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Early CFG simplification can fold conditionals down to selects, which is often a good thing, but it can also

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hide jump threading opportunities by turning control flow into data flow.  Run an early JumpThreading pass
(adds approximately an additional 1% to optimization time on SPEC), allowing it to get a shot at these cases
first.  Fixes <rdar://problem/8447345>.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115099 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2010-09-29 22:57:02 +00:00
parent 3881cb7a5d
commit 235859d66c
1 changed files with 1 additions and 0 deletions
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include/llvm/Support/StandardPasses.h
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@ -104,6 +104,7 @@ namespace llvm {
PM->add(createDeadArgEliminationPass()); // Dead argument elimination
}
PM->add(createInstructionCombiningPass()); // Clean up after IPCP & DAE
PM->add(createJumpThreadingPass()); // Clean up after IPCP & DAE
PM->add(createCFGSimplificationPass()); // Clean up after IPCP & DAE
// Start of CallGraph SCC passes.