Detect and handle COPY in many places.
This code is transitional, it will soon be possible to eliminate
isExtractSubreg, isInsertSubreg, and isMoveInstr in most places.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107547 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/PreAllocSplitting.cpp b/lib/CodeGen/PreAllocSplitting.cpp
index 8784dc9..fbe9918 100644
--- a/lib/CodeGen/PreAllocSplitting.cpp
+++ b/lib/CodeGen/PreAllocSplitting.cpp
@@ -677,10 +677,12 @@
// If the def is a move, set the copy field.
unsigned SrcReg, DstReg, SrcSubIdx, DstSubIdx;
- if (TII->isMoveInstr(*DI, SrcReg, DstReg, SrcSubIdx, DstSubIdx))
+ if (TII->isMoveInstr(*DI, SrcReg, DstReg, SrcSubIdx, DstSubIdx)) {
if (DstReg == LI->reg)
NewVN->setCopy(&*DI);
-
+ } else if (DI->isCopyLike() && DI->getOperand(0).getReg() == LI->reg)
+ NewVN->setCopy(&*DI);
+
NewVNs[&*DI] = NewVN;
}