Specify how many cycles after issue a use may read its registers early.
Synopsis
Declared in <llvm/MC/MCSchedule.h>
struct MCReadAdvanceEntry;Description
This effectively reduces the write's latency. Here we allow negative cycles for corner cases where latency increases. This rule only applies when the entry's WriteResource matches the write's WriteResource.
MCReadAdvanceEntries are sorted first by operand index (UseIdx), then by WriteResourceIdx.
Member Functions
Name |
Description |
Return true if this read‐advance entry equals |
Data Members
Name |
Description |
Number of cycles of read advance (may be negative). |
|
Operand index of the use that may read early. |
|
Write resource ID that this advance applies to. |
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