re PR tree-optimization/92712 (Performance regression with assumed values)

re PR tree-optimization/92712 (Performance regression with assumed values)

	PR tree-optimization/92712
	* match.pd ((A * B) +- A -> (B +- 1) * A,
	A +- (A * B) -> (1 +- B) * A): Allow optimizing signed integers
	even when we don't know anything about range of A, but do know
	something about range of B and the simplification won't introduce
	new UB.

	* gcc.dg/tree-ssa/pr92712-1.c: New test.
	* gcc.dg/tree-ssa/pr92712-2.c: New test.
	* gcc.dg/tree-ssa/pr92712-3.c: New test.
	* gfortran.dg/loop_versioning_1.f90: Adjust expected number of
	likely to be innermost dimension messages.
	* gfortran.dg/loop_versioning_10.f90: Likewise.
	* gfortran.dg/loop_versioning_6.f90: Likewise.

From-SVN: r278894