2 commits

Author	SHA1	Message	Date
Bill Currie	7271d2d570	[qfcc] Add flags for commutative and anticommutative ... They don't have much effect that I've noticed, but the expression dags code does check for commutative expressions. The algebra code uses the anticommutative flag for cross, wedge and subtract (unconditional at this stage). Integer ops that are commutative are always commutative (or anticommutative). Floating point ops can be controlled (default to non), but no way to set the options currently.	2023-09-25 17:26:37 +09:00
Bill Currie	155a8cbcda	[qfcc] Use dags for many expressions ... Especially binary expressions. That expressions can now be reused is what caused the need to make expression lists non-invasive: the reuse resulted in loops in the lists. This doesn't directly affect code generation at this stage but it will help with optimizing algebraic expressions. The dags are per sequence point (as per my reading of the C spec).	2023-09-25 16:57:15 +09:00