[llvm] [AMDGPU][NFC] Remove an unneeded return value. (PR #126739)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Ivan Kosarev (kosarev)

<details>
<summary>Changes</summary>

And rename the function to disassociate it from the one where generating loading of the input value may actually fail.

---
Full diff: https://github.com/llvm/llvm-project/pull/126739.diff


3 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp (+10-9) 
- (modified) llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp (+7-7) 
- (modified) llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h (+3-3) 


``````````diff
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
index bb00442342d843..478a4c161fce70 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUCallLowering.cpp
@@ -816,7 +816,7 @@ bool AMDGPUCallLowering::passSpecialInputs(MachineIRBuilder &MIRBuilder,
     Register InputReg = MRI.createGenericVirtualRegister(ArgTy);
 
     if (IncomingArg) {
-      LI->loadInputValue(InputReg, MIRBuilder, IncomingArg, ArgRC, ArgTy);
+      LI->buildLoadInputValue(InputReg, MIRBuilder, IncomingArg, ArgRC, ArgTy);
     } else if (InputID == AMDGPUFunctionArgInfo::IMPLICIT_ARG_PTR) {
       LI->getImplicitArgPtr(InputReg, MRI, MIRBuilder);
     } else if (InputID == AMDGPUFunctionArgInfo::LDS_KERNEL_ID) {
@@ -883,8 +883,9 @@ bool AMDGPUCallLowering::passSpecialInputs(MachineIRBuilder &MIRBuilder,
       NeedWorkItemIDX) {
     if (ST.getMaxWorkitemID(MF.getFunction(), 0) != 0) {
       InputReg = MRI.createGenericVirtualRegister(S32);
-      LI->loadInputValue(InputReg, MIRBuilder, IncomingArgX,
-                         std::get<1>(WorkitemIDX), std::get<2>(WorkitemIDX));
+      LI->buildLoadInputValue(InputReg, MIRBuilder, IncomingArgX,
+                              std::get<1>(WorkitemIDX),
+                              std::get<2>(WorkitemIDX));
     } else {
       InputReg = MIRBuilder.buildConstant(S32, 0).getReg(0);
     }
@@ -893,8 +894,8 @@ bool AMDGPUCallLowering::passSpecialInputs(MachineIRBuilder &MIRBuilder,
   if (IncomingArgY && !IncomingArgY->isMasked() && CalleeArgInfo->WorkItemIDY &&
       NeedWorkItemIDY && ST.getMaxWorkitemID(MF.getFunction(), 1) != 0) {
     Register Y = MRI.createGenericVirtualRegister(S32);
-    LI->loadInputValue(Y, MIRBuilder, IncomingArgY, std::get<1>(WorkitemIDY),
-                       std::get<2>(WorkitemIDY));
+    LI->buildLoadInputValue(Y, MIRBuilder, IncomingArgY,
+                            std::get<1>(WorkitemIDY), std::get<2>(WorkitemIDY));
 
     Y = MIRBuilder.buildShl(S32, Y, MIRBuilder.buildConstant(S32, 10)).getReg(0);
     InputReg = InputReg ? MIRBuilder.buildOr(S32, InputReg, Y).getReg(0) : Y;
@@ -903,8 +904,8 @@ bool AMDGPUCallLowering::passSpecialInputs(MachineIRBuilder &MIRBuilder,
   if (IncomingArgZ && !IncomingArgZ->isMasked() && CalleeArgInfo->WorkItemIDZ &&
       NeedWorkItemIDZ && ST.getMaxWorkitemID(MF.getFunction(), 2) != 0) {
     Register Z = MRI.createGenericVirtualRegister(S32);
-    LI->loadInputValue(Z, MIRBuilder, IncomingArgZ, std::get<1>(WorkitemIDZ),
-                       std::get<2>(WorkitemIDZ));
+    LI->buildLoadInputValue(Z, MIRBuilder, IncomingArgZ,
+                            std::get<1>(WorkitemIDZ), std::get<2>(WorkitemIDZ));
 
     Z = MIRBuilder.buildShl(S32, Z, MIRBuilder.buildConstant(S32, 20)).getReg(0);
     InputReg = InputReg ? MIRBuilder.buildOr(S32, InputReg, Z).getReg(0) : Z;
@@ -925,8 +926,8 @@ bool AMDGPUCallLowering::passSpecialInputs(MachineIRBuilder &MIRBuilder,
       ArgDescriptor IncomingArg = ArgDescriptor::createArg(
         IncomingArgX ? *IncomingArgX :
         IncomingArgY ? *IncomingArgY : *IncomingArgZ, ~0u);
-      LI->loadInputValue(InputReg, MIRBuilder, &IncomingArg,
-                         &AMDGPU::VGPR_32RegClass, S32);
+      LI->buildLoadInputValue(InputReg, MIRBuilder, &IncomingArg,
+                              &AMDGPU::VGPR_32RegClass, S32);
     }
   }
 
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
index e9e47eaadd557f..908d323c7fec96 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -4275,10 +4275,11 @@ verifyCFIntrinsic(MachineInstr &MI, MachineRegisterInfo &MRI, MachineInstr *&Br,
   return UseMI;
 }
 
-bool AMDGPULegalizerInfo::loadInputValue(Register DstReg, MachineIRBuilder &B,
-                                         const ArgDescriptor *Arg,
-                                         const TargetRegisterClass *ArgRC,
-                                         LLT ArgTy) const {
+void AMDGPULegalizerInfo::buildLoadInputValue(Register DstReg,
+                                              MachineIRBuilder &B,
+                                              const ArgDescriptor *Arg,
+                                              const TargetRegisterClass *ArgRC,
+                                              LLT ArgTy) const {
   MCRegister SrcReg = Arg->getRegister();
   assert(SrcReg.isPhysical() && "Physical register expected");
   assert(DstReg.isVirtual() && "Virtual register expected");
@@ -4304,8 +4305,6 @@ bool AMDGPULegalizerInfo::loadInputValue(Register DstReg, MachineIRBuilder &B,
   } else {
     B.buildCopy(DstReg, LiveIn);
   }
-
-  return true;
 }
 
 bool AMDGPULegalizerInfo::loadInputValue(
@@ -4369,7 +4368,8 @@ bool AMDGPULegalizerInfo::loadInputValue(
 
   if (!Arg->isRegister() || !Arg->getRegister().isValid())
     return false; // TODO: Handle these
-  return loadInputValue(DstReg, B, Arg, ArgRC, ArgTy);
+  buildLoadInputValue(DstReg, B, Arg, ArgRC, ArgTy);
+  return true;
 }
 
 bool AMDGPULegalizerInfo::legalizePreloadedArgIntrin(
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h
index 86c15197805d23..03b7c36fc450f9 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h
+++ b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.h
@@ -111,9 +111,9 @@ class AMDGPULegalizerInfo final : public LegalizerInfo {
   bool legalizeCTLZ_ZERO_UNDEF(MachineInstr &MI, MachineRegisterInfo &MRI,
                                MachineIRBuilder &B) const;
 
-  bool loadInputValue(Register DstReg, MachineIRBuilder &B,
-                      const ArgDescriptor *Arg,
-                      const TargetRegisterClass *ArgRC, LLT ArgTy) const;
+  void buildLoadInputValue(Register DstReg, MachineIRBuilder &B,
+                           const ArgDescriptor *Arg,
+                           const TargetRegisterClass *ArgRC, LLT ArgTy) const;
   bool loadInputValue(Register DstReg, MachineIRBuilder &B,
                       AMDGPUFunctionArgInfo::PreloadedValue ArgType) const;
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/126739