Add an assertion to verify that a copy was actually emitted.

llvm-svn: 68953

1 files changed, 2 insertions, 1 deletions

diff --git a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
index 8aa866ea29b..20770a17ef2 100644
--- a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -857,7 +857,8 @@ bool TwoAddressInstructionPass::runOnMachineFunction(MachineFunction &MF) {
             ReMatRegs.set(regB);
             ++NumReMats;
           } else {
-            TII->copyRegToReg(*mbbi, mi, regA, regB, rc, rc);
+            bool Emitted = TII->copyRegToReg(*mbbi, mi, regA, regB, rc, rc);
+            assert(Emitted && "Unable to issue a copy instruction!\n");
           }
 
           MachineBasicBlock::iterator prevMI = prior(mi);