[PATCH] D20482: [LoopUnroll] Enable advanced unrolling analysis by default.
Michael Zolotukhin via llvm-commits
llvm-commits at lists.llvm.org
Mon May 23 12:16:45 PDT 2016
This revision was automatically updated to reflect the committed changes.
Closed by commit rL270478: [LoopUnroll] Enable advanced unrolling analysis by default. (authored by mzolotukhin).
Changed prior to commit:
@@ -1,4 +1,4 @@
-; RUN: opt < %s -S -unroll-threshold=20 -loop-unroll -unroll-allow-partial -unroll-runtime | FileCheck %s
+; RUN: opt < %s -S -unroll-threshold=20 -loop-unroll -unroll-allow-partial -unroll-runtime -unroll-dynamic-cost-savings-discount=0 | FileCheck %s
; The Loop TripCount is 9. However unroll factors 3 or 9 exceed given threshold.
; The test checks that we choose a smaller, power-of-two, unroll count and do not give up on unrolling.
@@ -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"));
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