Replace r169459 with something safer. Rather than having computeMaskedBits to

understand target implementation of any_extend / extload, just generate
zero_extend in place of any_extend for liveouts when the target knows the
zero_extend will be implicit (e.g. ARM ldrb / ldrh) or folded (e.g. x86 movz).

rdar://12771555


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169536 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 5 deletions

diff --git a/lib/Target/ARM/ARMISelLowering.h b/lib/Target/ARM/ARMISelLowering.h
index bde2ad4924..8f7b593cbf 100644
--- a/lib/Target/ARM/ARMISelLowering.h
+++ b/lib/Target/ARM/ARMISelLowering.h
@@ -294,6 +294,8 @@ namespace llvm {
                                     bool MemcpyStrSrc,
                                     MachineFunction &MF) const;
 
+    virtual bool isZExtFree(SDValue Val, EVT VT2) const;
+
     /// isLegalAddressingMode - Return true if the addressing mode represented
     /// by AM is legal for this target, for a load/store of the specified type.
     virtual bool isLegalAddressingMode(const AddrMode &AM, Type *Ty)const;
@@ -333,11 +335,6 @@ namespace llvm {
                                                 const SelectionDAG &DAG,
                                                 unsigned Depth) const;
 
-    virtual void computeMaskedBitsForAnyExtend(const SDValue Op,
-                                               APInt &KnownZero,
-                                               APInt &KnownOne,
-                                               const SelectionDAG &DAG,
-                                               unsigned Depth) const;
 
     virtual bool ExpandInlineAsm(CallInst *CI) const;