[Hexagon] Mark instructions as part of the frame setup to fix test sugared-constants.ll (#111795)

Added .setMIFlag(MachineInstr::FrameSetup) to all BuildMI calls in
HexagonFrameLowering::insertAllocframe. This change ensures that the
test sugared-constants.ll passes upstream by correctly marking
instructions as part of the frame setup.

Author: pkarveti

llvm/lib/Target/Hexagon/HexagonFrameLowering.cpp

@@ -906,22 +906,25 @@ void HexagonFrameLowering::insertAllocframe(MachineBasicBlock &MBB,
   if (NumBytes >= ALLOCFRAME_MAX) {
     // Emit allocframe(#0).
     BuildMI(MBB, InsertPt, dl, HII.get(Hexagon::S2_allocframe))
-      .addDef(SP)
-      .addReg(SP)
-      .addImm(0)
-      .addMemOperand(MMO);
+        .addDef(SP)
+        .addReg(SP)
+        .addImm(0)
+        .addMemOperand(MMO)
+        .setMIFlag(MachineInstr::FrameSetup);
 
     // Subtract the size from the stack pointer.
     Register SP = HRI.getStackRegister();
     BuildMI(MBB, InsertPt, dl, HII.get(Hexagon::A2_addi), SP)
-      .addReg(SP)
-      .addImm(-int(NumBytes));
+        .addReg(SP)
+        .addImm(-int(NumBytes))
+        .setMIFlag(MachineInstr::FrameSetup);
   } else {
     BuildMI(MBB, InsertPt, dl, HII.get(Hexagon::S2_allocframe))
-      .addDef(SP)
-      .addReg(SP)
-      .addImm(NumBytes)
-      .addMemOperand(MMO);
+        .addDef(SP)
+        .addReg(SP)
+        .addImm(NumBytes)
+        .addMemOperand(MMO)
+        .setMIFlag(MachineInstr::FrameSetup);
   }
 }
 

llvm/test/DebugInfo/Generic/sugared-constants.ll

@@ -1,7 +1,3 @@
-; xfail this test on hexagon because upstream llc is not emitting the
-; correct DWARF info. Downstream llc is.
-; XFAIL: target=hexagon-{{.*}}
-
 ; RUN: %llc_dwarf -O0 -filetype=obj %s -o - | llvm-dwarfdump -v -debug-info - | FileCheck %s
 ; Use correct signedness when emitting constants of derived (sugared) types.