Hal Finkel 6f1ff8e1a8 Fix crash in AggressiveAntiDepBreaker with empty CriticalPathSet ...

If no register classes are added to CriticalPathRCs, then the CriticalPathSet
bitmask will be empty. In that case, ExcludeRegs must remain NULL or else this
line will cause a segfault:

  } else if ((ExcludeRegs != NULL) && ExcludeRegs->test(AntiDepReg)) {

I have no in-tree test case.

llvm-svn: 190584

2013-09-12 04:22:31 +00:00

34 KiB

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