2 Commits

Author	SHA1	Message	Date
Nemanja Ivanovic	6e9223a2c6	[PowerPC][NFC] Update test to prevent DCE from causing failures ... The test case provided in PR45709 can be simplified by DCE to an empty function. To prevent this from happening if DCE is run prior to ISEL in the back end, just add optnone to the function. The behaviour it is testing for is in the SDAG legalization and is not sensitive to optnone so the test case still achieves its desired objective.	2020-05-26 13:37:48 -05:00
Nemanja Ivanovic	793cc518b9	[PowerPC] Prevent legalization loop from promoting SELECT_CC from v4i32 to v4i32 ... As reported in https://bugs.llvm.org/show_bug.cgi?id=45709 we can hit an infinite loop in legalization since we set the legalization action for ISD::SELECT_CC for all fixed length vector types to Promote. Without some different legalization action for the type being promoted to, the legalizer simply loops. Since we don't have patterns to match the node, the right legalization action should be Expand. Differential revision: https://reviews.llvm.org/D79854	2020-05-25 20:09:07 -05:00