Eliminate the VNInfo::hasPHIKill() flag.

The only real user of the flag was removeCopyByCommutingDef(), and it
has been switched to LiveIntervals::hasPHIKill().

All the code changed by this patch was only concerned with computing and
propagating the flag.

llvm-svn: 161255

1 files changed, 1 insertions, 13 deletions

diff --git a/llvm/include/llvm/CodeGen/LiveInterval.h b/llvm/include/llvm/CodeGen/LiveInterval.h
index b95272273b1..8e31792f014 100644
--- a/llvm/include/llvm/CodeGen/LiveInterval.h
+++ b/llvm/include/llvm/CodeGen/LiveInterval.h
@@ -42,8 +42,7 @@ namespace llvm {
   class VNInfo {
   private:
     enum {
-      HAS_PHI_KILL    = 1,
-      IS_UNUSED       = 1 << 1
+      IS_UNUSED       = 1
     };
 
     unsigned char flags;
@@ -82,17 +81,6 @@ namespace llvm {
       flags = (flags | VNI->flags) & ~IS_UNUSED;
     }
 
-    /// Returns true if one or more kills are PHI nodes.
-    /// Obsolete, do not use!
-    bool hasPHIKill() const { return flags & HAS_PHI_KILL; }
-    /// Set the PHI kill flag on this value.
-    void setHasPHIKill(bool hasKill) {
-      if (hasKill)
-        flags |= HAS_PHI_KILL;
-      else
-        flags &= ~HAS_PHI_KILL;
-    }
-
     /// Returns true if this value is defined by a PHI instruction (or was,
     /// PHI instrucions may have been eliminated).
     /// PHI-defs begin at a block boundary, all other defs begin at register or