Changes in directory llvm/include/llvm/CodeGen:
MachineFunction.h updated: 1.65 -> 1.66
---
Log message:
Change UsedPhysRegs from array bool to BitVector to save some space. Setting /
getting its states now go through MachineFunction.
---
Diffs of the changes: (+12 -20)
MachineFunction.h | 32 ++++++++++++--------------------
1 files changed, 12 insertions(+), 20 deletions(-)
Index: llvm/include/llvm/CodeGen/MachineFunction.h
diff -u llvm/include/llvm/CodeGen/MachineFunction.h:1.65
llvm/include/llvm/CodeGen/MachineFunction.h:1.66
--- llvm/include/llvm/CodeGen/MachineFunction.h:1.65 Wed Feb 14 20:55:51 2007
+++ llvm/include/llvm/CodeGen/MachineFunction.h Wed Apr 25 17:10:09 2007
@@ -21,6 +21,7 @@
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/Support/Annotation.h"
+#include "llvm/ADT/BitVector.h"
namespace llvm {
@@ -103,12 +104,12 @@
// numbered and this vector keeps track of the mapping from ID's to MBB's.
std::vector<MachineBasicBlock*> MBBNumbering;
- /// UsedPhysRegs - This is a new[]'d array of bools that is computed and set
- /// by the register allocator, and must be kept up to date by passes that run
- /// after register allocation (though most don't modify this). This is used
+ /// UsedPhysRegs - This is a bit vector that is computed and set by the
+ /// register allocator, and must be kept up to date by passes that run after
+ /// register allocation (though most don't modify this). This is used
/// so that the code generator knows which callee save registers to save and
/// for other target specific uses.
- bool *UsedPhysRegs;
+ BitVector UsedPhysRegs;
/// LiveIns/LiveOuts - Keep track of the physical registers that are
/// livein/liveout of the function. Live in values are typically arguments
in
@@ -170,26 +171,17 @@
return const_cast<MachineFunction*>(this)->getInfo<Ty>();
}
- /// setUsedPhysRegs - The register allocator should call this to initialized
- /// the UsedPhysRegs set. This should be passed a new[]'d array with entries
- /// for all of the physical registers that the target supports. Each array
- /// entry should be set to true iff the physical register is used within the
- /// function.
- void setUsedPhysRegs(bool *UPR) { UsedPhysRegs = UPR; }
-
- /// getUsedPhysregs - This returns the UsedPhysRegs array. This returns null
- /// before register allocation.
- bool *getUsedPhysregs() { return UsedPhysRegs; }
- const bool *getUsedPhysregs() const { return UsedPhysRegs; }
-
/// isPhysRegUsed - Return true if the specified register is used in this
/// function. This only works after register allocation.
bool isPhysRegUsed(unsigned Reg) const { return UsedPhysRegs[Reg]; }
- /// changePhyRegUsed - This method allows code that runs after register
- /// allocation to keep the PhysRegsUsed array up-to-date.
- void changePhyRegUsed(unsigned Reg, bool State) { UsedPhysRegs[Reg] = State;
}
-
+ /// setPhysRegUsed - Mark the specified register used in this function.
+ /// This should only be called during and after register allocation.
+ void setPhysRegUsed(unsigned Reg) { UsedPhysRegs[Reg] = true; }
+
+ /// setPhysRegUnused - Mark the specified register unused in this function.
+ /// This should only be called during and after register allocation.
+ void setPhysRegUnused(unsigned Reg) { UsedPhysRegs[Reg] = false; }
// LiveIn/LiveOut management methods.
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