Re-enable "[LoopUnroll] Enable advanced unrolling analysis by default" one more time.
This reverts commit r270577.
llvm-svn: 270630
diff --git a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
index d167c44..8e65af9 100644
--- a/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopUnrollPass.cpp
@@ -45,18 +45,18 @@
cl::desc("The baseline cost threshold for loop unrolling"));
static cl::opt<unsigned> UnrollPercentDynamicCostSavedThreshold(
- "unroll-percent-dynamic-cost-saved-threshold", cl::Hidden,
+ "unroll-percent-dynamic-cost-saved-threshold", cl::init(50), cl::Hidden,
cl::desc("The percentage of estimated dynamic cost which must be saved by "
"unrolling to allow unrolling up to the max threshold."));
static cl::opt<unsigned> UnrollDynamicCostSavingsDiscount(
- "unroll-dynamic-cost-savings-discount", cl::Hidden,
+ "unroll-dynamic-cost-savings-discount", cl::init(100), cl::Hidden,
cl::desc("This is the amount discounted from the total unroll cost when "
"the unrolled form has a high dynamic cost savings (triggered by "
"the '-unroll-perecent-dynamic-cost-saved-threshold' flag)."));
static cl::opt<unsigned> UnrollMaxIterationsCountToAnalyze(
- "unroll-max-iteration-count-to-analyze", cl::init(0), cl::Hidden,
+ "unroll-max-iteration-count-to-analyze", cl::init(10), cl::Hidden,
cl::desc("Don't allow loop unrolling to simulate more than this number of"
"iterations when checking full unroll profitability"));