There is no node left that uses it.

This fixes opt/fehler298.c.

Otherwise, the code would be broken.

This fixes opt/fehler299.c.

The optimization does not work properly for relation_true and relation_false.

This fixes several test on ARM.

Victor Pfautz authored Dec 22, 2014 and yb9976 committed Jun 01, 2015

-(a & (-a)) -> a | (-a)
-(a | (-a)) -> a & (-a)

The optimization was disabled by 8e35902f.

This fixes opt/minus_zero.c.

Strange casts may cause that a Load ends up with a method entity to load from.

This prevented optimizing x < 0 ? -1 : 0, when the result is unsigned.

The same test is done by an enclosing if.

This simplifies to understand the pattern when reading the code.

It is a sign extension when the operand is signed, not just when both the operand and the result are signed.

mode_b cannot/must be present in these places, otherwise the verifier would have complained.