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lib/CodeGen/TailDuplicator.cpp
| Show First 20 Lines • Show All 597 Lines • ▼ Show 20 Lines | if (PreRegAlloc && MI.isReturn()) | ||||
| return false; | return false; | ||||
| // Avoid duplicating calls before register allocation. Calls presents a | // Avoid duplicating calls before register allocation. Calls presents a | ||||
| // barrier to register allocation so duplicating them may end up increasing | // barrier to register allocation so duplicating them may end up increasing | ||||
| // spills. | // spills. | ||||
| if (PreRegAlloc && MI.isCall()) | if (PreRegAlloc && MI.isCall()) | ||||
| return false; | return false; | ||||
| if (!MI.isPHI() && !MI.isDebugValue()) | if (!MI.isPHI() && !MI.isMetaInstruction()) | ||||
| InstrCount += 1; | InstrCount += 1; | ||||
| if (InstrCount > MaxDuplicateCount) | if (InstrCount > MaxDuplicateCount) | ||||
| return false; | return false; | ||||
| } | } | ||||
| // Check if any of the successors of TailBB has a PHI node in which the | // Check if any of the successors of TailBB has a PHI node in which the | ||||
| // value corresponding to TailBB uses a subregister. | // value corresponding to TailBB uses a subregister. | ||||
| // If a phi node uses a register paired with a subregister, the actual | // If a phi node uses a register paired with a subregister, the actual | ||||
| ▲ Show 20 Lines • Show All 381 Lines • Show Last 20 Lines | |||||