From dde3a9abc3c44ccc9cbf0c713f735d23afbcf301 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Sat, 9 Apr 2005 15:22:53 +0000 Subject: [PATCH] add routines to track the livein/out set for a function git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21179 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/CodeGen/MachineFunction.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h index 34685dd720c..1121fd04803 100644 --- a/include/llvm/CodeGen/MachineFunction.h +++ b/include/llvm/CodeGen/MachineFunction.h @@ -105,6 +105,11 @@ class MachineFunction : private Annotation { /// for other target specific uses. bool *UsedPhysRegs; + /// LiveIns/LiveOuts - Keep track of the physical registers that are + /// livein/liveout of the function. Live in values are typically arguments in + /// registers, live out values are typically return values in registers. + std::vector LiveIns, LiveOuts; + public: MachineFunction(const Function *Fn, const TargetMachine &TM); ~MachineFunction(); @@ -167,6 +172,22 @@ public: /// allocation to keep the PhysRegsUsed array up-to-date. void changePhyRegUsed(unsigned Reg, bool State) { UsedPhysRegs[Reg] = State; } + + // LiveIn/LiveOut management methods. + + /// addLiveIn/Out - Add the specified register as a live in/out. Note that it + /// is an error to add the same register to the same set more than once. + void addLiveIn(unsigned Reg) { LiveIns.push_back(Reg); } + void addLiveOut(unsigned Reg) { LiveOuts.push_back(Reg); } + + // Iteration support for live in/out sets. These sets are kept in sorted + // order by their register number. + typedef std::vector::const_iterator liveinout_iterator; + liveinout_iterator livein_begin() const { return LiveIns.begin(); } + liveinout_iterator livein_end() const { return LiveIns.end(); } + liveinout_iterator liveout_begin() const { return LiveOuts.begin(); } + liveinout_iterator liveout_end() const { return LiveOuts.end(); } + /// getBlockNumbered - MachineBasicBlocks are automatically numbered when they /// are inserted into the machine function. The block number for a machine /// basic block can be found by using the MBB::getBlockNumber method, this