diff options
Diffstat (limited to 'contrib/llvm/include/llvm/CodeGen/MachineInstr.h')
-rw-r--r-- | contrib/llvm/include/llvm/CodeGen/MachineInstr.h | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/contrib/llvm/include/llvm/CodeGen/MachineInstr.h b/contrib/llvm/include/llvm/CodeGen/MachineInstr.h index 65093d7e7ad6..27756abf3f54 100644 --- a/contrib/llvm/include/llvm/CodeGen/MachineInstr.h +++ b/contrib/llvm/include/llvm/CodeGen/MachineInstr.h @@ -420,6 +420,12 @@ public: return hasProperty(MCID::Bitcast, Type); } + /// isSelect - Return true if this instruction is a select instruction. + /// + bool isSelect(QueryType Type = IgnoreBundle) const { + return hasProperty(MCID::Select, Type); + } + /// isNotDuplicable - Return true if this instruction cannot be safely /// duplicated. For example, if the instruction has a unique labels attached /// to it, duplicating it would cause multiple definition errors. @@ -635,6 +641,30 @@ public: getOperand(0).getSubReg() == getOperand(1).getSubReg(); } + /// isTransient - Return true if this is a transient instruction that is + /// either very likely to be eliminated during register allocation (such as + /// copy-like instructions), or if this instruction doesn't have an + /// execution-time cost. + bool isTransient() const { + switch(getOpcode()) { + default: return false; + // Copy-like instructions are usually eliminated during register allocation. + case TargetOpcode::PHI: + case TargetOpcode::COPY: + case TargetOpcode::INSERT_SUBREG: + case TargetOpcode::SUBREG_TO_REG: + case TargetOpcode::REG_SEQUENCE: + // Pseudo-instructions that don't produce any real output. + case TargetOpcode::IMPLICIT_DEF: + case TargetOpcode::KILL: + case TargetOpcode::PROLOG_LABEL: + case TargetOpcode::EH_LABEL: + case TargetOpcode::GC_LABEL: + case TargetOpcode::DBG_VALUE: + return true; + } + } + /// getBundleSize - Return the number of instructions inside the MI bundle. unsigned getBundleSize() const; @@ -912,12 +942,12 @@ private: /// RemoveRegOperandsFromUseLists - Unlink all of the register operands in /// this instruction from their respective use lists. This requires that the /// operands already be on their use lists. - void RemoveRegOperandsFromUseLists(); + void RemoveRegOperandsFromUseLists(MachineRegisterInfo&); /// AddRegOperandsToUseLists - Add all of the register operands in /// this instruction from their respective use lists. This requires that the /// operands not be on their use lists yet. - void AddRegOperandsToUseLists(MachineRegisterInfo &RegInfo); + void AddRegOperandsToUseLists(MachineRegisterInfo&); /// hasPropertyInBundle - Slow path for hasProperty when we're dealing with a /// bundle. |