ARM: Fast-isel register class constrain for extends.

[oota-llvm.git] / lib / Target / ARM / ARMFastISel.cpp

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 2845db336f6271465bb46e03b99f354265c007d8..fb8153dada931b906e5de452f47d228744dd9421 100644 (file)
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -2774,6 +2774,7 @@ unsigned ARMFastISel::ARMEmitIntExt(MVT SrcVT, unsigned SrcReg, MVT DestVT,
         *FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(Opcode), ResultReg);
     if (setsCPSR)
       MIB.addReg(ARM::CPSR, RegState::Define);
+    SrcReg = constrainOperandRegClass(TII.get(Opcode), SrcReg, 1 + setsCPSR);
     AddDefaultPred(MIB.addReg(SrcReg, isKill * RegState::Kill).addImm(ImmEnc));
     if (hasS)
       AddDefaultCC(MIB);