diff --git a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
--- a/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
@@ -344,6 +344,18 @@
       setCondCodeAction(ISD::SETUGT, VT, Expand);
       setCondCodeAction(ISD::SETUEQ, VT, Expand);
       setCondCodeAction(ISD::SETUNE, VT, Expand);
+
+      setOperationAction(ISD::FREM, VT, Expand);
+      setOperationAction(ISD::FPOW, VT, Expand);
+      setOperationAction(ISD::FPOWI, VT, Expand);
+      setOperationAction(ISD::FCOS, VT, Expand);
+      setOperationAction(ISD::FSIN, VT, Expand);
+      setOperationAction(ISD::FSINCOS, VT, Expand);
+      setOperationAction(ISD::FEXP, VT, Expand);
+      setOperationAction(ISD::FEXP2, VT, Expand);
+      setOperationAction(ISD::FLOG, VT, Expand);
+      setOperationAction(ISD::FLOG2, VT, Expand);
+      setOperationAction(ISD::FLOG10, VT, Expand);
     }
   }
 
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
--- a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4973,8 +4973,8 @@
   bool UseVectorIntrinsic = ID && IntrinsicCost <= CallCost;
   assert((UseVectorIntrinsic || !NeedToScalarize) &&
          "Instruction should be scalarized elsewhere.");
-  assert(IntrinsicCost.isValid() && CallCost.isValid() &&
-         "Cannot have invalid costs while widening");
+  assert((IntrinsicCost.isValid() || CallCost.isValid()) &&
+         "Either the intrinsic cost or vector call cost must be valid");
 
   for (unsigned Part = 0; Part < UF; ++Part) {
     SmallVector<Value *, 4> Args;
@@ -8538,8 +8538,8 @@
     InstructionCost CallCost = CM.getVectorCallCost(CI, VF, NeedToScalarize);
     InstructionCost IntrinsicCost = ID ? CM.getVectorIntrinsicCost(CI, VF) : 0;
     bool UseVectorIntrinsic = ID && IntrinsicCost <= CallCost;
-    assert(IntrinsicCost.isValid() && CallCost.isValid() &&
-           "Cannot have invalid costs while widening");
+    assert((IntrinsicCost.isValid() || CallCost.isValid()) &&
+           "Either the intrinsic cost or vector call cost must be valid");
     return UseVectorIntrinsic || !NeedToScalarize;
   };
 
diff --git a/llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll b/llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll
--- a/llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll
+++ b/llvm/test/Analysis/CostModel/AArch64/sve-intrinsics.ll
@@ -181,4 +181,38 @@
 declare <vscale x 4 x i1> @llvm.experimental.vector.reverse.nxv4i1(<vscale x 4 x i1>)
 declare <vscale x 2 x i1> @llvm.experimental.vector.reverse.nxv2i1(<vscale x 2 x i1>)
 
+define void @unsupported_fp_ops(<vscale x 4 x float> %vec) {
+; CHECK-LABEL: 'unsupported_fp_ops'
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %sin = call <vscale x 4 x float> @llvm.sin.nxv4f32(<vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %cos = call <vscale x 4 x float> @llvm.cos.nxv4f32(<vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %pow = call <vscale x 4 x float> @llvm.pow.nxv4f32(<vscale x 4 x float> %vec, <vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %powi = call <vscale x 4 x float> @llvm.powi.nxv4f32(<vscale x 4 x float> %vec, i32 42)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %exp = call <vscale x 4 x float> @llvm.exp.nxv4f32(<vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %exp2 = call <vscale x 4 x float> @llvm.exp2.nxv4f32(<vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %log = call <vscale x 4 x float> @llvm.log.nxv4f32(<vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %log2 = call <vscale x 4 x float> @llvm.log2.nxv4f32(<vscale x 4 x float> %vec)
+; CHECK-NEXT: Cost Model: Invalid cost for instruction: %log10 = call <vscale x 4 x float> @llvm.log10.nxv4f32(<vscale x 4 x float> %vec)
+
+  %sin = call <vscale x 4 x float> @llvm.sin.nxv4f32(<vscale x 4 x float> %vec)
+  %cos = call <vscale x 4 x float> @llvm.cos.nxv4f32(<vscale x 4 x float> %vec)
+  %pow = call <vscale x 4 x float> @llvm.pow.nxv4f32(<vscale x 4 x float> %vec, <vscale x 4 x float> %vec)
+  %powi = call <vscale x 4 x float> @llvm.powi.nxv4f32(<vscale x 4 x float> %vec, i32 42)
+  %exp = call <vscale x 4 x float> @llvm.exp.nxv4f32(<vscale x 4 x float> %vec)
+  %exp2 = call <vscale x 4 x float> @llvm.exp2.nxv4f32(<vscale x 4 x float> %vec)
+  %log = call <vscale x 4 x float> @llvm.log.nxv4f32(<vscale x 4 x float> %vec)
+  %log2 = call <vscale x 4 x float> @llvm.log2.nxv4f32(<vscale x 4 x float> %vec)
+  %log10 = call <vscale x 4 x float> @llvm.log10.nxv4f32(<vscale x 4 x float> %vec)
+  ret void
+}
+
+declare <vscale x 4 x float> @llvm.sin.nxv4f32(<vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.cos.nxv4f32(<vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.pow.nxv4f32(<vscale x 4 x float>, <vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.powi.nxv4f32(<vscale x 4 x float>, i32)
+declare <vscale x 4 x float> @llvm.exp.nxv4f32(<vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.exp2.nxv4f32(<vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.log.nxv4f32(<vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.log2.nxv4f32(<vscale x 4 x float>)
+declare <vscale x 4 x float> @llvm.log10.nxv4f32(<vscale x 4 x float>)
+
 attributes #0 = { "target-features"="+sve,+bf16" }
diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll b/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
--- a/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/scalable-call.ll
@@ -72,11 +72,10 @@
 }
 
 define void @vec_intrinsic(i64 %N, double* nocapture readonly %a) {
-;; FIXME: Should be calling sin_vec, once the cost of scalarizing is handled.
 ; CHECK-LABEL: @vec_intrinsic
 ; CHECK: vector.body:
 ; CHECK: %[[LOAD:.*]] = load <vscale x 2 x double>, <vscale x 2 x double>*
-; CHECK: call fast <vscale x 2 x double> @llvm.sin.nxv2f64(<vscale x 2 x double> %[[LOAD]])
+; CHECK: call fast <vscale x 2 x double> @sin_vec(<vscale x 2 x double> %[[LOAD]])
 entry:
   %cmp7 = icmp sgt i64 %N, 0
   br i1 %cmp7, label %for.body, label %for.end