[llvm-commits] [llvm] r75955 - /llvm/trunk/lib/CodeGen/LowerSubregs.cpp

[Anton Korobeynikov]

Author: asl
Date: Thu Jul 16 08:55:26 2009
New Revision: 75955

URL: http://llvm.org/viewvc/llvm-project?rev=75955&view=rev
Log:
Let RegisterInfo decide whether it can emit cross-class copy or not

Modified:
    llvm/trunk/lib/CodeGen/LowerSubregs.cpp

Modified: llvm/trunk/lib/CodeGen/LowerSubregs.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LowerSubregs.cpp?rev=75955&r1=75954&r2=75955&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/LowerSubregs.cpp (original)
+++ llvm/trunk/lib/CodeGen/LowerSubregs.cpp Thu Jul 16 08:55:26 2009
@@ -132,10 +132,11 @@
         }
   } else {
     // Insert copy
-    const TargetRegisterClass *TRC = TRI.getPhysicalRegisterRegClass(DstReg);
-    assert(TRC == TRI.getPhysicalRegisterRegClass(SrcReg) &&
-            "Extract subreg and Dst must be of same register class");
-    TII.copyRegToReg(*MBB, MI, DstReg, SrcReg, TRC, TRC);
+    const TargetRegisterClass *TRCS = TRI.getPhysicalRegisterRegClass(DstReg);
+    const TargetRegisterClass *TRCD = TRI.getPhysicalRegisterRegClass(SrcReg);
+    bool Emitted = TII.copyRegToReg(*MBB, MI, DstReg, SrcReg, TRCD, TRCS);
+    (void)Emitted;
+    assert(Emitted && "Subreg and Dst must be of compatible register class");
     // Transfer the kill/dead flags, if needed.
     if (MI->getOperand(0).isDead())
       TransferDeadFlag(MI, DstReg, TRI);