Subzero. ARM32. No more SP frobbing.

src/IceTargetLoweringX86Base.h

Index: src/IceTargetLoweringX86Base.h
diff --git a/src/IceTargetLoweringX86Base.h b/src/IceTargetLoweringX86Base.h
index 3127151c3aa2651a9695f531b53dfb82ef207f49..36d3f9b1d8816c6aa618bc73b3fa55d2c66e073c 100644
--- a/src/IceTargetLoweringX86Base.h
+++ b/src/IceTargetLoweringX86Base.h
@@ -182,6 +182,10 @@ protected:
   void lowerOther(const Inst *Instr) override;
   void lowerRMW(const typename Traits::Insts::FakeRMW *RMW);
   void prelowerPhis() override;
+  uint32_t getCallStackArgumentsSizeBytes(const InstCall *Instr) override {
+    (void)Instr;
+    return 0;
+  }
   void genTargetHelperCallFor(Inst *Instr) override { (void)Instr; }
   void doAddressOptLoad() override;
   void doAddressOptStore() override;