PPC/s390: fix linker error

R=joransiu@ca.ibm.com

Bug: 
Change-Id: I7d65f467ece4b93c268d481318f3d0e6f0485069
Reviewed-on: https://chromium-review.googlesource.com/860763Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#50519}

src/compiler/ppc/instruction-selector-ppc.cc

@@ -2245,6 +2245,16 @@ void InstructionSelector::EmitPrepareResults(ZoneVector<PushParameter>* results,
   // TODO(John): Port.
 }
 
+void InstructionSelector::VisitF32x4Add(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Sub(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Mul(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Min(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Max(Node* node) { UNIMPLEMENTED(); }
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {

src/compiler/s390/instruction-selector-s390.cc

@@ -2576,6 +2576,16 @@ void InstructionSelector::EmitPrepareResults(ZoneVector<PushParameter>* results,
   // TODO(John): Port.
 }
 
+void InstructionSelector::VisitF32x4Add(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Sub(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Mul(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Min(Node* node) { UNIMPLEMENTED(); }
+
+void InstructionSelector::VisitF32x4Max(Node* node) { UNIMPLEMENTED(); }
+
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {