diff options
| author | Matthias Braun <matze@braunis.de> | 2017-05-05 21:09:30 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2017-05-05 21:09:30 +0000 |
| commit | 8940114f61e345ae65e7be9c43a8ed1cfb7f60b8 (patch) | |
| tree | 41648110b3685e3936320b1f361a07015553a990 /llvm/docs | |
| parent | f7ca8fcd6a177c1143591d6b459ff0933f4fb8b6 (diff) | |
| download | bcm5719-llvm-8940114f61e345ae65e7be9c43a8ed1cfb7f60b8.tar.gz bcm5719-llvm-8940114f61e345ae65e7be9c43a8ed1cfb7f60b8.zip | |
MIParser/MIRPrinter: Compute block successors if not explicitely specified
- MIParser: If the successor list is not specified successors will be
added based on basic block operands in the block and possible
fallthrough.
- MIRPrinter: Adds a new `simplify-mir` option, with that option set:
Skip printing of block successor lists in cases where the
parser is guaranteed to reconstruct it. This means we still print the
list if some successor cannot be determined (happens for example for
jump tables), if the successor order changes or branch probabilities
being unequal.
Differential Revision: https://reviews.llvm.org/D31262
llvm-svn: 302289
Diffstat (limited to 'llvm/docs')
| -rw-r--r-- | llvm/docs/MIRLangRef.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/docs/MIRLangRef.rst b/llvm/docs/MIRLangRef.rst index d5e227a2018..b4ca8f2347a 100644 --- a/llvm/docs/MIRLangRef.rst +++ b/llvm/docs/MIRLangRef.rst @@ -78,6 +78,8 @@ Simplifying MIR files The MIR code coming out of ``-stop-after``/``-stop-before`` is very verbose; Tests are more accessible and future proof when simplified: +- Use the ``-simplify-mir`` option with llc. + - Machine function attributes often have default values or the test works just as well with default values. Typical candidates for this are: `alignment:`, `exposesReturnsTwice`, `legalized`, `regBankSelected`, `selected`. |
