commit 857c4e01f85601cf2084adb860616256ee47c177
author Lang Hames <lhames@gmail.com> Wed Jun 17 21:01:20 2009 +0000
committer Lang Hames <lhames@gmail.com> Wed Jun 17 21:01:20 2009 +0000
tree a5208397ae299b8b8742bf4cfaca34e3db192601
parent 559254b69774d751742038309e15aa8b14a8797d

VNInfo cleanup.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73634 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/RegAllocLinearScan.cpp

diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index ec956c2..f7f5dc7 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -358,7 +358,7 @@
     return Reg;
 
   VNInfo *vni = cur.begin()->valno;
-  if (!vni->def || vni->def == ~1U || vni->def == ~0U)
+  if (!vni->def || vni->isUnused() || !vni->isDefAccurate())
     return Reg;
   MachineInstr *CopyMI = li_->getInstructionFromIndex(vni->def);
   unsigned SrcReg, DstReg, SrcSubReg, DstSubReg, PhysReg;
@@ -745,7 +745,7 @@
   if (SI.hasAtLeastOneValue())
     VNI = SI.getValNumInfo(0);
   else
-    VNI = SI.getNextValue(~0U, 0, ls_->getVNInfoAllocator());
+    VNI = SI.getNextValue(0, 0, false, ls_->getVNInfoAllocator());
 
   LiveInterval &RI = li_->getInterval(cur->reg);
   // FIXME: This may be overly conservative.
@@ -921,7 +921,7 @@
   // one, e.g. X86::mov32to32_. These move instructions are not coalescable.
   if (!vrm_->getRegAllocPref(cur->reg) && cur->hasAtLeastOneValue()) {
     VNInfo *vni = cur->begin()->valno;
-    if (vni->def && vni->def != ~1U && vni->def != ~0U) {
+    if (vni->def && !vni->isUnused() && vni->isDefAccurate()) {
       MachineInstr *CopyMI = li_->getInstructionFromIndex(vni->def);
       unsigned SrcReg, DstReg, SrcSubReg, DstSubReg;
       if (CopyMI &&