Index: lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
===================================================================
--- lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
+++ lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
@@ -1184,6 +1184,18 @@
     Inst = TmpInst;
     break;
   }
+  case PPC::MFTB: {
+    if (STI.getFeatureBits()[PPC::DeprecatedMFTB]) {
+      assert(Inst.getNumOperands() == 2 && "Expecting two operands");
+      
+      MCInst TmpInst;
+      TmpInst.setOpcode(PPC::MFSPR);
+      TmpInst.addOperand(Inst.getOperand(0));
+      TmpInst.addOperand(Inst.getOperand(1));
+      Inst = TmpInst;
+    }
+    break;
+  }
   }
 }
 
Index: lib/Target/PowerPC/PPC.td
===================================================================
--- lib/Target/PowerPC/PPC.td
+++ lib/Target/PowerPC/PPC.td
@@ -247,7 +247,7 @@
 // PowerPC processors supported.
 //
 
-def : Processor<"generic", G3Itineraries, [Directive32]>;
+def : Processor<"generic", G3Itineraries, [Directive32, DeprecatedMFTB]>;
 def : ProcessorModel<"440", PPC440Model, [Directive440, FeatureISEL,
                                           FeatureFRES, FeatureFRSQRTE,
                                           FeatureICBT, FeatureBookE, 
@@ -257,37 +257,51 @@
                                           FeatureICBT, FeatureBookE, 
                                           FeatureMSYNC, DeprecatedMFTB]>;
 def : Processor<"601", G3Itineraries, [Directive601]>;
-def : Processor<"602", G3Itineraries, [Directive602]>;
+def : Processor<"602", G3Itineraries, [Directive602,
+                                       DeprecatedMFTB]>;
 def : Processor<"603", G3Itineraries, [Directive603,
-                                       FeatureFRES, FeatureFRSQRTE]>;
+                                       FeatureFRES, FeatureFRSQRTE,
+                                       DeprecatedMFTB]>;
 def : Processor<"603e", G3Itineraries, [Directive603,
-                                        FeatureFRES, FeatureFRSQRTE]>;
+                                        FeatureFRES, FeatureFRSQRTE,
+                                        DeprecatedMFTB]>;
 def : Processor<"603ev", G3Itineraries, [Directive603,
-                                         FeatureFRES, FeatureFRSQRTE]>;
+                                         FeatureFRES, FeatureFRSQRTE,
+                                         DeprecatedMFTB]>;
 def : Processor<"604", G3Itineraries, [Directive604,
-                                       FeatureFRES, FeatureFRSQRTE]>;
+                                       FeatureFRES, FeatureFRSQRTE,
+                                       DeprecatedMFTB]>;
 def : Processor<"604e", G3Itineraries, [Directive604,
-                                        FeatureFRES, FeatureFRSQRTE]>;
+                                        FeatureFRES, FeatureFRSQRTE,
+                                        DeprecatedMFTB]>;
 def : Processor<"620", G3Itineraries, [Directive620,
-                                       FeatureFRES, FeatureFRSQRTE]>;
+                                       FeatureFRES, FeatureFRSQRTE,
+                                       DeprecatedMFTB]>;
 def : Processor<"750", G4Itineraries, [Directive750,
-                                       FeatureFRES, FeatureFRSQRTE]>;
+                                       FeatureFRES, FeatureFRSQRTE,
+                                       DeprecatedMFTB]>;
 def : Processor<"g3", G3Itineraries, [Directive750,
-                                      FeatureFRES, FeatureFRSQRTE]>;
+                                      FeatureFRES, FeatureFRSQRTE,
+                                      DeprecatedMFTB]>;
 def : Processor<"7400", G4Itineraries, [Directive7400, FeatureAltivec,
-                                        FeatureFRES, FeatureFRSQRTE]>;
+                                        FeatureFRES, FeatureFRSQRTE,
+                                        DeprecatedMFTB]>;
 def : Processor<"g4", G4Itineraries, [Directive7400, FeatureAltivec,
-                                      FeatureFRES, FeatureFRSQRTE]>;
+                                      FeatureFRES, FeatureFRSQRTE,
+                                      DeprecatedMFTB]>;
 def : Processor<"7450", G4PlusItineraries, [Directive7400, FeatureAltivec,
-                                            FeatureFRES, FeatureFRSQRTE]>;
+                                            FeatureFRES, FeatureFRSQRTE,
+                                            DeprecatedMFTB]>;
 def : Processor<"g4+", G4PlusItineraries, [Directive7400, FeatureAltivec,
-                                           FeatureFRES, FeatureFRSQRTE]>;
+                                           FeatureFRES, FeatureFRSQRTE, 
+                                           DeprecatedMFTB]>;
 
 def : ProcessorModel<"970", G5Model,
                   [Directive970, FeatureAltivec,
                    FeatureMFOCRF, FeatureFSqrt,
                    FeatureFRES, FeatureFRSQRTE, FeatureSTFIWX,
-                   Feature64Bit /*, Feature64BitRegs */]>;
+                   Feature64Bit /*, Feature64BitRegs */,
+                   DeprecatedMFTB]>;
 def : ProcessorModel<"g5", G5Model,
                   [Directive970, FeatureAltivec,
                    FeatureMFOCRF, FeatureFSqrt, FeatureSTFIWX,
@@ -325,7 +339,7 @@
 def : ProcessorModel<"pwr4", G5Model,
                   [DirectivePwr4, FeatureAltivec, FeatureMFOCRF,
                    FeatureFSqrt, FeatureFRES, FeatureFRSQRTE,
-                   FeatureSTFIWX, Feature64Bit]>;
+                   FeatureSTFIWX, Feature64Bit, DeprecatedMFTB]>;
 def : ProcessorModel<"pwr5", G5Model,
                   [DirectivePwr5, FeatureAltivec, FeatureMFOCRF,
                    FeatureFSqrt, FeatureFRE, FeatureFRES,
@@ -354,12 +368,13 @@
                    DeprecatedMFTB, DeprecatedDST]>;
 def : ProcessorModel<"pwr7", P7Model, ProcessorFeatures.Power7FeatureList>;
 def : ProcessorModel<"pwr8", P8Model, ProcessorFeatures.Power8FeatureList>;
-def : Processor<"ppc", G3Itineraries, [Directive32]>;
+def : Processor<"ppc", G3Itineraries, [Directive32, DeprecatedMFTB]>;
 def : ProcessorModel<"ppc64", G5Model,
                   [Directive64, FeatureAltivec,
                    FeatureMFOCRF, FeatureFSqrt, FeatureFRES,
                    FeatureFRSQRTE, FeatureSTFIWX,
-                   Feature64Bit /*, Feature64BitRegs */]>;
+                   Feature64Bit /*, Feature64BitRegs */,
+                   DeprecatedMFTB]>;
 def : ProcessorModel<"ppc64le", P8Model, ProcessorFeatures.Power8FeatureList>;
 
 //===----------------------------------------------------------------------===//
Index: lib/Target/PowerPC/PPCInstrInfo.td
===================================================================
--- lib/Target/PowerPC/PPCInstrInfo.td
+++ lib/Target/PowerPC/PPCInstrInfo.td
@@ -2225,7 +2225,7 @@
                       "mtspr $SPR, $RT", IIC_SprMTSPR>;
 
 def MFTB : XFXForm_1<31, 371, (outs gprc:$RT), (ins i32imm:$SPR),
-                     "mftb $RT, $SPR", IIC_SprMFTB>, Deprecated<DeprecatedMFTB>;
+                     "mftb $RT, $SPR", IIC_SprMFTB>;
 
 // A pseudo-instruction used to implement the read of the 64-bit cycle counter
 // on a 32-bit target.
Index: test/CodeGen/PowerPC/mftb.ll
===================================================================
--- test/CodeGen/PowerPC/mftb.ll
+++ test/CodeGen/PowerPC/mftb.ll
@@ -0,0 +1,72 @@
+; Check handling of the mftb instruction.
+; For CPUs 601 and pwr3, the mftb instruction should be emitted.
+; On all other CPUs (including generic, ppc, ppc64), the mfspr instruction 
+; should be used instead. There should no longer be a deprecated warning 
+; message emittedfor this instruction for any CPU.
+
+; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFSPR
+; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr8 < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFSPR
+; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFSPR
+; RUN: llc -mtriple=powerpc-unknown-linux-gnu  < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFSPR
+; RUN: llc -mtriple=powerpc-unknown-linux-gnu -mcpu=ppc < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFSPR
+; RUN: llc -mtriple=powerpc-unknown-linux-gnu -mcpu=601 < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFTB
+; RUN: llc -mtriple=powerpc-unknown-linux-gnu -mcpu=pwr3 < %s 2>&1 \
+; RUN:    | FileCheck %s --check-prefix=CHECK-MFTB
+
+; CHECK-MFSPR-NOT: warning: deprecated
+; CHECK-MFTB-NOT: warning: deprecated
+
+define i32 @get_time() {
+       %time = call i32 asm "mftb $0, 268", "=r"()
+       ret i32 %time
+; CHECK-MFSPR-LABEL: @get_time
+; CHECK-MFSPR: mfspr 3, 268
+; CHECK-MFSPR: blr
+
+; CHECK-MFTB-LABEL: @get_time
+; CHECK-MFTB: mftb 3, 268
+; CHECK-MFTB: blr
+}
+
+define i32 @get_timeu() {
+       %time = call i32 asm "mftb $0, 269", "=r"()
+       ret i32 %time
+; CHECK-MFSPR-LABEL: @get_timeu
+; CHECK-MFSPR: mfspr 3, 269
+; CHECK-MFSPR: blr
+
+; CHECK-MFTB-LABEL: @get_timeu
+; CHECK-MFTB: mftbu 3
+; CHECK-MFTB: blr
+}
+
+define i32 @get_time_e() {
+       %time = call i32 asm "mftb $0", "=r"()
+       ret i32 %time
+; CHECK-MFSPR-LABEL: @get_time_e
+; CHECK-MFSPR: mfspr 3, 268
+; CHECK-MFSPR: blr
+
+; CHECK-MFTB-LABEL: @get_time_e
+; CHECK-MFTB: mftb 3, 268
+; CHECK-MFTB: blr
+}
+
+define i32 @get_timeu_e() {
+       %time = call i32 asm "mftbu $0", "=r"()
+       ret i32 %time
+; CHECK-MFSPR-LABEL: @get_timeu_e
+; CHECK-MFSPR: mfspr 3, 269
+; CHECK-MFSPR: blr
+
+; CHECK-MFTB-LABEL: @get_timeu_e
+; CHECK-MFTB: mftbu 3
+; CHECK-MFTB: blr
+}
+
Index: test/MC/PowerPC/deprecated-p7.s
===================================================================
--- test/MC/PowerPC/deprecated-p7.s
+++ test/MC/PowerPC/deprecated-p7.s
@@ -3,8 +3,8 @@
 # RUN: llvm-mc -triple powerpc-unknown-linux-gnu -mcpu=601 -show-encoding < %s 2>&1 | FileCheck -check-prefix=CHECK-OLD %s
 
          mftb 3
-# CHECK: warning: deprecated
-# CHECK: mftb 3
+# CHECK-NOT: warning: deprecated
+# CHECK: mfspr 3, 268
 
 # CHECK-OLD-NOT: warning: deprecated
 # CHECK-OLD: mftb 3