Compile with -O0 is broken

[schoeberl]

When compiling without any optimization, there is an issue in the single path code:

Error: Block without region: sw.epilog7351102[186], SCCSize: 0
Assertion failed: (UnassignedBlocks == 0), function computeRegions, file PatmosFunctionSplitter.cpp, line 1381.
PLEASE submit a bug report to https://bugs.llvm.org/ and include the crash backtrace.

For quick tries one is used to just not use any compile options.

[Emoun]

Yes, this has been the case for quite some time. Good to have an issue for it, but no ETA on when I can get to it.