A pass that combines instructions to form fewer, simpler instructions.
Declared in <llvm/Transforms/InstCombine/InstCombine.h>
class InstCombinePass
: public OptionalPassInfoMixin<InstCombinePass>This pass does not modify the CFG, and has a tendency to make instructions dead, so a subsequent DCE pass is useful. For example, it combines: %Y = add int 1, %X %Z = add int 1, %Y into: %Z = add int 2, %X
| Name | Description |
|---|---|
OptionalPassInfoMixin<InstCombinePass> | A CRTP mix-in for passes that can be skipped. |
| Name | Description |
|---|---|
InstCombinePass [constructor] | Construct an InstCombine pass with the given options. |
printPipeline | Print this pass's pipeline representation to OS. |
run | Run instruction combining over the function. |
| Name | Description |
|---|---|
isRequired | Return false; optional passes may be skipped. |