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* tree-vrp.c (test_for_singularity): Correct test for new min limit. Use operand_equal_p rather than pointer equality for testing if new min/max values are equal. * tree-ssa-propagate.c (substitute_and_fold): Delay simplifications using range information until after propagation and folding. * gcc.c-torture/execute/930529-1.x: Use -fwrapv as test depends on wrapping on overflow semantics. * gcc.dg/tree-ssa/pr23109.c: Remove the .lim file too. * gcc.gc/tree-ssa/vrp23.c: New test. * gcc.gc/tree-ssa/vrp24.c: New test. From-SVN: r109904
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