From 6bf4f676413b8f7d97aaff289997aab344180957 Mon Sep 17 00:00:00 2001 From: Arnold Schwaighofer Date: Thu, 4 Apr 2013 23:26:21 +0000 Subject: CostModel: Add parameter to instruction cost to further classify operand values On certain architectures we can support efficient vectorized version of instructions if the operand value is uniform (splat) or a constant scalar. An example of this is a vector shift on x86. We can efficiently support for (i = 0 ; i < ; i += 4) w[0:3] = v[0:3] << <2, 2, 2, 2> but not for (i = 0; i < ; i += 4) w[0:3] = v[0:3] << x[0:3] This patch adds a parameter to getArithmeticInstrCost to further qualify operand values as uniform or uniform constant. Targets can then choose to return a different cost for instructions with such operand values. A follow-up commit will test this feature on x86. radar://13576547 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178807 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Analysis/TargetTransformInfo.cpp | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'lib/Analysis/TargetTransformInfo.cpp') diff --git a/lib/Analysis/TargetTransformInfo.cpp b/lib/Analysis/TargetTransformInfo.cpp index 976cd87321..64f8e96884 100644 --- a/lib/Analysis/TargetTransformInfo.cpp +++ b/lib/Analysis/TargetTransformInfo.cpp @@ -150,8 +150,10 @@ unsigned TargetTransformInfo::getMaximumUnrollFactor() const { } unsigned TargetTransformInfo::getArithmeticInstrCost(unsigned Opcode, - Type *Ty) const { - return PrevTTI->getArithmeticInstrCost(Opcode, Ty); + Type *Ty, + OperandValueKind Op1Info, + OperandValueKind Op2Info) const { + return PrevTTI->getArithmeticInstrCost(Opcode, Ty, Op1Info, Op2Info); } unsigned TargetTransformInfo::getShuffleCost(ShuffleKind Kind, Type *Tp, @@ -495,7 +497,8 @@ struct NoTTI : ImmutablePass, TargetTransformInfo { return 1; } - unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty) const { + unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty, OperandValueKind, + OperandValueKind) const { return 1; } -- cgit v1.2.3