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Dan Gohman
d3a8d79c0d
Implement more aggressive folding of add operand lists when
they contain multiplications of constants with add operations. This helps simplify several kinds of things; in particular it helps simplify expressions like ((-1 * (%a + %b)) + %a) to %b, as expressions like this often come up in loop trip count computations. llvm-svn: 73361
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