diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index e43c9e2708d..0401b9a7f7d 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -748,21 +748,22 @@ static void GetBranchWeights(TerminatorInst *TI, } } -/// Sees if any of the weights are too big for a uint32_t, and halves all the -/// weights if any are. +/// Keep halving the weights until all can fit in uint32_t. static void FitWeights(MutableArrayRef<uint64_t> Weights) { - bool Halve = false; - for (unsigned i = 0; i < Weights.size(); ++i) - if (Weights[i] > UINT_MAX) { - Halve = true; - break; - } + while (true) { + bool Halve = false; + for (unsigned i = 0; i < Weights.size(); ++i) + if (Weights[i] > UINT_MAX) { + Halve = true; + break; + } - if (! Halve) - return; + if (! Halve) + return; - for (unsigned i = 0; i < Weights.size(); ++i) - Weights[i] /= 2; + for (unsigned i = 0; i < Weights.size(); ++i) + Weights[i] /= 2; + } } /// FoldValueComparisonIntoPredecessors - The specified terminator is a value |
