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teach simplify-cfg to merge blocks connected by an uncond branch, when

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the dest has no other predecessors.  This fires 6926 times on the stdlib.


Swift SVN r9794
This commit is contained in:
Chris Lattner
2013-10-30 16:48:59 +00:00
parent cb6cf87f1e
commit 03e7b756d0
5 changed files with 123 additions and 31 deletions
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4
include/swift/SIL/SILBasicBlock.h
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@@ -121,6 +121,10 @@ public:
ArrayRef<SILArgument*> getBBArgs() const { return BBArgList; }
unsigned getNumBBArg() const { return BBArgList.size(); }
const SILArgument *getBBArg(unsigned i) const { return BBArgList[i]; }
SILArgument *getBBArg(unsigned i) { return BBArgList[i]; }
/// \brief Remove all block arguments.
void dropAllArgs() { BBArgList.clear(); }