search for: inremenet

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2012 May 11
2
[LLVMdev] overlaps generation, RA crasch
...hich caused the RA to crash. Reg Subreg1 Subreg b Subreg2 Subreg b I have a register with two subregs that have subreg b in common. This causes the SuperReg to appear twice in the ovelaps list for Subreg b. As this causes a register allocator to crasch (it evicts a register, and then inremenets the *AliasI, but the data structure is then not ready to be re-used, so a dual entry is not expected here), I suggest that TableGen makes the overlaps list a set (each register present only once), as I find at least my model very reasonable, and it has worked before. An alternative might be to cha...