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-rw-r--r--clang/lib/Sema/SemaExpr.cpp74
1 files changed, 48 insertions, 26 deletions
diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp
index 8921d851ffb..9a83c5cb440 100644
--- a/clang/lib/Sema/SemaExpr.cpp
+++ b/clang/lib/Sema/SemaExpr.cpp
@@ -4376,10 +4376,11 @@ ExprResult Sema::ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc,
return ExprError();
if (LowerBound && !OriginalTy->isAnyPointerType()) {
- llvm::APSInt LowerBoundValue;
- if (LowerBound->EvaluateAsInt(LowerBoundValue, Context)) {
+ Expr::EvalResult Result;
+ if (LowerBound->EvaluateAsInt(Result, Context)) {
// OpenMP 4.5, [2.4 Array Sections]
// The array section must be a subset of the original array.
+ llvm::APSInt LowerBoundValue = Result.Val.getInt();
if (LowerBoundValue.isNegative()) {
Diag(LowerBound->getExprLoc(), diag::err_omp_section_not_subset_of_array)
<< LowerBound->getSourceRange();
@@ -4389,10 +4390,11 @@ ExprResult Sema::ActOnOMPArraySectionExpr(Expr *Base, SourceLocation LBLoc,
}
if (Length) {
- llvm::APSInt LengthValue;
- if (Length->EvaluateAsInt(LengthValue, Context)) {
+ Expr::EvalResult Result;
+ if (Length->EvaluateAsInt(Result, Context)) {
// OpenMP 4.5, [2.4 Array Sections]
// The length must evaluate to non-negative integers.
+ llvm::APSInt LengthValue = Result.Val.getInt();
if (LengthValue.isNegative()) {
Diag(Length->getExprLoc(), diag::err_omp_section_length_negative)
<< LengthValue.toString(/*Radix=*/10, /*Signed=*/true)
@@ -5799,6 +5801,13 @@ Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo,
? VK_RValue
: VK_LValue;
+ if (isFileScope)
+ if (auto ILE = dyn_cast<InitListExpr>(LiteralExpr))
+ for (unsigned i = 0, j = ILE->getNumInits(); i != j; i++) {
+ Expr *Init = ILE->getInit(i);
+ ILE->setInit(i, ConstantExpr::Create(Context, Init));
+ }
+
Expr *E = new (Context) CompoundLiteralExpr(LParenLoc, TInfo, literalType,
VK, LiteralExpr, isFileScope);
if (isFileScope) {
@@ -5807,7 +5816,6 @@ Sema::BuildCompoundLiteralExpr(SourceLocation LParenLoc, TypeSourceInfo *TInfo,
!literalType->isDependentType()) // C99 6.5.2.5p3
if (CheckForConstantInitializer(LiteralExpr, literalType))
return ExprError();
- E = new (Context) ConstantExpr(E);
} else if (literalType.getAddressSpace() != LangAS::opencl_private &&
literalType.getAddressSpace() != LangAS::Default) {
// Embedded-C extensions to C99 6.5.2.5:
@@ -8403,8 +8411,8 @@ static bool canConvertIntToOtherIntTy(Sema &S, ExprResult *Int,
// Reject cases where the value of the Int is unknown as that would
// possibly cause truncation, but accept cases where the scalar can be
// demoted without loss of precision.
- llvm::APSInt Result;
- bool CstInt = Int->get()->EvaluateAsInt(Result, S.Context);
+ Expr::EvalResult EVResult;
+ bool CstInt = Int->get()->EvaluateAsInt(EVResult, S.Context);
int Order = S.Context.getIntegerTypeOrder(OtherIntTy, IntTy);
bool IntSigned = IntTy->hasSignedIntegerRepresentation();
bool OtherIntSigned = OtherIntTy->hasSignedIntegerRepresentation();
@@ -8412,6 +8420,7 @@ static bool canConvertIntToOtherIntTy(Sema &S, ExprResult *Int,
if (CstInt) {
// If the scalar is constant and is of a higher order and has more active
// bits that the vector element type, reject it.
+ llvm::APSInt Result = EVResult.Val.getInt();
unsigned NumBits = IntSigned
? (Result.isNegative() ? Result.getMinSignedBits()
: Result.getActiveBits())
@@ -8439,8 +8448,9 @@ static bool canConvertIntTyToFloatTy(Sema &S, ExprResult *Int,
// Determine if the integer constant can be expressed as a floating point
// number of the appropriate type.
- llvm::APSInt Result;
- bool CstInt = Int->get()->EvaluateAsInt(Result, S.Context);
+ Expr::EvalResult EVResult;
+ bool CstInt = Int->get()->EvaluateAsInt(EVResult, S.Context);
+
uint64_t Bits = 0;
if (CstInt) {
// Reject constants that would be truncated if they were converted to
@@ -8448,6 +8458,7 @@ static bool canConvertIntTyToFloatTy(Sema &S, ExprResult *Int,
// FIXME: Ideally the conversion to an APFloat and from an APFloat
// could be avoided if there was a convertFromAPInt method
// which could signal back if implicit truncation occurred.
+ llvm::APSInt Result = EVResult.Val.getInt();
llvm::APFloat Float(S.Context.getFloatTypeSemantics(FloatTy));
Float.convertFromAPInt(Result, IntTy->hasSignedIntegerRepresentation(),
llvm::APFloat::rmTowardZero);
@@ -8787,9 +8798,10 @@ static void DiagnoseBadDivideOrRemainderValues(Sema& S, ExprResult &LHS,
ExprResult &RHS,
SourceLocation Loc, bool IsDiv) {
// Check for division/remainder by zero.
- llvm::APSInt RHSValue;
+ Expr::EvalResult RHSValue;
if (!RHS.get()->isValueDependent() &&
- RHS.get()->EvaluateAsInt(RHSValue, S.Context) && RHSValue == 0)
+ RHS.get()->EvaluateAsInt(RHSValue, S.Context) &&
+ RHSValue.Val.getInt() == 0)
S.DiagRuntimeBehavior(Loc, RHS.get(),
S.PDiag(diag::warn_remainder_division_by_zero)
<< IsDiv << RHS.get()->getSourceRange());
@@ -9031,8 +9043,9 @@ static void diagnoseStringPlusInt(Sema &Self, SourceLocation OpLoc,
if (!IsStringPlusInt || IndexExpr->isValueDependent())
return;
- llvm::APSInt index;
- if (IndexExpr->EvaluateAsInt(index, Self.getASTContext())) {
+ Expr::EvalResult Result;
+ if (IndexExpr->EvaluateAsInt(Result, Self.getASTContext())) {
+ llvm::APSInt index = Result.Val.getInt();
unsigned StrLenWithNull = StrExpr->getLength() + 1;
if (index.isNonNegative() &&
index <= llvm::APSInt(llvm::APInt(index.getBitWidth(), StrLenWithNull),
@@ -9176,10 +9189,11 @@ QualType Sema::CheckAdditionOperands(ExprResult &LHS, ExprResult &RHS,
if (PExp->IgnoreParenCasts()->isNullPointerConstant(
Context, Expr::NPC_ValueDependentIsNotNull)) {
// In C++ adding zero to a null pointer is defined.
- llvm::APSInt KnownVal;
+ Expr::EvalResult KnownVal;
if (!getLangOpts().CPlusPlus ||
(!IExp->isValueDependent() &&
- (!IExp->EvaluateAsInt(KnownVal, Context) || KnownVal != 0))) {
+ (!IExp->EvaluateAsInt(KnownVal, Context) ||
+ KnownVal.Val.getInt() != 0))) {
// Check the conditions to see if this is the 'p = nullptr + n' idiom.
bool IsGNUIdiom = BinaryOperator::isNullPointerArithmeticExtension(
Context, BO_Add, PExp, IExp);
@@ -9254,10 +9268,11 @@ QualType Sema::CheckSubtractionOperands(ExprResult &LHS, ExprResult &RHS,
if (LHS.get()->IgnoreParenCasts()->isNullPointerConstant(Context,
Expr::NPC_ValueDependentIsNotNull)) {
// In C++ adding zero to a null pointer is defined.
- llvm::APSInt KnownVal;
+ Expr::EvalResult KnownVal;
if (!getLangOpts().CPlusPlus ||
(!RHS.get()->isValueDependent() &&
- (!RHS.get()->EvaluateAsInt(KnownVal, Context) || KnownVal != 0))) {
+ (!RHS.get()->EvaluateAsInt(KnownVal, Context) ||
+ KnownVal.Val.getInt() != 0))) {
diagnoseArithmeticOnNullPointer(*this, Loc, LHS.get(), false);
}
}
@@ -9333,11 +9348,12 @@ static void DiagnoseBadShiftValues(Sema& S, ExprResult &LHS, ExprResult &RHS,
if (S.getLangOpts().OpenCL)
return;
- llvm::APSInt Right;
// Check right/shifter operand
+ Expr::EvalResult RHSResult;
if (RHS.get()->isValueDependent() ||
- !RHS.get()->EvaluateAsInt(Right, S.Context))
+ !RHS.get()->EvaluateAsInt(RHSResult, S.Context))
return;
+ llvm::APSInt Right = RHSResult.Val.getInt();
if (Right.isNegative()) {
S.DiagRuntimeBehavior(Loc, RHS.get(),
@@ -9360,11 +9376,12 @@ static void DiagnoseBadShiftValues(Sema& S, ExprResult &LHS, ExprResult &RHS,
// according to C++ has undefined behavior ([expr.shift] 5.8/2). Unsigned
// integers have defined behavior modulo one more than the maximum value
// representable in the result type, so never warn for those.
- llvm::APSInt Left;
+ Expr::EvalResult LHSResult;
if (LHS.get()->isValueDependent() ||
LHSType->hasUnsignedIntegerRepresentation() ||
- !LHS.get()->EvaluateAsInt(Left, S.Context))
+ !LHS.get()->EvaluateAsInt(LHSResult, S.Context))
return;
+ llvm::APSInt Left = LHSResult.Val.getInt();
// If LHS does not have a signed type and non-negative value
// then, the behavior is undefined. Warn about it.
@@ -10734,8 +10751,9 @@ inline QualType Sema::CheckLogicalOperands(ExprResult &LHS, ExprResult &RHS,
// that isn't 0 or 1 (which indicate a potential logical operation that
// happened to fold to true/false) then warn.
// Parens on the RHS are ignored.
- llvm::APSInt Result;
- if (RHS.get()->EvaluateAsInt(Result, Context))
+ Expr::EvalResult EVResult;
+ if (RHS.get()->EvaluateAsInt(EVResult, Context)) {
+ llvm::APSInt Result = EVResult.Val.getInt();
if ((getLangOpts().Bool && !RHS.get()->getType()->isBooleanType() &&
!RHS.get()->getExprLoc().isMacroID()) ||
(Result != 0 && Result != 1)) {
@@ -10755,6 +10773,7 @@ inline QualType Sema::CheckLogicalOperands(ExprResult &LHS, ExprResult &RHS,
SourceRange(getLocForEndOfToken(LHS.get()->getEndLoc()),
RHS.get()->getEndLoc()));
}
+ }
}
if (!Context.getLangOpts().CPlusPlus) {
@@ -14170,12 +14189,15 @@ Sema::VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
return ExprError();
}
+ if (!isa<ConstantExpr>(E))
+ E = ConstantExpr::Create(Context, E);
+
// Circumvent ICE checking in C++11 to avoid evaluating the expression twice
// in the non-ICE case.
if (!getLangOpts().CPlusPlus11 && E->isIntegerConstantExpr(Context)) {
if (Result)
*Result = E->EvaluateKnownConstIntCheckOverflow(Context);
- return new (Context) ConstantExpr(E);
+ return E;
}
Expr::EvalResult EvalResult;
@@ -14193,7 +14215,7 @@ Sema::VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
if (Folded && getLangOpts().CPlusPlus11 && Notes.empty()) {
if (Result)
*Result = EvalResult.Val.getInt();
- return new (Context) ConstantExpr(E);
+ return E;
}
// If our only note is the usual "invalid subexpression" note, just point
@@ -14221,7 +14243,7 @@ Sema::VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result,
if (Result)
*Result = EvalResult.Val.getInt();
- return new (Context) ConstantExpr(E);
+ return E;
}
namespace {
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