[AMDGPU] Add missing test checks. NFC. (#69484)

Author: rampitec

llvm/test/CodeGen/AMDGPU/fold-short-64-bit-literals.mir

@@ -106,6 +106,11 @@ tracksRegLiveness: true
 body:             |
   bb.0:
 
+    ; GCN-LABEL: name: no_fold_v2fp_64bit_literal_sgpr
+    ; GCN: [[DEF:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
+    ; GCN-NEXT: [[V_MOV_B:%[0-9]+]]:vreg_64 = V_MOV_B64_PSEUDO 4629700418019000320, implicit $exec
+    ; GCN-NEXT: [[V_PK_ADD_F32_:%[0-9]+]]:vreg_64 = V_PK_ADD_F32 0, [[DEF]], 0, [[V_MOV_B]], 0, 0, 0, 0, 0, implicit $mode, implicit $exec
+    ; GCN-NEXT: SI_RETURN_TO_EPILOG [[V_PK_ADD_F32_]]
     %0:vreg_64 = IMPLICIT_DEF
     %1:vreg_64 = V_MOV_B64_PSEUDO 4629700418019000320, implicit $exec
     %2:vreg_64 = V_PK_ADD_F32 0, %0, 0, %1, 0, 0, 0, 0, 0, implicit $mode, implicit $exec
@@ -118,6 +123,10 @@ tracksRegLiveness: true
 body:             |
   bb.0:
 
+    ; GCN-LABEL: name: fold_v2fp_32bit_literal_sgpr
+    ; GCN: [[DEF:%[0-9]+]]:vreg_64 = IMPLICIT_DEF
+    ; GCN-NEXT: [[V_PK_ADD_F32_:%[0-9]+]]:vreg_64 = V_PK_ADD_F32 0, [[DEF]], 0, 1065353216, 0, 0, 0, 0, 0, implicit $mode, implicit $exec
+    ; GCN-NEXT: SI_RETURN_TO_EPILOG [[V_PK_ADD_F32_]]
     %0:vreg_64 = IMPLICIT_DEF
     %1:vreg_64 = V_MOV_B64_PSEUDO 1065353216, implicit $exec
     %2:vreg_64 = V_PK_ADD_F32 0, %0, 0, %1, 0, 0, 0, 0, 0, implicit $mode, implicit $exec