[AIEX] update matchNarrowTruncLoad to accept G_INTTOPTR

Author: F-Stuckmann

llvm/lib/Target/AIE/AIECombinerHelper.cpp

@@ -3405,7 +3405,8 @@ static bool isUsedByLikelyLegalS20User(MachineRegisterInfo &MRI,
                          UseMI.getOpcode() == TargetOpcode::G_STORE ||
                          UseMI.getOpcode() == TargetOpcode::G_INTRINSIC ||
                          UseMI.getOpcode() ==
-                             TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS;
+                             TargetOpcode::G_INTRINSIC_W_SIDE_EFFECTS ||
+                         UseMI.getOpcode() == TargetOpcode::G_INTTOPTR;
                 });
 }
 

llvm/test/CodeGen/AIE/GlobalISel/combine-trunc-to-s20.mir

@@ -316,9 +316,8 @@ body:             |
     ; CHECK: liveins: $p0
     ; CHECK-NEXT: {{  $}}
     ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $p0
-    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s24) = G_LOAD [[COPY]](p0) :: (dereferenceable load (s24), align 4)
-    ; CHECK-NEXT: [[TRUNC:%[0-9]+]]:_(s20) = G_TRUNC [[LOAD]](s24)
-    ; CHECK-NEXT: [[INTTOPTR:%[0-9]+]]:_(p0) = G_INTTOPTR [[TRUNC]](s20)
+    ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s20) = G_LOAD [[COPY]](p0) :: (dereferenceable load (s20), align 4)
+    ; CHECK-NEXT: [[INTTOPTR:%[0-9]+]]:_(p0) = G_INTTOPTR [[LOAD]](s20)
     ; CHECK-NEXT: $p0 = COPY [[INTTOPTR]](p0)
     %0:_(p0) = COPY $p0
     %1:_(s24) = G_LOAD %0:_(p0) :: (dereferenceable load (s24), align 4)