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23187
2016 Aug 05
3
GVN Hoist moving a store across load
Hi,
I have a scenario, roughly like this:
if (...) {
... = *x
*x = 0
} else {
... = *x
*x = 0
}
The two sides are functionally different, but both load some value and
then set it to 0.
After GVN Hoist, I get:
*x = 0
if (...) {
... = *x
} else {
... = *x
}
That is, the store was hoisted above the loads.
The code is not exactly public, so I