41439e1f6d
This fixes DCE to be able to elide dead control flow in an infinite loop without an exit edge. This special situation is handled well by the code finding an edge to preserve since there's no chance it will find the exit edge and make the loop finite. 2021-08-27 Richard Biener <rguenther@suse.de> PR tree-optimization/45178 * tree-ssa-dce.c (find_obviously_necessary_stmts): For infinite loops without exit do not mark control dependent edges of the latch necessary. * gcc.dg/tree-ssa/ssa-dce-3.c: Adjust testcase. |
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| contrib | ||
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| gcc | ||
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| configure | ||
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| MAINTAINERS | ||
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