[clang][bytecode][NFC] Add some popToAPSInt convenience API (#159252)

Add a variant that takes a QualType and one that takes an expression.
That way we don't have to repeat the clunky classify() calls all over
the place.

Author: tbaederr

clang/lib/AST/ByteCode/InterpBuiltin.cpp

@@ -49,6 +49,13 @@ static APSInt popToAPSInt(InterpStack &Stk, PrimType T) {
   INT_TYPE_SWITCH(T, return Stk.pop<T>().toAPSInt());
 }
 
+static APSInt popToAPSInt(InterpState &S, const Expr *E) {
+  return popToAPSInt(S.Stk, *S.getContext().classify(E->getType()));
+}
+static APSInt popToAPSInt(InterpState &S, QualType T) {
+  return popToAPSInt(S.Stk, *S.getContext().classify(T));
+}
+
 /// Pushes \p Val on the stack as the type given by \p QT.
 static void pushInteger(InterpState &S, const APSInt &Val, QualType QT) {
   assert(QT->isSignedIntegerOrEnumerationType() ||
@@ -1350,11 +1357,8 @@ static bool interp__builtin_ia32_bzhi(InterpState &S, CodePtr OpPC,
       !CallType->isIntegerType())
     return false;
 
-  PrimType ValT = *S.Ctx.classify(Call->getArg(0));
-  PrimType IndexT = *S.Ctx.classify(Call->getArg(1));
-
-  APSInt Idx = popToAPSInt(S.Stk, IndexT);
-  APSInt Val = popToAPSInt(S.Stk, ValT);
+  APSInt Idx = popToAPSInt(S, Call->getArg(1));
+  APSInt Val = popToAPSInt(S, Call->getArg(0));
 
   unsigned BitWidth = Val.getBitWidth();
   uint64_t Index = Idx.extractBitsAsZExtValue(8, 0);
@@ -1374,7 +1378,7 @@ static bool interp__builtin_ia32_lzcnt(InterpState &S, CodePtr OpPC,
       !Call->getArg(0)->getType()->isIntegerType())
     return false;
 
-  APSInt Val = popToAPSInt(S.Stk, *S.Ctx.classify(Call->getArg(0)));
+  APSInt Val = popToAPSInt(S, Call->getArg(0));
   pushInteger(S, Val.countLeadingZeros(), CallType);
   return true;
 }
@@ -1387,7 +1391,7 @@ static bool interp__builtin_ia32_tzcnt(InterpState &S, CodePtr OpPC,
       !Call->getArg(0)->getType()->isIntegerType())
     return false;
 
-  APSInt Val = popToAPSInt(S.Stk, *S.Ctx.classify(Call->getArg(0)));
+  APSInt Val = popToAPSInt(S, Call->getArg(0));
   pushInteger(S, Val.countTrailingZeros(), CallType);
   return true;
 }
@@ -1399,11 +1403,8 @@ static bool interp__builtin_ia32_pdep(InterpState &S, CodePtr OpPC,
       !Call->getArg(1)->getType()->isIntegerType())
     return false;
 
-  PrimType ValT = *S.Ctx.classify(Call->getArg(0));
-  PrimType MaskT = *S.Ctx.classify(Call->getArg(1));
-
-  APSInt Mask = popToAPSInt(S.Stk, MaskT);
-  APSInt Val = popToAPSInt(S.Stk, ValT);
+  APSInt Mask = popToAPSInt(S, Call->getArg(1));
+  APSInt Val = popToAPSInt(S, Call->getArg(0));
 
   unsigned BitWidth = Val.getBitWidth();
   APInt Result = APInt::getZero(BitWidth);
@@ -1422,11 +1423,8 @@ static bool interp__builtin_ia32_pext(InterpState &S, CodePtr OpPC,
       !Call->getArg(1)->getType()->isIntegerType())
     return false;
 
-  PrimType ValT = *S.Ctx.classify(Call->getArg(0));
-  PrimType MaskT = *S.Ctx.classify(Call->getArg(1));
-
-  APSInt Mask = popToAPSInt(S.Stk, MaskT);
-  APSInt Val = popToAPSInt(S.Stk, ValT);
+  APSInt Mask = popToAPSInt(S, Call->getArg(1));
+  APSInt Val = popToAPSInt(S, Call->getArg(0));
 
   unsigned BitWidth = Val.getBitWidth();
   APInt Result = APInt::getZero(BitWidth);
@@ -1451,12 +1449,9 @@ static bool interp__builtin_ia32_addcarry_subborrow(InterpState &S,
 
   const Pointer &CarryOutPtr = S.Stk.pop<Pointer>();
 
-  PrimType CarryInT = *S.getContext().classify(Call->getArg(0));
-  PrimType LHST = *S.getContext().classify(Call->getArg(1));
-  PrimType RHST = *S.getContext().classify(Call->getArg(2));
-  APSInt RHS = popToAPSInt(S.Stk, RHST);
-  APSInt LHS = popToAPSInt(S.Stk, LHST);
-  APSInt CarryIn = popToAPSInt(S.Stk, CarryInT);
+  APSInt RHS = popToAPSInt(S, Call->getArg(2));
+  APSInt LHS = popToAPSInt(S, Call->getArg(1));
+  APSInt CarryIn = popToAPSInt(S, Call->getArg(0));
 
   bool IsAdd = BuiltinOp == clang::X86::BI__builtin_ia32_addcarryx_u32 ||
                BuiltinOp == clang::X86::BI__builtin_ia32_addcarryx_u64;
@@ -1546,7 +1541,7 @@ static bool interp__builtin_operator_new(InterpState &S, CodePtr OpPC,
       discard(S.Stk, *S.getContext().classify(Arg));
   }
 
-  APSInt Bytes = popToAPSInt(S.Stk, *S.getContext().classify(Call->getArg(0)));
+  APSInt Bytes = popToAPSInt(S, Call->getArg(0));
   CharUnits ElemSize = S.getASTContext().getTypeSizeInChars(ElemType);
   assert(!ElemSize.isZero());
   // Divide the number of bytes by sizeof(ElemType), so we get the number of
@@ -1740,9 +1735,7 @@ static bool interp__builtin_elementwise_abs(InterpState &S, CodePtr OpPC,
   assert(Call->getNumArgs() == 1);
   QualType Ty = Call->getArg(0)->getType();
   if (Ty->isIntegerType()) {
-    PrimType ArgT = *S.getContext().classify(Call->getArg(0)->getType());
-    APSInt Val = popToAPSInt(S.Stk, ArgT);
-
+    APSInt Val = popToAPSInt(S, Call->getArg(0));
     pushInteger(S, Val.abs(), Call->getType());
     return true;
   }
@@ -1791,8 +1784,7 @@ static bool interp__builtin_elementwise_popcount(InterpState &S, CodePtr OpPC,
                                                  unsigned BuiltinID) {
   assert(Call->getNumArgs() == 1);
   if (Call->getArg(0)->getType()->isIntegerType()) {
-    PrimType ArgT = *S.getContext().classify(Call->getArg(0)->getType());
-    APSInt Val = popToAPSInt(S.Stk, ArgT);
+    APSInt Val = popToAPSInt(S, Call->getArg(0));
 
     if (BuiltinID == Builtin::BI__builtin_elementwise_popcount) {
       pushInteger(S, Val.popcount(), Call->getType());
@@ -1923,8 +1915,7 @@ static bool interp__builtin_memcpy(InterpState &S, CodePtr OpPC,
                                    const CallExpr *Call, unsigned ID) {
   assert(Call->getNumArgs() == 3);
   const ASTContext &ASTCtx = S.getASTContext();
-  PrimType SizeT = *S.getContext().classify(Call->getArg(2));
-  APSInt Size = popToAPSInt(S.Stk, SizeT);
+  APSInt Size = popToAPSInt(S, Call->getArg(2));
   const Pointer SrcPtr = S.Stk.pop<Pointer>();
   const Pointer DestPtr = S.Stk.pop<Pointer>();
 
@@ -2090,8 +2081,7 @@ static bool interp__builtin_memcmp(InterpState &S, CodePtr OpPC,
                                    const InterpFrame *Frame,
                                    const CallExpr *Call, unsigned ID) {
   assert(Call->getNumArgs() == 3);
-  PrimType SizeT = *S.getContext().classify(Call->getArg(2));
-  const APSInt &Size = popToAPSInt(S.Stk, SizeT);
+  const APSInt &Size = popToAPSInt(S, Call->getArg(2));
   const Pointer &PtrB = S.Stk.pop<Pointer>();
   const Pointer &PtrA = S.Stk.pop<Pointer>();
 
@@ -2206,12 +2196,10 @@ static bool interp__builtin_memchr(InterpState &S, CodePtr OpPC,
     diagnoseNonConstexprBuiltin(S, OpPC, ID);
 
   std::optional<APSInt> MaxLength;
-  PrimType DesiredT = *S.getContext().classify(Call->getArg(1));
-  if (Call->getNumArgs() == 3) {
-    PrimType MaxT = *S.getContext().classify(Call->getArg(2));
-    MaxLength = popToAPSInt(S.Stk, MaxT);
-  }
-  APSInt Desired = popToAPSInt(S.Stk, DesiredT);
+  if (Call->getNumArgs() == 3)
+    MaxLength = popToAPSInt(S, Call->getArg(2));
+
+  APSInt Desired = popToAPSInt(S, Call->getArg(1));
   const Pointer &Ptr = S.Stk.pop<Pointer>();
 
   if (MaxLength && MaxLength->isZero()) {
@@ -2428,13 +2416,12 @@ static bool interp__builtin_object_size(InterpState &S, CodePtr OpPC,
                                         const InterpFrame *Frame,
                                         const CallExpr *Call) {
   const ASTContext &ASTCtx = S.getASTContext();
-  PrimType KindT = *S.getContext().classify(Call->getArg(1));
   // From the GCC docs:
   // Kind is an integer constant from 0 to 3. If the least significant bit is
   // clear, objects are whole variables. If it is set, a closest surrounding
   // subobject is considered the object a pointer points to. The second bit
   // determines if maximum or minimum of remaining bytes is computed.
-  unsigned Kind = popToAPSInt(S.Stk, KindT).getZExtValue();
+  unsigned Kind = popToAPSInt(S, Call->getArg(1)).getZExtValue();
   assert(Kind <= 3 && "unexpected kind");
   bool UseFieldDesc = (Kind & 1u);
   bool ReportMinimum = (Kind & 2u);
@@ -2562,10 +2549,8 @@ static bool interp__builtin_elementwise_int_binop(
   // Single integer case.
   if (!Call->getArg(0)->getType()->isVectorType()) {
     assert(!Call->getArg(1)->getType()->isVectorType());
-    APSInt RHS = popToAPSInt(
-        S.Stk, *S.getContext().classify(Call->getArg(1)->getType()));
-    APSInt LHS = popToAPSInt(
-        S.Stk, *S.getContext().classify(Call->getArg(0)->getType()));
+    APSInt RHS = popToAPSInt(S, Call->getArg(1));
+    APSInt LHS = popToAPSInt(S, Call->getArg(0));
     APInt Result = Fn(LHS, RHS);
     pushInteger(S, APSInt(std::move(Result), !LHS.isSigned()), Call->getType());
     return true;
@@ -2581,8 +2566,7 @@ static bool interp__builtin_elementwise_int_binop(
   if (!Call->getArg(1)->getType()->isVectorType()) {
     assert(Call->getArg(1)->getType()->isIntegralOrEnumerationType());
 
-    APSInt RHS = popToAPSInt(
-        S.Stk, *S.getContext().classify(Call->getArg(1)->getType()));
+    APSInt RHS = popToAPSInt(S, Call->getArg(1));
     const Pointer &LHS = S.Stk.pop<Pointer>();
     const Pointer &Dst = S.Stk.peek<Pointer>();
 
@@ -2635,10 +2619,8 @@ static bool interp__builtin_elementwise_maxmin(InterpState &S, CodePtr OpPC,
 
   if (!Arg0Type->isVectorType()) {
     assert(!Call->getArg(1)->getType()->isVectorType());
-    APSInt RHS = popToAPSInt(
-        S.Stk, *S.getContext().classify(Call->getArg(1)->getType()));
-    APSInt LHS = popToAPSInt(
-        S.Stk, *S.getContext().classify(Call->getArg(0)->getType()));
+    APSInt RHS = popToAPSInt(S, Call->getArg(1));
+    APSInt LHS = popToAPSInt(S, Arg0Type);
     APInt Result;
     if (BuiltinID == Builtin::BI__builtin_elementwise_max) {
       Result = std::max(LHS, RHS);
@@ -2808,8 +2790,7 @@ static bool interp__builtin_select(InterpState &S, CodePtr OpPC,
                                    const CallExpr *Call) {
   const Pointer &RHS = S.Stk.pop<Pointer>();
   const Pointer &LHS = S.Stk.pop<Pointer>();
-  PrimType MaskT = *S.getContext().classify(Call->getArg(0));
-  APSInt Mask = popToAPSInt(S.Stk, MaskT);
+  APSInt Mask = popToAPSInt(S, Call->getArg(0));
   const Pointer &Dst = S.Stk.peek<Pointer>();
 
   assert(LHS.getNumElems() == RHS.getNumElems());
@@ -2839,8 +2820,7 @@ static bool interp__builtin_select(InterpState &S, CodePtr OpPC,
 
 static bool interp__builtin_blend(InterpState &S, CodePtr OpPC,
                                   const CallExpr *Call) {
-  PrimType MaskT = *S.getContext().classify(Call->getArg(2));
-  APSInt Mask = popToAPSInt(S.Stk, MaskT);
+  APSInt Mask = popToAPSInt(S, Call->getArg(2));
   const Pointer &TrueVec = S.Stk.pop<Pointer>();
   const Pointer &FalseVec = S.Stk.pop<Pointer>();
   const Pointer &Dst = S.Stk.peek<Pointer>();
@@ -2878,14 +2858,12 @@ static bool interp__builtin_elementwise_triop(
   assert(Call->getNumArgs() == 3);
 
   QualType Arg0Type = Call->getArg(0)->getType();
-  QualType Arg1Type = Call->getArg(1)->getType();
   QualType Arg2Type = Call->getArg(2)->getType();
-
   // Non-vector integer types.
   if (!Arg0Type->isVectorType()) {
-    const APSInt &Op2 = popToAPSInt(S.Stk, *S.getContext().classify(Arg2Type));
-    const APSInt &Op1 = popToAPSInt(S.Stk, *S.getContext().classify(Arg1Type));
-    const APSInt &Op0 = popToAPSInt(S.Stk, *S.getContext().classify(Arg0Type));
+    const APSInt &Op2 = popToAPSInt(S, Arg2Type);
+    const APSInt &Op1 = popToAPSInt(S, Call->getArg(1));
+    const APSInt &Op0 = popToAPSInt(S, Arg0Type);
     APSInt Result = APSInt(Fn(Op0, Op1, Op2), Op0.isUnsigned());
     pushInteger(S, Result, Call->getType());
     return true;
@@ -2898,8 +2876,7 @@ static bool interp__builtin_elementwise_triop(
 
   // Vector + Vector + Scalar case.
   if (!Arg2Type->isVectorType()) {
-    APSInt Op2 = popToAPSInt(
-        S.Stk, *S.getContext().classify(Call->getArg(2)->getType()));
+    APSInt Op2 = popToAPSInt(S, Arg2Type);
 
     const Pointer &Op1 = S.Stk.pop<Pointer>();
     const Pointer &Op0 = S.Stk.pop<Pointer>();