One more extract_subreg coalescing bug fix.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43065 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp
index 1d274b3ef18455477efd2aebe464653ff7ccb23a..ee2cbbb8ea5b5f07fca915ca48c109274fcf1113 100644 (file)
--- a/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp
@@ -236,7 +236,7 @@ bool SimpleRegisterCoalescing::JoinCopy(MachineInstr *CopyMI,
       // If this is a extract_subreg where dst is a physical register, e.g.
       // cl = EXTRACT_SUBREG reg1024, 1
       // then create and update the actual physical register allocated to RHS.
-      const TargetRegisterClass *RC = mf_->getSSARegMap()->getRegClass(SrcReg);
+      const TargetRegisterClass *RC=mf_->getSSARegMap()->getRegClass(repSrcReg);
       for (const unsigned *SRs = mri_->getSuperRegisters(repDstReg);
            unsigned SR = *SRs; ++SRs) {
         if (repDstReg == mri_->getSubReg(SR, SubIdx) &&