus post-dominance checks being unreliable was incomplete since an irreducible region can contain reducible sub-regions but if one block is in the irreducible part and one not the check still doesn't work as expected. 2021-06-22 Richard Biener <rguenther@suse.de> PR tree-optimization/101151 * tree-ssa-sink.c (statement_sink_location): Expand irreducible region check. * gcc.dg/torture/pr101151.c: New testcase. |
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