Drop the REDEF_BY_EC VNInfo flag.

A live range that has an early clobber tied redef now looks like a
normal tied redef, except the early clobber def uses the early clobber
slot.

This is enough to handle any strange interference problems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149769 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 14 deletions

diff --git a/include/llvm/CodeGen/LiveInterval.h b/include/llvm/CodeGen/LiveInterval.h
index 96f1548..a6008ab 100644
--- a/include/llvm/CodeGen/LiveInterval.h
+++ b/include/llvm/CodeGen/LiveInterval.h
@@ -43,9 +43,8 @@ namespace llvm {
   private:
     enum {
       HAS_PHI_KILL    = 1,
-      REDEF_BY_EC     = 1 << 1,
-      IS_PHI_DEF      = 1 << 2,
-      IS_UNUSED       = 1 << 3
+      IS_PHI_DEF      = 1 << 1,
+      IS_UNUSED       = 1 << 2
     };
 
     unsigned char flags;
@@ -95,17 +94,6 @@ namespace llvm {
         flags &= ~HAS_PHI_KILL;
     }
 
-    /// Returns true if this value is re-defined by an early clobber somewhere
-    /// during the live range.
-    bool hasRedefByEC() const { return flags & REDEF_BY_EC; }
-    /// Set the "redef by early clobber" flag on this value.
-    void setHasRedefByEC(bool hasRedef) {
-      if (hasRedef)
-        flags |= REDEF_BY_EC;
-      else
-        flags &= ~REDEF_BY_EC;
-    }
-
     /// Returns true if this value is defined by a PHI instruction (or was,
     /// PHI instrucions may have been eliminated).
     bool isPHIDef() const { return flags & IS_PHI_DEF; }