- Treat a live range defined by an implicit_def as a zero-sized one.

- Eliminate an implicit_def when it's being spilled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49166 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/include/llvm/CodeGen/LiveIntervalAnalysis.h b/include/llvm/CodeGen/LiveIntervalAnalysis.h
index ee35377..2938fca 100644
--- a/include/llvm/CodeGen/LiveIntervalAnalysis.h
+++ b/include/llvm/CodeGen/LiveIntervalAnalysis.h
@@ -394,6 +394,10 @@ namespace llvm {
                           BitVector &RestoreMBBs,
                           std::map<unsigned,std::vector<SRInfo> >&RestoreIdxes);
 
+    /// removeSpilledImpDefs - Remove IMPLICIT_DEF instructions which are being
+    /// spilled.
+    void removeSpilledImpDefs(const LiveInterval &li, VirtRegMap &vrm);
+
     /// rewriteImplicitOps - Rewrite implicit use operands of MI (i.e. uses of
     /// interval on to-be re-materialized operands of MI) with new register.
     void rewriteImplicitOps(const LiveInterval &li,