Reapply fix PR23384 (part 3 of 3) r304824 (was reverted in r305720).
The root cause of reverting was fixed - PR33514.
Summary:
The patch makes instruction count the highest priority for
LSR solution for X86 (previously registers had highest priority).
Reviewers: qcolombet
Differential Revision: http://reviews.llvm.org/D30562
From: Evgeny Stupachenko <evstupac@gmail.com>
<evgeny.v.stupachenko@intel.com>
llvm-svn: 310289
diff --git a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index d353bbd..4491198 100644
--- a/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@ -131,7 +131,7 @@
// The flag adds instruction count to solutions cost comparision.
static cl::opt<bool> InsnsCost(
- "lsr-insns-cost", cl::Hidden, cl::init(false),
+ "lsr-insns-cost", cl::Hidden, cl::init(true),
cl::desc("Add instruction count to a LSR cost model"));
// Flag to choose how to narrow complex lsr solution