diff options
Diffstat (limited to 'lib/Target/AArch64/AArch64PBQPRegAlloc.h')
-rw-r--r-- | lib/Target/AArch64/AArch64PBQPRegAlloc.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/lib/Target/AArch64/AArch64PBQPRegAlloc.h b/lib/Target/AArch64/AArch64PBQPRegAlloc.h new file mode 100644 index 0000000..4f656f9 --- /dev/null +++ b/lib/Target/AArch64/AArch64PBQPRegAlloc.h @@ -0,0 +1,38 @@ +//===-- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints -------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H +#define LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H + +#include "llvm/ADT/SetVector.h" +#include "llvm/CodeGen/PBQPRAConstraint.h" + +namespace llvm { + +/// Add the accumulator chaining constraint to a PBQP graph +class A57ChainingConstraint : public PBQPRAConstraint { +public: + // Add A57 specific constraints to the PBQP graph. + void apply(PBQPRAGraph &G) override; + +private: + SmallSetVector<unsigned, 32> Chains; + const TargetRegisterInfo *TRI; + + // Add the accumulator chaining constraint, inside the chain, i.e. so that + // parity(Rd) == parity(Ra). + // \return true if a constraint was added + bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); + + // Add constraints between existing chains + void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra); +}; +} + +#endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H |