diff --git a/src/mapleall/maple_be/src/be/becommon.cpp b/src/mapleall/maple_be/src/be/becommon.cpp
index 9dc0fd22b55b4bd90355ca795ea4383f9732fc88..fb19b70192a0c4eee50d889f6653d002519dc22e 100644
--- a/src/mapleall/maple_be/src/be/becommon.cpp
+++ b/src/mapleall/maple_be/src/be/becommon.cpp
@@ -134,7 +134,7 @@ void BECommon::ComputeStructTypeSizesAligns(MIRType &ty, const TyIdx &tyIdx) {
       SetTypeAlign(tyIdx.GetIdx(), 1);
     } else {
       SetTypeSize(tyIdx.GetIdx(), 0);
-      SetTypeAlign(tyIdx.GetIdx(), k8ByteSize);
+      SetTypeAlign(tyIdx.GetIdx(), 1);
     }
     return;
   }
diff --git a/src/mapleall/maple_ir/include/intrinsic_c.def b/src/mapleall/maple_ir/include/intrinsic_c.def
index 04080a4b0a901f1092b88a552bebf3b0af3af6b3..39a41aefb051ed038781be2c4e449015f1d89f90 100644
--- a/src/mapleall/maple_ir/include/intrinsic_c.def
+++ b/src/mapleall/maple_ir/include/intrinsic_c.def
@@ -20,10 +20,10 @@ DEF_MIR_INTRINSIC(C_strncmp,\
                   "strncmp", 1, INTRNNOSIDEEFFECT | INTRNISPURE, kArgTyI32, kArgTyPtr, kArgTyPtr, kArgTyU32)
 DEF_MIR_INTRINSIC(C_strcpy,\
                   "strcpy", 1, INTRNWRITEFIRSTOPND | INTRNREADSECONDOPND, \
-                  kArgTyVoid, kArgTyPtr, kArgTyPtr)
+                  kArgTyPtr, kArgTyPtr, kArgTyPtr)
 DEF_MIR_INTRINSIC(C_strncpy,\
                   "strncpy", 1, INTRNWRITEFIRSTOPND | INTRNREADSECONDOPND | INTRNREADTHIRDOPND, \
-                  kArgTyVoid, kArgTyPtr, kArgTyPtr, kArgTyU64)
+                  kArgTyPtr, kArgTyPtr, kArgTyPtr, kArgTyU64)
 DEF_MIR_INTRINSIC(C_strlen,\
                   "strlen", 1, INTRNNOSIDEEFFECT | INTRNISPURE, kArgTyU64, kArgTyPtr)
 DEF_MIR_INTRINSIC(C_strchr,\
@@ -34,12 +34,12 @@ DEF_MIR_INTRINSIC(C_memcmp,\
                   "memcmp", 1, INTRNNOSIDEEFFECT | INTRNISPURE, kArgTyI32, kArgTyPtr, kArgTyPtr, kArgTyU64)
 DEF_MIR_INTRINSIC(C_memcpy,\
                   "memcpy", 1, INTRNWRITEFIRSTOPND | INTRNREADSECONDOPND | INTRNREADTHIRDOPND, \
-                  kArgTyVoid, kArgTyPtr, kArgTyPtr, kArgTyU64)
+                  kArgTyPtr, kArgTyPtr, kArgTyPtr, kArgTyU64)
 DEF_MIR_INTRINSIC(C_memmove,\
-                  "memmove", 1, 0, kArgTyVoid, kArgTyPtr, kArgTyPtr, kArgTyU64)
+                  "memmove", 1, 0, kArgTyPtr, kArgTyPtr, kArgTyPtr, kArgTyU64)
 DEF_MIR_INTRINSIC(C_memset,\
                   "memset", 1, INTRNWRITEFIRSTOPND | INTRNREADSECONDOPND | INTRNREADTHIRDOPND, \
-                  kArgTyVoid, kArgTyPtr, kArgTyI32, kArgTyU64)
+                  kArgTyPtr, kArgTyPtr, kArgTyI32, kArgTyU64)
 DEF_MIR_INTRINSIC(C_acosf,\
                   "acosf", 1, INTRNISPURE, kArgTyF32, kArgTyF32)
 DEF_MIR_INTRINSIC(C_asinf,\
diff --git a/src/mapleall/maple_me/src/lmbc_lower.cpp b/src/mapleall/maple_me/src/lmbc_lower.cpp
index 0d3630bc5573bc6a86d4944e5354bfc8eef11b49..2f37c45083e18c39acfb913c1584676538c1fc1b 100644
--- a/src/mapleall/maple_me/src/lmbc_lower.cpp
+++ b/src/mapleall/maple_me/src/lmbc_lower.cpp
@@ -78,20 +78,29 @@ BaseNode *LMBCLowerer::LowerDread(AddrofNode *expr) {
   if (!symbol->LMBCAllocateOffSpecialReg()) {
     BaseNode *base = mirBuilder->CreateExprDreadoff(OP_addrofoff, LOWERED_PTR_TYPE, *symbol, 0);
     IreadoffNode *ireadoff = mirBuilder->CreateExprIreadoff(symty, offset, base);
-    return ireadoff;
+    if (GetPrimTypeSize(ireadoff->GetPrimType()) == GetPrimTypeSize(expr->GetPrimType())) {
+      return ireadoff;
+    }
+    return mirBuilder->CreateExprTypeCvt(OP_cvt, expr->GetPrimType(), GetRegPrimType(ireadoff->GetPrimType()), *ireadoff);
   }
   PregIdx spcreg = GetSpecialRegFromSt(symbol);
   if (spcreg == -kSregFp) {
     CHECK_FATAL(symbol->IsLocal(), "load from fp non local?");
     IreadFPoffNode *ireadoff = mirBuilder->CreateExprIreadFPoff(
         symty, memlayout->sym_alloc_table[symbol->GetStIndex()].offset + offset);
-    return ireadoff;
+    if (GetPrimTypeSize(ireadoff->GetPrimType()) == GetPrimTypeSize(expr->GetPrimType())) {
+      return ireadoff;
+    }
+    return mirBuilder->CreateExprTypeCvt(OP_cvt, expr->GetPrimType(), GetRegPrimType(ireadoff->GetPrimType()), *ireadoff);
   } else {
     BaseNode *rrn = mirBuilder->CreateExprRegread(LOWERED_PTR_TYPE, spcreg);
     SymbolAlloc &symalloc = symbol->IsLocal() ? memlayout->sym_alloc_table[symbol->GetStIndex()]
                                               : globmemlayout->sym_alloc_table[symbol->GetStIndex()];
     IreadoffNode *ireadoff = mirBuilder->CreateExprIreadoff(symty, symalloc.offset + offset, rrn);
-    return ireadoff;
+    if (GetPrimTypeSize(ireadoff->GetPrimType()) == GetPrimTypeSize(expr->GetPrimType())) {
+      return ireadoff;
+    }
+    return mirBuilder->CreateExprTypeCvt(OP_cvt, expr->GetPrimType(), GetRegPrimType(ireadoff->GetPrimType()), *ireadoff);
   }
 }
 
@@ -141,7 +150,10 @@ BaseNode *LMBCLowerer::LowerIread(IreadNode *expr) {
     type = structty->GetFieldType(expr->GetFieldID());
   }
   BaseNode *ireadoff = mirBuilder->CreateExprIreadoff(type->GetPrimType(), offset, expr->Opnd(0));
-  return ireadoff;
+  if (GetPrimTypeSize(ireadoff->GetPrimType()) == GetPrimTypeSize(expr->GetPrimType())) {
+    return ireadoff;
+  }
+  return mirBuilder->CreateExprTypeCvt(OP_cvt, expr->GetPrimType(), GetRegPrimType(ireadoff->GetPrimType()), *ireadoff);
 }
 
 BaseNode *LMBCLowerer::LowerIaddrof(IaddrofNode *expr) {