No functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45651
91177308-0d34-0410-b5e6-
96231b3b80d8
const unsigned M_BARRIER_FLAG = 1 << 3;
const unsigned M_DELAY_SLOT_FLAG = 1 << 4;
const unsigned M_LOAD_FLAG = 1 << 5;
const unsigned M_BARRIER_FLAG = 1 << 3;
const unsigned M_DELAY_SLOT_FLAG = 1 << 4;
const unsigned M_LOAD_FLAG = 1 << 5;
+
+/// M_STORE_FLAG - This flag is set to any instruction that could possibly
+/// modify memory. Instructions with this flag set are not necessarily simple
+/// store instructions, they may store a modified value based on their operands,
+/// or may not actually modify anything, for example.
const unsigned M_STORE_FLAG = 1 << 6;
const unsigned M_STORE_FLAG = 1 << 6;
const unsigned M_INDIRECT_FLAG = 1 << 7;
const unsigned M_IMPLICIT_DEF_FLAG = 1 << 8;
const unsigned M_INDIRECT_FLAG = 1 << 7;
const unsigned M_IMPLICIT_DEF_FLAG = 1 << 8;
bool isLoad(MachineOpCode Opcode) const {
return get(Opcode).Flags & M_LOAD_FLAG;
}
bool isLoad(MachineOpCode Opcode) const {
return get(Opcode).Flags & M_LOAD_FLAG;
}
+
+ /// isStore - Return true if this instruction could possibly modify memory.
+ /// Instructions with this flag set are not necessarily simple store
+ /// instructions, they may store a modified value based on their operands, or
+ /// may not actually modify anything, for example.
bool isStore(MachineOpCode Opcode) const {
return get(Opcode).Flags & M_STORE_FLAG;
}
bool isStore(MachineOpCode Opcode) const {
return get(Opcode).Flags & M_STORE_FLAG;
}
/// flags.
bool hasUnmodelledSideEffects(MachineInstr *MI) const {
const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
/// flags.
bool hasUnmodelledSideEffects(MachineInstr *MI) const {
const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
- if (!(TID->Flags & M_NEVER_HAS_SIDE_EFFECTS ||
- TID->Flags & M_MAY_HAVE_SIDE_EFFECTS)) return true;
if (TID->Flags & M_NEVER_HAS_SIDE_EFFECTS) return false;
if (TID->Flags & M_NEVER_HAS_SIDE_EFFECTS) return false;
+ if (!(TID->Flags & M_MAY_HAVE_SIDE_EFFECTS)) return true;
return !isReallySideEffectFree(MI); // May have side effects
}
protected:
return !isReallySideEffectFree(MI); // May have side effects
}
protected: