diff options
Diffstat (limited to 'include/llvm/CodeGen/StackMaps.h')
-rw-r--r-- | include/llvm/CodeGen/StackMaps.h | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/include/llvm/CodeGen/StackMaps.h b/include/llvm/CodeGen/StackMaps.h index e343980..4e48afe 100644 --- a/include/llvm/CodeGen/StackMaps.h +++ b/include/llvm/CodeGen/StackMaps.h @@ -81,6 +81,52 @@ public: unsigned getNextScratchIdx(unsigned StartIdx = 0) const; }; +/// MI-level Statepoint operands +/// +/// Statepoint operands take the form: +/// <num call arguments>, <call target>, [call arguments], +/// <StackMaps::ConstantOp>, <flags>, +/// <StackMaps::ConstantOp>, <num other args>, [other args], +/// [gc values] +class StatepointOpers { +private: + enum { + NCallArgsPos = 0, + CallTargetPos = 1 + }; + +public: + explicit StatepointOpers(const MachineInstr *MI): + MI(MI) { } + + /// Get starting index of non call related arguments + /// (statepoint flags, vm state and gc state). + unsigned getVarIdx() const { + return MI->getOperand(NCallArgsPos).getImm() + 2; + } + + /// Returns the index of the operand containing the number of non-gc non-call + /// arguments. + unsigned getNumVMSArgsIdx() const { + return getVarIdx() + 3; + } + + /// Returns the number of non-gc non-call arguments attached to the + /// statepoint. Note that this is the number of arguments, not the number of + /// operands required to represent those arguments. + unsigned getNumVMSArgs() const { + return MI->getOperand(getNumVMSArgsIdx()).getImm(); + } + + /// Returns the target of the underlying call. + const MachineOperand &getCallTarget() const { + return MI->getOperand(CallTargetPos); + } + +private: + const MachineInstr *MI; +}; + class StackMaps { public: struct Location { @@ -132,6 +178,9 @@ public: /// \brief Generate a stackmap record for a patchpoint instruction. void recordPatchPoint(const MachineInstr &MI); + /// \brief Generate a stackmap record for a statepoint instruction. + void recordStatepoint(const MachineInstr &MI); + /// If there is any stack map data, create a stack map section and serialize /// the map info into it. This clears the stack map data structures /// afterwards. @@ -139,7 +188,6 @@ public: private: static const char *WSMP; - typedef SmallVector<Location, 8> LocationVec; typedef SmallVector<LiveOutReg, 8> LiveOutVec; typedef MapVector<uint64_t, uint64_t> ConstantPool; |