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Author SHA1 Message Date
Tobias Grosser 87dcd46aa7 [tests] Make sure tests do not end in 'unreachable' - Part II 
There is no point in optimizing unreachable code, hence our test cases should
always return.

This commit is part of a series that makes Polly more robust on the presence of
unreachables.

llvm-svn: 297150
 2017-03-07 15:23:30 +00:00
Tobias Grosser 2d3d4ec860 executeScopConditionally: Introduce special exiting block 
When introducing separate control flow for the original and optimized code we
introduce now a special 'ExitingBlock':

      \   /
    EnteringBB
        |
    SplitBlock---------\
   _____|_____         |
  /  EntryBB  \    StartBlock
  |  (region) |        |
  \_ExitingBB_/   ExitingBlock
        |              |
    MergeBlock---------/
        |
      ExitBB
      /    \

This 'ExitingBlock' contains code such as the final_reloads for scalars, which
previously were just added to whichever statement/loop_exit/branch-merge block
had been generated last. Having an explicit basic block makes it easier to
find these constructs when looking at the CFG.

llvm-svn: 255107
 2015-12-09 11:38:22 +00:00
Tobias Grosser 4d935cd9aa tests: Add test case forgotten in 251191 
llvm-svn: 251228
 2015-10-25 10:55:40 +00:00