From b696c36fcd94339787d979c4ed6fb8cc9b83afdd Mon Sep 17 00:00:00 2001 From: Nadav Rotem Date: Wed, 9 Jan 2013 01:15:42 +0000 Subject: Cost Model: Move the 'max unroll factor' variable to the TTI and add initial Cost Model support on ARM. llvm-svn: 171928 --- llvm/lib/Target/X86/X86TargetTransformInfo.cpp | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'llvm/lib/Target/X86/X86TargetTransformInfo.cpp') diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp index 9cc1b180e97..6ab08cbd129 100644 --- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp +++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp @@ -75,7 +75,6 @@ public: /// \name Scalar TTI Implementations /// @{ - virtual PopcntSupportKind getPopcntSupport(unsigned TyWidth) const; /// @} @@ -84,6 +83,7 @@ public: /// @{ virtual unsigned getNumberOfRegisters(bool Vector) const; + virtual unsigned getMaximumUnrollFactor() const; virtual unsigned getArithmeticInstrCost(unsigned Opcode, Type *Ty) const; virtual unsigned getShuffleCost(ShuffleKind Kind, Type *Tp, int Index, Type *SubTp) const; @@ -156,7 +156,6 @@ FindInConvertTable(const X86TypeConversionCostTblEntry *Tbl, unsigned len, return -1; } - X86TTI::PopcntSupportKind X86TTI::getPopcntSupport(unsigned TyWidth) const { assert(isPowerOf2_32(TyWidth) && "Ty width must be power of 2"); // TODO: Currently the __builtin_popcount() implementation using SSE3 @@ -171,6 +170,18 @@ unsigned X86TTI::getNumberOfRegisters(bool Vector) const { return 8; } +unsigned X86TTI::getMaximumUnrollFactor() const { + if (ST->isAtom()) + return 1; + + // Sandybridge and Haswell have multiple execution ports and pipelined + // vector units. + if (ST->hasAVX()) + return 4; + + return 2; +} + unsigned X86TTI::getArithmeticInstrCost(unsigned Opcode, Type *Ty) const { // Legalize the type. std::pair LT = TLI->getTypeLegalizationCost(Ty); -- cgit v1.2.3