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Fix reversed logic in getRegsUsed. Rename RegStates to RegsAvailable to

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hopefully forestall similar errors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35362 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2007-03-26 22:23:54 +00:00
parent 0e5444bb20
commit c6b9ef80a8
2 changed files with 23 additions and 23 deletions
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16
include/llvm/CodeGen/RegisterScavenging.h
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@ -47,10 +47,10 @@ class RegScavenger {
///
const TargetRegisterClass *ScavengedRC;
/// RegStates - The current state of all the physical registers immediately
/// RegsAvailable - The current state of all the physical registers immediately
/// before MBBI. One bit per physical register. If bit is set that means it's
/// available, unset means the register is currently being used.
BitVector RegStates;
BitVector RegsAvailable;
public:
RegScavenger()
@ -88,18 +88,18 @@ public:
/// isUsed / isUsed - Test if a register is currently being used.
///
bool isUsed(unsigned Reg) const { return !RegStates[Reg]; }
bool isUnused(unsigned Reg) const { return RegStates[Reg]; }
bool isUsed(unsigned Reg) const { return !RegsAvailable[Reg]; }
bool isUnused(unsigned Reg) const { return RegsAvailable[Reg]; }
/// getRegsUsed - return all registers currently in use in used.
void getRegsUsed(BitVector &used, bool includeReserved);
/// setUsed / setUnused - Mark the state of one or a number of registers.
///
void setUsed(unsigned Reg) { RegStates.reset(Reg); }
void setUsed(BitVector Regs) { RegStates &= ~Regs; }
void setUnused(unsigned Reg) { RegStates.set(Reg); }
void setUnused(BitVector Regs) { RegStates |= Regs; }
void setUsed(unsigned Reg) { RegsAvailable.reset(Reg); }
void setUsed(BitVector Regs) { RegsAvailable &= ~Regs; }
void setUnused(unsigned Reg) { RegsAvailable.set(Reg); }
void setUnused(BitVector Regs) { RegsAvailable |= Regs; }
/// FindUnusedReg - Find a unused register of the specified register class
/// from the specified set of registers. It return 0 is none is found.