[RISCV] Add correct MachinePointerInfo when putting arguments on the stack. (#110140)

Previously we used an empty MachinePointerInfo. I checked a few other
targets like X86, ARM, and AArch64 and they all appear to use correct
MachinePointerInfo.

Author: topperc

llvm/lib/Target/RISCV/RISCVISelLowering.cpp

@@ -19640,8 +19640,9 @@ SDValue RISCVTargetLowering::LowerCall(CallLoweringInfo &CLI,
             DAG.getNode(ISD::ADD, DL, PtrVT, StackPtr,
                         DAG.getIntPtrConstant(HiVA.getLocMemOffset(), DL));
         // Emit the store.
-        MemOpChains.push_back(
-            DAG.getStore(Chain, DL, Hi, Address, MachinePointerInfo()));
+        MemOpChains.push_back(DAG.getStore(
+            Chain, DL, Hi, Address,
+            MachinePointerInfo::getStack(MF, HiVA.getLocMemOffset())));
       } else {
         // Second half of f64 is passed in another GPR.
         Register RegHigh = HiVA.getLocReg();
@@ -19723,7 +19724,8 @@ SDValue RISCVTargetLowering::LowerCall(CallLoweringInfo &CLI,
 
       // Emit the store.
       MemOpChains.push_back(
-          DAG.getStore(Chain, DL, ArgValue, Address, MachinePointerInfo()));
+          DAG.getStore(Chain, DL, ArgValue, Address,
+                       MachinePointerInfo::getStack(MF, VA.getLocMemOffset())));
     }
   }
 

llvm/test/CodeGen/RISCV/pr97304.ll

@@ -17,7 +17,7 @@ define i32 @_ZNK2cv12LMSolverImpl3runERKNS_17_InputOutputArrayE(i1 %cmp436) {
   ; CHECK-NEXT:   ADJCALLSTACKDOWN 8, 0, implicit-def dead $x2, implicit $x2
   ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:gpr = COPY $x2
   ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:gprjalr = COPY $x0
-  ; CHECK-NEXT:   SD [[COPY3]], [[COPY2]], 0 :: (store (s64))
+  ; CHECK-NEXT:   SD [[COPY3]], [[COPY2]], 0 :: (store (s64) into stack)
   ; CHECK-NEXT:   [[ADDI:%[0-9]+]]:gpr = ADDI $x0, 1
   ; CHECK-NEXT:   [[ADDI1:%[0-9]+]]:gpr = ADDI $x0, 32
   ; CHECK-NEXT:   BNE [[ANDI]], $x0, %bb.3