Convert EXTRACT_SUBREG to COPY when emitting machine instrs.
EXTRACT_SUBREG no longer appears as a machine instruction. Use COPY instead.
Add isCopy() checks in many places using isMoveInstr() and isExtractSubreg().
The isMoveInstr hook will be removed later.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107879 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 7c07c04..74ca497 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -192,6 +192,9 @@
if (tii_->isMoveInstr(MI, SrcReg, DstReg, SrcSubReg, DstSubReg))
if (SrcReg == li.reg || DstReg == li.reg)
continue;
+ if (MI.isCopy() && MI.getOperand(0).getReg() == li.reg &&
+ MI.getOperand(1).getReg() == li.reg)
+ continue;
// Check for operands using reg
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {