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| author | Nadav Rotem <nrotem@apple.com> | 2013-11-10 04:13:31 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-11-10 04:13:31 +0000 |
| commit | 5ba1c6ced8071108c5c62f6ccb4450e392d94e1d (patch) | |
| tree | eb037cd13a1e4ee5ab107cd9ed9eb5ea95c943fd /llvm/lib/Transforms/Utils/SimplifyCFG.cpp | |
| parent | b12f2f3b6043fc5fdf5b22d12dc73a2ea100911b (diff) | |
| download | bcm5719-llvm-5ba1c6ced8071108c5c62f6ccb4450e392d94e1d.tar.gz bcm5719-llvm-5ba1c6ced8071108c5c62f6ccb4450e392d94e1d.zip | |
SimplifyCFG has a heuristics for out-of-order processors that decides when it is worthwhile to merge branches. It tries to estimate if the operands of the instruction that we want to hoist are ready. This commit marks function arguments as 'ready' because they require no calculation. This boosts libquantum and a few other workloads from the testsuite.
llvm-svn: 194346
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 1398697dc55..d36d9dc1b96 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -2096,7 +2096,7 @@ bool llvm::FoldBranchToCommonDest(BranchInst *BI) { for (Instruction::op_iterator OI = BonusInst->op_begin(), OE = BonusInst->op_end(); OI != OE; ++OI) { Value *V = *OI; - if (!isa<Constant>(V)) + if (!isa<Constant>(V) && !isa<Argument>(V)) UsedValues.insert(V); } |
