diff options
Diffstat (limited to 'lib/CodeGen/RegAllocBase.h')
-rw-r--r-- | lib/CodeGen/RegAllocBase.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/lib/CodeGen/RegAllocBase.h b/lib/CodeGen/RegAllocBase.h index 1534c0d7eb..f4ca972738 100644 --- a/lib/CodeGen/RegAllocBase.h +++ b/lib/CodeGen/RegAllocBase.h @@ -94,6 +94,10 @@ protected: LiveIntervals *lis_; LIUArray physReg2liu_; + // Current queries, one per physreg. They must be reinitialized each time we + // query on a new live virtual register. + OwningArrayPtr<LiveIntervalUnion::Query> queries_; + RegAllocBase(): tri_(0), vrm_(0), lis_(0) {} virtual ~RegAllocBase() {} @@ -120,9 +124,15 @@ protected: virtual void releaseMemory(); // Helper for checking interference between a live virtual register and a - // physical register, including all its register aliases. - bool checkPhysRegInterference(LiveIntervalUnion::Query &query, unsigned preg); - + // physical register, including all its register aliases. If an interference + // exists, return the interfering register, which may be preg or an alias. + unsigned checkPhysRegInterference(LiveInterval& lvr, unsigned preg); + + // Helper that spills all live virtual registers currently unified under preg + // that interfere with the most recently queried lvr. + void spillInterferences(unsigned preg, + SmallVectorImpl<LiveInterval*> &splitLVRs); + private: void seedLiveVirtRegs(LiveVirtRegQueue &lvrQ); }; |