[GlobalISel][CallLowering] Rename isArgumentHandler() -> isIncomingArgumentHandler()

Previous name and comment incorrectly implied it was just for formal arg handlers,
which is not true.

llvm-svn: 367945
diff --git a/llvm/lib/Target/AArch64/AArch64CallLowering.cpp b/llvm/lib/Target/AArch64/AArch64CallLowering.cpp
index c7434e5..31b5e8a 100644
--- a/llvm/lib/Target/AArch64/AArch64CallLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64CallLowering.cpp
@@ -99,7 +99,7 @@
   /// (it's an implicit-def of the BL).
   virtual void markPhysRegUsed(unsigned PhysReg) = 0;
 
-  bool isArgumentHandler() const override { return true; }
+  bool isIncomingArgumentHandler() const override { return true; }
 
   uint64_t StackUsed;
 };
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
index 905443f..6b194b1 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
@@ -128,7 +128,7 @@
   virtual void markPhysRegUsed(unsigned PhysReg) = 0;
 
   // FIXME: What is the point of this being a callback?
-  bool isArgumentHandler() const override { return true; }
+  bool isIncomingArgumentHandler() const override { return true; }
 };
 
 struct FormalArgHandler : public IncomingArgHandler {
diff --git a/llvm/lib/Target/ARM/ARMCallLowering.cpp b/llvm/lib/Target/ARM/ARMCallLowering.cpp
index 00f21a9..a507756 100644
--- a/llvm/lib/Target/ARM/ARMCallLowering.cpp
+++ b/llvm/lib/Target/ARM/ARMCallLowering.cpp
@@ -286,7 +286,7 @@
                        CCAssignFn AssignFn)
       : ValueHandler(MIRBuilder, MRI, AssignFn) {}
 
-  bool isArgumentHandler() const override { return true; }
+  bool isIncomingArgumentHandler() const override { return true; }
 
   Register getStackAddress(uint64_t Size, int64_t Offset,
                            MachinePointerInfo &MPO) override {
diff --git a/llvm/lib/Target/X86/X86CallLowering.cpp b/llvm/lib/Target/X86/X86CallLowering.cpp
index e4079d6..89b3603 100644
--- a/llvm/lib/Target/X86/X86CallLowering.cpp
+++ b/llvm/lib/Target/X86/X86CallLowering.cpp
@@ -229,7 +229,7 @@
       : ValueHandler(MIRBuilder, MRI, AssignFn),
         DL(MIRBuilder.getMF().getDataLayout()) {}
 
-  bool isArgumentHandler() const override { return true; }
+  bool isIncomingArgumentHandler() const override { return true; }
 
   Register getStackAddress(uint64_t Size, int64_t Offset,
                            MachinePointerInfo &MPO) override {