commit 4b76ffc1ffca2ed016467e916d5223515b485592
author Jakob Stoklund Olesen <stoklund@2pi.dk> Wed Jul 07 00:32:25 2010 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Wed Jul 07 00:32:25 2010 +0000
tree 79ffbfbecf7d39d3b8789af4953e194fe1c7963d
parent 78dfbc380d685c59b9321e43c10677a179850e29

Revert "Remove references to INSERT_SUBREG after de-SSA" r107725.

Buildbot breakage.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107744 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/LiveIntervalAnalysis.cpp

diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 7c07c04..a626fc0 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -324,6 +324,12 @@
     if (mi->isCopyLike() ||
         tii_->isMoveInstr(*mi, SrcReg, DstReg, SrcSubReg, DstSubReg)) {
       CopyMI = mi;
+
+      // Some of the REG_SEQUENCE lowering in TwoAddressInstrPass creates
+      // implicit defs without really knowing. It shows up as INSERT_SUBREG
+      // using an undefined register.
+      if (mi->isInsertSubreg())
+        mi->getOperand(1).setIsUndef();
     }
 
     VNInfo *ValNo = interval.getNextValue(defIndex, CopyMI, true,