When an instruction like: A += B had both A and B virtual registers
spilled, A was loaded from its stack location twice. This fixes the bug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11093 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 9d7b1b2..869d963 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -27,6 +27,24 @@
//
extern const TargetInstrDescriptor *TargetInstrDescriptors;
+bool MachineOperand::isEverUsed(const MachineInstr& mi) const
+{
+ for (int i = 0, e = mi.getNumOperands(); i != e; ++i) {
+ if (*this == mi.getOperand(i) && mi.getOperand(i).isUse())
+ return true;
+ }
+ return false;
+}
+
+bool MachineOperand::isEverDefined(const MachineInstr& mi) const
+{
+ for (int i = 0, e = mi.getNumOperands(); i != e; ++i) {
+ if (*this == mi.getOperand(i) && mi.getOperand(i).isDef())
+ return true;
+ }
+ return false;
+}
+
// Constructor for instructions with variable #operands
MachineInstr::MachineInstr(MachineOpCode OpCode, unsigned numOperands)
: opCode(OpCode),