vendor/llvm/llvm-trunk-r306325

1 files changed, 23 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 236e513bec23..13b4f9ab962d 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -292,6 +292,29 @@ unsigned PPCInstrInfo::isLoadFromStackSlot(const MachineInstr &MI,
   return 0;
 }
 
+// For opcodes with the ReMaterializable flag set, this function is called to
+// verify the instruction is really rematable.  
+bool PPCInstrInfo::isReallyTriviallyReMaterializable(const MachineInstr &MI,
+                                                     AliasAnalysis *AA) const {
+  switch (MI.getOpcode()) {
+  default: 
+    // This function should only be called for opcodes with the ReMaterializable
+    // flag set.
+    llvm_unreachable("Unknown rematerializable operation!");
+    break;
+  case PPC::LI:
+  case PPC::LI8:
+  case PPC::LIS:
+  case PPC::LIS8:
+  case PPC::QVGPCI:
+  case PPC::ADDIStocHA:
+  case PPC::ADDItocL:
+  case PPC::LOAD_STACK_GUARD:
+    return true;
+  }
+  return false;
+}
+
 unsigned PPCInstrInfo::isStoreToStackSlot(const MachineInstr &MI,
                                           int &FrameIndex) const {
   // Note: This list must be kept consistent with StoreRegToStackSlot.