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Charge a formula for explicit multiplies on scaled registers too,
author
Dan Gohman
<gohman@apple.com>
Thu, 7 Oct 2010 23:41:58 +0000
(23:41 +0000)
committer
Dan Gohman
<gohman@apple.com>
Thu, 7 Oct 2010 23:41:58 +0000
(23:41 +0000)
not just base registers.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116010
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/Transforms/Scalar/LoopStrengthReduce.cpp
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diff --git
a/lib/Transforms/Scalar/LoopStrengthReduce.cpp
b/lib/Transforms/Scalar/LoopStrengthReduce.cpp
index 4298b1c2e38c1dc72f19dd3b8cf7125acec0a6f4..b292ffec887e79cc0c309b27197e0d3638210586 100644
(file)
--- a/
lib/Transforms/Scalar/LoopStrengthReduce.cpp
+++ b/
lib/Transforms/Scalar/LoopStrengthReduce.cpp
@@
-728,6
+728,9
@@
void Cost::RateRegister(const SCEV *Reg,
(isa<SCEVUnknown>(cast<SCEVAddRecExpr>(Reg)->getStart()) ||
isa<SCEVConstant>(cast<SCEVAddRecExpr>(Reg)->getStart()))))
++SetupCost;
+
+ NumIVMuls += isa<SCEVMulExpr>(Reg) &&
+ Reg->hasComputableLoopEvolution(L);
}
/// RatePrimaryRegister - Record this register in the set. If we haven't seen it
@@
-762,9
+765,6
@@
void Cost::RateFormula(const Formula &F,
return;
}
RatePrimaryRegister(BaseReg, Regs, L, SE, DT);
-
- NumIVMuls += isa<SCEVMulExpr>(BaseReg) &&
- BaseReg->hasComputableLoopEvolution(L);
}
if (F.BaseRegs.size() > 1)