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Allow BB duplication threshold to be adjusted through JumpThreading's ctor

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- BB duplication may not be desired on targets where there is no or small
  branch penalty and code duplication needs restrict control.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218375 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Liao
2014-09-24 04:59:06 +00:00
parent bfb2b180bf
commit 35fdc092e0
2 changed files with 13 additions and 9 deletions
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5
include/llvm/Transforms/Scalar.h
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@@ -206,9 +206,10 @@ FunctionPass *createReassociatePass();
//===----------------------------------------------------------------------===//
//
// JumpThreading - Thread control through mult-pred/multi-succ blocks where some
// preds always go to some succ.
// preds always go to some succ. Thresholds other than minus one override the
// internal BB duplication default threshold.
//
FunctionPass *createJumpThreadingPass();
FunctionPass *createJumpThreadingPass(int Threshold = -1);
//===----------------------------------------------------------------------===//
//