On 08/11/14 07:41, Kyrill Tkachov wrote:
I haven't been able to get combine to match the comparison+xor+neg+plus
RTL and it seems like it would be just a workaround to undo the
tree-level transformation.
Yea, it'd just be a workaround, but it's probably the easiest way to
deal with this problem. Can you describe in further detail why you
weren't able to get this to work?
What is the most acceptable way of disabling this transformation for a
target that has a conditional negation instruction?
In general, we don't want target dependencies in the gimple/ssa optimizers.
Jeff
