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| author | dim <dim@FreeBSD.org> | 2011-06-12 15:42:51 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2011-06-12 15:42:51 +0000 |
| commit | ece02cd5829cea836e9365b0845a8ef042d17b0a (patch) | |
| tree | b3032e51d630e8070e9e08d6641648f195316a80 /lib/CodeGen/AllocationOrder.h | |
| parent | 2b066988909948dc3d53d01760bc2d71d32f3feb (diff) | |
| download | FreeBSD-src-ece02cd5829cea836e9365b0845a8ef042d17b0a.zip FreeBSD-src-ece02cd5829cea836e9365b0845a8ef042d17b0a.tar.gz | |
Vendor import of llvm trunk r132879:
http://llvm.org/svn/llvm-project/llvm/trunk@132879
Diffstat (limited to 'lib/CodeGen/AllocationOrder.h')
| -rw-r--r-- | lib/CodeGen/AllocationOrder.h | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/lib/CodeGen/AllocationOrder.h b/lib/CodeGen/AllocationOrder.h index 61fd8f8..d1e48a1 100644 --- a/lib/CodeGen/AllocationOrder.h +++ b/lib/CodeGen/AllocationOrder.h @@ -19,15 +19,16 @@ namespace llvm { -class BitVector; +class RegisterClassInfo; class VirtRegMap; class AllocationOrder { const unsigned *Begin; const unsigned *End; const unsigned *Pos; - const BitVector &Reserved; + const RegisterClassInfo &RCI; unsigned Hint; + bool OwnedBegin; public: /// AllocationOrder - Create a new AllocationOrder for VirtReg. @@ -37,12 +38,28 @@ public: /// TargetRegisterInfo::getReservedRegs(). AllocationOrder(unsigned VirtReg, const VirtRegMap &VRM, - const BitVector &ReservedRegs); + const RegisterClassInfo &RegClassInfo); + + ~AllocationOrder(); /// next - Return the next physical register in the allocation order, or 0. /// It is safe to call next again after it returned 0. /// It will keep returning 0 until rewind() is called. - unsigned next(); + unsigned next() { + // First take the hint. + if (!Pos) { + Pos = Begin; + if (Hint) + return Hint; + } + // Then look at the order from TRI. + while (Pos != End) { + unsigned Reg = *Pos++; + if (Reg != Hint) + return Reg; + } + return 0; + } /// rewind - Start over from the beginning. void rewind() { Pos = 0; } |
