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authorJeff Law <law@gcc.gnu.org>2015-11-06 16:26:20 -0700
committerJeff Law <law@gcc.gnu.org>2015-11-06 16:26:20 -0700
commitb9e59e4f11bc85b72167f93d1f356ff77074af01 (patch)
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parenta6fa947e8261399636817b840fd0fc7c202742e6 (diff)
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[PATCH] Allow vrp to thread across backedges using FSM threader
* cfg-flags.def (IGNORE): New edge flag. * tree-vrp.c (identify_jump_threads): Mark and clear edges scheduled for removal with EDGE_IGNORE around call into jump threader. Do no thread across edges with EDGE_IGNORE, but do allow threading across those with EDGE_DFS_BACK. * gcc.dg/tree-ssa/ssa-dom-thread-7.c: Adjust to look for realized jump threads. * gcc.dg/tree-ssa-pr66752-3.c: Look in vrp1 dump for jump threads rather than dom1 dump. From-SVN: r229902
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