------- Comment #21 from bonzini at gnu dot org 2006-10-03 18:07 ------- Note that I don't oppose at all fixing the problem in swap_commutative_operands_p. At the very least, you have to change at the very least simplify-rtx.c's uses of commutative_operand_precedence to use s_c_o_p instead, but that's a minor problem.
I'm also worried of the interaction between this change to swap_commutative_operands_p and swap_commutative_operands_with_target which (even though I refactored it quite recently to happen very early, in expand) is an optimization that CSE has performed for years and has big impact on x86, for example on crafty. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28690
