Add VirtRegMap::rewrite() and use it in the new register allocators.
The rewriter works almost identically to -rewriter=trivial, except it also
eliminates any identity copies.
This makes the new register allocators independent of VirtRegRewriter.cpp which
will be going away at the same time as RegAllocLinearScan.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125967 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/VirtRegMap.h b/lib/CodeGen/VirtRegMap.h
index cbc96bb..a43ac5f 100644
--- a/lib/CodeGen/VirtRegMap.h
+++ b/lib/CodeGen/VirtRegMap.h
@@ -35,6 +35,7 @@
class TargetInstrInfo;
class TargetRegisterInfo;
class raw_ostream;
+ class SlotIndexes;
class VirtRegMap : public MachineFunctionPass {
public:
@@ -493,6 +494,13 @@
return 0;
}
+ /// rewrite - Rewrite all instructions in MF to use only physical registers
+ /// by mapping all virtual register operands to their assigned physical
+ /// registers.
+ ///
+ /// @param Indexes Optionally remove deleted instructions from indexes.
+ void rewrite(SlotIndexes *Indexes);
+
void print(raw_ostream &OS, const Module* M = 0) const;
void dump() const;
};