diff --git a/llvm/include/llvm/CodeGen/BasicTTIImpl.h b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
--- a/llvm/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/llvm/include/llvm/CodeGen/BasicTTIImpl.h
@@ -1150,21 +1150,15 @@
       break;
 
     case Intrinsic::cttz:
-      // FIXME: all cost kinds should default to the same thing?
-      if (CostKind != TTI::TCK_RecipThroughput) {
-        if (getTLI()->isCheapToSpeculateCttz())
-          return TargetTransformInfo::TCC_Basic;
-        return BaseT::getIntrinsicInstrCost(ICA, CostKind);
-      }
+      // FIXME: If necessary, this should go in target-specific overrides.
+      if (VF == 1 && RetVF == 1 && getTLI()->isCheapToSpeculateCttz())
+        return TargetTransformInfo::TCC_Basic;
       break;
 
     case Intrinsic::ctlz:
-      // FIXME: all cost kinds should default to the same thing?
-      if (CostKind != TTI::TCK_RecipThroughput) {
-        if (getTLI()->isCheapToSpeculateCtlz())
-          return TargetTransformInfo::TCC_Basic;
-        return BaseT::getIntrinsicInstrCost(ICA, CostKind);
-      }
+      // FIXME: If necessary, this should go in target-specific overrides.
+      if (VF == 1 && RetVF == 1 && getTLI()->isCheapToSpeculateCtlz())
+        return TargetTransformInfo::TCC_Basic;
       break;
 
     case Intrinsic::memcpy:
diff --git a/llvm/test/Analysis/CostModel/X86/intrinsic-cost-kinds.ll b/llvm/test/Analysis/CostModel/X86/intrinsic-cost-kinds.ll
--- a/llvm/test/Analysis/CostModel/X86/intrinsic-cost-kinds.ll
+++ b/llvm/test/Analysis/CostModel/X86/intrinsic-cost-kinds.ll
@@ -95,13 +95,13 @@
 ; LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
 ; SIZE-LABEL: 'cttz'
-; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %s = call i32 @llvm.cttz.i32(i32 %a, i1 false)
-; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %v = call <16 x i32> @llvm.cttz.v16i32(<16 x i32> %va, i1 false)
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %s = call i32 @llvm.cttz.i32(i32 %a, i1 false)
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 72 for instruction: %v = call <16 x i32> @llvm.cttz.v16i32(<16 x i32> %va, i1 false)
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
 ; SIZE_LATE-LABEL: 'cttz'
-; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %s = call i32 @llvm.cttz.i32(i32 %a, i1 false)
-; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %v = call <16 x i32> @llvm.cttz.v16i32(<16 x i32> %va, i1 false)
+; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %s = call i32 @llvm.cttz.i32(i32 %a, i1 false)
+; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 72 for instruction: %v = call <16 x i32> @llvm.cttz.v16i32(<16 x i32> %va, i1 false)
 ; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
   %s = call i32 @llvm.cttz.i32(i32 %a, i1 false)
@@ -121,13 +121,13 @@
 ; LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
 ; SIZE-LABEL: 'ctlz'
-; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %s = call i32 @llvm.ctlz.i32(i32 %a, i1 true)
-; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %v = call <16 x i32> @llvm.ctlz.v16i32(<16 x i32> %va, i1 true)
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %s = call i32 @llvm.ctlz.i32(i32 %a, i1 true)
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 104 for instruction: %v = call <16 x i32> @llvm.ctlz.v16i32(<16 x i32> %va, i1 true)
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
 ; SIZE_LATE-LABEL: 'ctlz'
-; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %s = call i32 @llvm.ctlz.i32(i32 %a, i1 true)
-; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %v = call <16 x i32> @llvm.ctlz.v16i32(<16 x i32> %va, i1 true)
+; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %s = call i32 @llvm.ctlz.i32(i32 %a, i1 true)
+; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 104 for instruction: %v = call <16 x i32> @llvm.ctlz.v16i32(<16 x i32> %va, i1 true)
 ; SIZE_LATE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
   %s = call i32 @llvm.ctlz.i32(i32 %a, i1 true)