See if Reg is defined by an single def instruction of type T Also try to do trivial folding if it's a COPY with same types. Returns null otherwise.
Synopsis
Declared in <llvm/CodeGen/GlobalISel/Utils.h>
template<class T>
T*
getOpcodeDef(
Register Reg,
MachineRegisterInfo const& MRI);Return Value
The defining instruction cast to T, or nullptr.
Parameters
Name |
Description |
Reg |
Virtual register whose defining instruction is inspected. |
MRI |
Register information for the function. |
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