bcm5719-llvm - Project Ortega BCM5719 LLVM

	Commit message (Collapse)	Author	Age	Files	Lines
*	[PhiValues] Use callback value handles to invalidate deleted values	John Brawn	2018-08-24	1	-4/+34
\| \| \| \| \| \| \| \| \| \| \|	The way that PhiValues is integrated with BasicAA it is possible for a pass which uses BasicAA to pick up an instance of BasicAA that uses PhiValues without intending to, and then delete values from a function in a way that causes PhiValues to return dangling pointers to these deleted values. Fix this by having a set of callback value handles to invalidate values when they're deleted. llvm-svn: 340613
*	[BasicAA] Use PhiValuesAnalysis if available when handling phi alias	John Brawn	2018-07-30	1	-0/+50
	By using PhiValuesAnalysis we can get all the values reachable from a phi, so we can be more precise instead of giving up when a phi has phi operands. We can't make BaseicAA directly use PhiValuesAnalysis though, as the user of BasicAA may modify the function in ways that PhiValuesAnalysis can't cope with. For this optional usage to work correctly BasicAAWrapperPass now needs to be not marked as CFG-only (i.e. it is now invalidated even when CFG is preserved) due to how the legacy pass manager handles dependent passes being invalidated, namely the depending pass still has a pointer to the now-dead dependent pass. Differential Revision: https://reviews.llvm.org/D44564 llvm-svn: 338242