Update LiveDebugVariables after live range splitting.
After a virtual register is split, update any debug user variables that resided
in the old register. This ensures that the LiveDebugVariables are still correct
after register allocation.
This may create DBG_VALUE instructions that place a user variable in a register
in parts of the function and in a stack slot in other parts. DwarfDebug
currently doesn't support that.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130998 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveRangeEdit.h b/lib/CodeGen/LiveRangeEdit.h
index 14d227e..db6740c 100644
--- a/lib/CodeGen/LiveRangeEdit.h
+++ b/lib/CodeGen/LiveRangeEdit.h
@@ -18,8 +18,9 @@
#ifndef LLVM_CODEGEN_LIVERANGEEDIT_H
#define LLVM_CODEGEN_LIVERANGEEDIT_H
-#include "llvm/CodeGen/LiveInterval.h"
+#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/CodeGen/LiveInterval.h"
namespace llvm {
@@ -113,6 +114,10 @@
bool empty() const { return size() == 0; }
LiveInterval *get(unsigned idx) const { return newRegs_[idx+firstNew_]; }
+ ArrayRef<LiveInterval*> regs() const {
+ return ArrayRef<LiveInterval*>(newRegs_).slice(firstNew_);
+ }
+
/// FIXME: Temporary accessors until we can get rid of
/// LiveIntervals::AddIntervalsForSpills
SmallVectorImpl<LiveInterval*> *getNewVRegs() { return &newRegs_; }