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Simplify the tracking of used physregs to a bulk bitor followed by a transitive

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closure after allocating all blocks.

Add a few more test cases for -regalloc=fast.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103500 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-05-11 20:30:28 +00:00
parent d42718080f
commit 82b07dc499
5 changed files with 29 additions and 6 deletions
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11
include/llvm/CodeGen/MachineRegisterInfo.h
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@@ -229,11 +229,18 @@ public:
/// 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; }
/// addPhysRegsUsed - Mark the specified registers used in this function.
/// This should only be called during and after register allocation.
void addPhysRegsUsed(const BitVector &Regs) { UsedPhysRegs |= Regs; }
/// 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; }
/// closePhysRegsUsed - Expand UsedPhysRegs to its transitive closure over
/// subregisters. That means that if R is used, so are all subregisters.
void closePhysRegsUsed(const TargetRegisterInfo&);
//===--------------------------------------------------------------------===//
// LiveIn/LiveOut Management