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-rw-r--r--llvm/utils/PerfectShuffle/PerfectShuffle.cpp4
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/utils/PerfectShuffle/PerfectShuffle.cpp b/llvm/utils/PerfectShuffle/PerfectShuffle.cpp
index c2abe9b6116..b19dd0d39ac 100644
--- a/llvm/utils/PerfectShuffle/PerfectShuffle.cpp
+++ b/llvm/utils/PerfectShuffle/PerfectShuffle.cpp
@@ -381,7 +381,9 @@ int main() {
// CostSat - The cost of this operation saturated to two bits.
unsigned CostSat = ShufTab[i].Cost;
- if (CostSat > 3) CostSat = 3;
+ if (CostSat > 4) CostSat = 4;
+ if (CostSat == 0) CostSat = 1;
+ --CostSat; // Cost is now between 0-3.
unsigned OpNum = ShufTab[i].Op ? ShufTab[i].Op->OpNum : 0;
assert(OpNum < 16 && "Too few bits to encode operation!");
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