[llvm-branch-commits] [clang] cb5bdaa - Revert "Revert "Revert "[clang][UBSan] Add implicit conversion check for bitf…"
via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Wed Apr 3 14:28:31 PDT 2024
Author: Vitaly Buka
Date: 2024-04-03T14:28:28-07:00
New Revision: cb5bdaae1e426dd468aa935d61b500a602bc98e5
URL: https://github.com/llvm/llvm-project/commit/cb5bdaae1e426dd468aa935d61b500a602bc98e5
DIFF: https://github.com/llvm/llvm-project/commit/cb5bdaae1e426dd468aa935d61b500a602bc98e5.diff
LOG: Revert "Revert "Revert "[clang][UBSan] Add implicit conversion check for bitf…"
This reverts commit 8a5a1b770413bb62ff27cd8c2aea3d04b3a95bbe.
Added:
Modified:
clang/docs/ReleaseNotes.rst
clang/docs/UndefinedBehaviorSanitizer.rst
clang/include/clang/Basic/Sanitizers.def
clang/lib/CodeGen/CGExpr.cpp
clang/lib/CodeGen/CGExprScalar.cpp
clang/lib/CodeGen/CodeGenFunction.h
clang/test/Driver/fsanitize.c
compiler-rt/lib/ubsan/ubsan_handlers.cpp
compiler-rt/lib/ubsan/ubsan_handlers.h
Removed:
clang/test/CodeGen/ubsan-bitfield-conversion.c
clang/test/CodeGenCXX/ubsan-bitfield-conversion.cpp
################################################################################
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index e4c0e49ed6fc1c..8fc925350849cd 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -198,10 +198,6 @@ Non-comprehensive list of changes in this release
New Compiler Flags
------------------
-- ``-fsanitize=implicit-bitfield-conversion`` checks implicit truncation and
- sign change.
-- ``-fsanitize=implicit-integer-conversion`` a group that replaces the previous
- group ``-fsanitize=implicit-conversion``.
- ``-Wmissing-designated-field-initializers``, grouped under ``-Wmissing-field-initializers``.
This diagnostic can be disabled to make ``-Wmissing-field-initializers`` behave
@@ -215,9 +211,6 @@ Modified Compiler Flags
- Added a new diagnostic flag ``-Wreturn-mismatch`` which is grouped under
``-Wreturn-type``, and moved some of the diagnostics previously controlled by
``-Wreturn-type`` under this new flag. Fixes #GH72116.
-- ``-fsanitize=implicit-conversion`` is now a group for both
- ``-fsanitize=implicit-integer-conversion`` and
- ``-fsanitize=implicit-bitfield-conversion``.
- Added ``-Wcast-function-type-mismatch`` under the ``-Wcast-function-type``
warning group. Moved the diagnostic previously controlled by
diff --git a/clang/docs/UndefinedBehaviorSanitizer.rst b/clang/docs/UndefinedBehaviorSanitizer.rst
index 531d56e313826c..8f58c92bd2a163 100644
--- a/clang/docs/UndefinedBehaviorSanitizer.rst
+++ b/clang/docs/UndefinedBehaviorSanitizer.rst
@@ -148,11 +148,6 @@ Available checks are:
Issues caught by this sanitizer are not undefined behavior,
but are often unintentional.
- ``-fsanitize=integer-divide-by-zero``: Integer division by zero.
- - ``-fsanitize=implicit-bitfield-conversion``: Implicit conversion from
- integer of larger bit width to smaller bitfield, if that results in data
- loss. This includes unsigned/signed truncations and sign changes, similarly
- to how the ``-fsanitize=implicit-integer-conversion`` group works, but
- explicitly for bitfields.
- ``-fsanitize=nonnull-attribute``: Passing null pointer as a function
parameter which is declared to never be null.
- ``-fsanitize=null``: Use of a null pointer or creation of a null
@@ -198,8 +193,8 @@ Available checks are:
signed division overflow (``INT_MIN/-1``). Note that checks are still
added even when ``-fwrapv`` is enabled. This sanitizer does not check for
lossy implicit conversions performed before the computation (see
- ``-fsanitize=implicit-integer-conversion``). Both of these two issues are handled
- by ``-fsanitize=implicit-integer-conversion`` group of checks.
+ ``-fsanitize=implicit-conversion``). Both of these two issues are handled
+ by ``-fsanitize=implicit-conversion`` group of checks.
- ``-fsanitize=unreachable``: If control flow reaches an unreachable
program point.
- ``-fsanitize=unsigned-integer-overflow``: Unsigned integer overflow, where
@@ -207,7 +202,7 @@ Available checks are:
type. Unlike signed integer overflow, this is not undefined behavior, but
it is often unintentional. This sanitizer does not check for lossy implicit
conversions performed before such a computation
- (see ``-fsanitize=implicit-integer-conversion``).
+ (see ``-fsanitize=implicit-conversion``).
- ``-fsanitize=vla-bound``: A variable-length array whose bound
does not evaluate to a positive value.
- ``-fsanitize=vptr``: Use of an object whose vptr indicates that it is of
@@ -229,15 +224,11 @@ You can also use the following check groups:
- ``-fsanitize=implicit-integer-arithmetic-value-change``: Catches implicit
conversions that change the arithmetic value of the integer. Enables
``implicit-signed-integer-truncation`` and ``implicit-integer-sign-change``.
- - ``-fsanitize=implicit-integer-conversion``: Checks for suspicious
- behavior of implicit integer conversions. Enables
+ - ``-fsanitize=implicit-conversion``: Checks for suspicious
+ behavior of implicit conversions. Enables
``implicit-unsigned-integer-truncation``,
``implicit-signed-integer-truncation``, and
``implicit-integer-sign-change``.
- - ``-fsanitize=implicit-conversion``: Checks for suspicious
- behavior of implicit conversions. Enables
- ``implicit-integer-conversion``, and
- ``implicit-bitfield-conversion``.
- ``-fsanitize=integer``: Checks for undefined or suspicious integer
behavior (e.g. unsigned integer overflow).
Enables ``signed-integer-overflow``, ``unsigned-integer-overflow``,
diff --git a/clang/include/clang/Basic/Sanitizers.def b/clang/include/clang/Basic/Sanitizers.def
index b228ffd07ee745..c2137e3f61f645 100644
--- a/clang/include/clang/Basic/Sanitizers.def
+++ b/clang/include/clang/Basic/Sanitizers.def
@@ -163,24 +163,24 @@ SANITIZER_GROUP("implicit-integer-arithmetic-value-change",
ImplicitIntegerArithmeticValueChange,
ImplicitIntegerSignChange | ImplicitSignedIntegerTruncation)
-SANITIZER_GROUP("implicit-integer-conversion", ImplicitIntegerConversion,
- ImplicitIntegerArithmeticValueChange |
- ImplicitUnsignedIntegerTruncation)
+SANITIZER("objc-cast", ObjCCast)
-// Implicit bitfield sanitizers
-SANITIZER("implicit-bitfield-conversion", ImplicitBitfieldConversion)
+// FIXME:
+//SANITIZER_GROUP("implicit-integer-conversion", ImplicitIntegerConversion,
+// ImplicitIntegerArithmeticValueChange |
+// ImplicitUnsignedIntegerTruncation)
+//SANITIZER_GROUP("implicit-conversion", ImplicitConversion,
+// ImplicitIntegerConversion)
SANITIZER_GROUP("implicit-conversion", ImplicitConversion,
- ImplicitIntegerConversion |
- ImplicitBitfieldConversion)
+ ImplicitIntegerArithmeticValueChange |
+ ImplicitUnsignedIntegerTruncation)
SANITIZER_GROUP("integer", Integer,
- ImplicitIntegerConversion | IntegerDivideByZero | Shift |
+ ImplicitConversion | IntegerDivideByZero | Shift |
SignedIntegerOverflow | UnsignedIntegerOverflow |
UnsignedShiftBase)
-SANITIZER("objc-cast", ObjCCast)
-
SANITIZER("local-bounds", LocalBounds)
SANITIZER_GROUP("bounds", Bounds, ArrayBounds | LocalBounds)
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
index 0c7f48fe00603d..54432353e7420d 100644
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -5580,44 +5580,11 @@ LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) {
break;
}
- // TODO: Can we de-duplicate this code with the corresponding code in
- // CGExprScalar, similar to the way EmitCompoundAssignmentLValue works?
- RValue RV;
- llvm::Value *Previous = nullptr;
- QualType SrcType = E->getRHS()->getType();
- // Check if LHS is a bitfield, if RHS contains an implicit cast expression
- // we want to extract that value and potentially (if the bitfield sanitizer
- // is enabled) use it to check for an implicit conversion.
- if (E->getLHS()->refersToBitField()) {
- llvm::Value *RHS =
- EmitWithOriginalRHSBitfieldAssignment(E, Previous, &SrcType);
- RV = RValue::get(RHS);
- } else
- RV = EmitAnyExpr(E->getRHS());
-
+ RValue RV = EmitAnyExpr(E->getRHS());
LValue LV = EmitCheckedLValue(E->getLHS(), TCK_Store);
-
if (RV.isScalar())
EmitNullabilityCheck(LV, RV.getScalarVal(), E->getExprLoc());
-
- if (LV.isBitField()) {
- llvm::Value *Result = nullptr;
- // If bitfield sanitizers are enabled we want to use the result
- // to check whether a truncation or sign change has occurred.
- if (SanOpts.has(SanitizerKind::ImplicitBitfieldConversion))
- EmitStoreThroughBitfieldLValue(RV, LV, &Result);
- else
- EmitStoreThroughBitfieldLValue(RV, LV);
-
- // If the expression contained an implicit conversion, make sure
- // to use the value before the scalar conversion.
- llvm::Value *Src = Previous ? Previous : RV.getScalarVal();
- QualType DstType = E->getLHS()->getType();
- EmitBitfieldConversionCheck(Src, SrcType, Result, DstType,
- LV.getBitFieldInfo(), E->getExprLoc());
- } else
- EmitStoreThroughLValue(RV, LV);
-
+ EmitStoreThroughLValue(RV, LV);
if (getLangOpts().OpenMP)
CGM.getOpenMPRuntime().checkAndEmitLastprivateConditional(*this,
E->getLHS());
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index a4ab8a11b867fa..397b4977acc3e9 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -15,7 +15,6 @@
#include "CGDebugInfo.h"
#include "CGObjCRuntime.h"
#include "CGOpenMPRuntime.h"
-#include "CGRecordLayout.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "ConstantEmitter.h"
@@ -309,7 +308,6 @@ class ScalarExprEmitter
llvm::Type *DstTy, SourceLocation Loc);
/// Known implicit conversion check kinds.
- /// This is used for bitfield conversion checks as well.
/// Keep in sync with the enum of the same name in ubsan_handlers.h
enum ImplicitConversionCheckKind : unsigned char {
ICCK_IntegerTruncation = 0, // Legacy, was only used by clang 7.
@@ -1105,21 +1103,6 @@ void ScalarExprEmitter::EmitIntegerTruncationCheck(Value *Src, QualType SrcType,
{Src, Dst});
}
-static llvm::Value *EmitIsNegativeTestHelper(Value *V, QualType VType,
- const char *Name,
- CGBuilderTy &Builder) {
- bool VSigned = VType->isSignedIntegerOrEnumerationType();
- llvm::Type *VTy = V->getType();
- if (!VSigned) {
- // If the value is unsigned, then it is never negative.
- return llvm::ConstantInt::getFalse(VTy->getContext());
- }
- llvm::Constant *Zero = llvm::ConstantInt::get(VTy, 0);
- return Builder.CreateICmp(llvm::ICmpInst::ICMP_SLT, V, Zero,
- llvm::Twine(Name) + "." + V->getName() +
- ".negativitycheck");
-}
-
// Should be called within CodeGenFunction::SanitizerScope RAII scope.
// Returns 'i1 false' when the conversion Src -> Dst changed the sign.
static std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
@@ -1144,12 +1127,30 @@ EmitIntegerSignChangeCheckHelper(Value *Src, QualType SrcType, Value *Dst,
assert(((SrcBits != DstBits) || (SrcSigned != DstSigned)) &&
"either the widths should be
diff erent, or the signednesses.");
+ // NOTE: zero value is considered to be non-negative.
+ auto EmitIsNegativeTest = [&Builder](Value *V, QualType VType,
+ const char *Name) -> Value * {
+ // Is this value a signed type?
+ bool VSigned = VType->isSignedIntegerOrEnumerationType();
+ llvm::Type *VTy = V->getType();
+ if (!VSigned) {
+ // If the value is unsigned, then it is never negative.
+ // FIXME: can we encounter non-scalar VTy here?
+ return llvm::ConstantInt::getFalse(VTy->getContext());
+ }
+ // Get the zero of the same type with which we will be comparing.
+ llvm::Constant *Zero = llvm::ConstantInt::get(VTy, 0);
+ // %V.isnegative = icmp slt %V, 0
+ // I.e is %V *strictly* less than zero, does it have negative value?
+ return Builder.CreateICmp(llvm::ICmpInst::ICMP_SLT, V, Zero,
+ llvm::Twine(Name) + "." + V->getName() +
+ ".negativitycheck");
+ };
+
// 1. Was the old Value negative?
- llvm::Value *SrcIsNegative =
- EmitIsNegativeTestHelper(Src, SrcType, "src", Builder);
+ llvm::Value *SrcIsNegative = EmitIsNegativeTest(Src, SrcType, "src");
// 2. Is the new Value negative?
- llvm::Value *DstIsNegative =
- EmitIsNegativeTestHelper(Dst, DstType, "dst", Builder);
+ llvm::Value *DstIsNegative = EmitIsNegativeTest(Dst, DstType, "dst");
// 3. Now, was the 'negativity status' preserved during the conversion?
// NOTE: conversion from negative to zero is considered to change the sign.
// (We want to get 'false' when the conversion changed the sign)
@@ -1244,136 +1245,6 @@ void ScalarExprEmitter::EmitIntegerSignChangeCheck(Value *Src, QualType SrcType,
{Src, Dst});
}
-// Should be called within CodeGenFunction::SanitizerScope RAII scope.
-// Returns 'i1 false' when the truncation Src -> Dst was lossy.
-static std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
- std::pair<llvm::Value *, SanitizerMask>>
-EmitBitfieldTruncationCheckHelper(Value *Src, QualType SrcType, Value *Dst,
- QualType DstType, CGBuilderTy &Builder) {
- bool SrcSigned = SrcType->isSignedIntegerOrEnumerationType();
- bool DstSigned = DstType->isSignedIntegerOrEnumerationType();
-
- ScalarExprEmitter::ImplicitConversionCheckKind Kind;
- if (!SrcSigned && !DstSigned)
- Kind = ScalarExprEmitter::ICCK_UnsignedIntegerTruncation;
- else
- Kind = ScalarExprEmitter::ICCK_SignedIntegerTruncation;
-
- llvm::Value *Check = nullptr;
- // 1. Extend the truncated value back to the same width as the Src.
- Check = Builder.CreateIntCast(Dst, Src->getType(), DstSigned, "bf.anyext");
- // 2. Equality-compare with the original source value
- Check = Builder.CreateICmpEQ(Check, Src, "bf.truncheck");
- // If the comparison result is 'i1 false', then the truncation was lossy.
-
- return std::make_pair(
- Kind, std::make_pair(Check, SanitizerKind::ImplicitBitfieldConversion));
-}
-
-// Should be called within CodeGenFunction::SanitizerScope RAII scope.
-// Returns 'i1 false' when the conversion Src -> Dst changed the sign.
-static std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
- std::pair<llvm::Value *, SanitizerMask>>
-EmitBitfieldSignChangeCheckHelper(Value *Src, QualType SrcType, Value *Dst,
- QualType DstType, CGBuilderTy &Builder) {
- // 1. Was the old Value negative?
- llvm::Value *SrcIsNegative =
- EmitIsNegativeTestHelper(Src, SrcType, "bf.src", Builder);
- // 2. Is the new Value negative?
- llvm::Value *DstIsNegative =
- EmitIsNegativeTestHelper(Dst, DstType, "bf.dst", Builder);
- // 3. Now, was the 'negativity status' preserved during the conversion?
- // NOTE: conversion from negative to zero is considered to change the sign.
- // (We want to get 'false' when the conversion changed the sign)
- // So we should just equality-compare the negativity statuses.
- llvm::Value *Check = nullptr;
- Check =
- Builder.CreateICmpEQ(SrcIsNegative, DstIsNegative, "bf.signchangecheck");
- // If the comparison result is 'false', then the conversion changed the sign.
- return std::make_pair(
- ScalarExprEmitter::ICCK_IntegerSignChange,
- std::make_pair(Check, SanitizerKind::ImplicitBitfieldConversion));
-}
-
-void CodeGenFunction::EmitBitfieldConversionCheck(Value *Src, QualType SrcType,
- Value *Dst, QualType DstType,
- const CGBitFieldInfo &Info,
- SourceLocation Loc) {
-
- if (!SanOpts.has(SanitizerKind::ImplicitBitfieldConversion))
- return;
-
- // We only care about int->int conversions here.
- // We ignore conversions to/from pointer and/or bool.
- if (!PromotionIsPotentiallyEligibleForImplicitIntegerConversionCheck(SrcType,
- DstType))
- return;
-
- if (DstType->isBooleanType() || SrcType->isBooleanType())
- return;
-
- // This should be truncation of integral types.
- assert(isa<llvm::IntegerType>(Src->getType()) &&
- isa<llvm::IntegerType>(Dst->getType()) && "non-integer llvm type");
-
- // TODO: Calculate src width to avoid emitting code
- // for unecessary cases.
- unsigned SrcBits = ConvertType(SrcType)->getScalarSizeInBits();
- unsigned DstBits = Info.Size;
-
- bool SrcSigned = SrcType->isSignedIntegerOrEnumerationType();
- bool DstSigned = DstType->isSignedIntegerOrEnumerationType();
-
- CodeGenFunction::SanitizerScope SanScope(this);
-
- std::pair<ScalarExprEmitter::ImplicitConversionCheckKind,
- std::pair<llvm::Value *, SanitizerMask>>
- Check;
-
- // Truncation
- bool EmitTruncation = DstBits < SrcBits;
- // If Dst is signed and Src unsigned, we want to be more specific
- // about the CheckKind we emit, in this case we want to emit
- // ICCK_SignedIntegerTruncationOrSignChange.
- bool EmitTruncationFromUnsignedToSigned =
- EmitTruncation && DstSigned && !SrcSigned;
- // Sign change
- bool SameTypeSameSize = SrcSigned == DstSigned && SrcBits == DstBits;
- bool BothUnsigned = !SrcSigned && !DstSigned;
- bool LargerSigned = (DstBits > SrcBits) && DstSigned;
- // We can avoid emitting sign change checks in some obvious cases
- // 1. If Src and Dst have the same signedness and size
- // 2. If both are unsigned sign check is unecessary!
- // 3. If Dst is signed and bigger than Src, either
- // sign-extension or zero-extension will make sure
- // the sign remains.
- bool EmitSignChange = !SameTypeSameSize && !BothUnsigned && !LargerSigned;
-
- if (EmitTruncation)
- Check =
- EmitBitfieldTruncationCheckHelper(Src, SrcType, Dst, DstType, Builder);
- else if (EmitSignChange) {
- assert(((SrcBits != DstBits) || (SrcSigned != DstSigned)) &&
- "either the widths should be
diff erent, or the signednesses.");
- Check =
- EmitBitfieldSignChangeCheckHelper(Src, SrcType, Dst, DstType, Builder);
- } else
- return;
-
- ScalarExprEmitter::ImplicitConversionCheckKind CheckKind = Check.first;
- if (EmitTruncationFromUnsignedToSigned)
- CheckKind = ScalarExprEmitter::ICCK_SignedIntegerTruncationOrSignChange;
-
- llvm::Constant *StaticArgs[] = {
- EmitCheckSourceLocation(Loc), EmitCheckTypeDescriptor(SrcType),
- EmitCheckTypeDescriptor(DstType),
- llvm::ConstantInt::get(Builder.getInt8Ty(), CheckKind),
- llvm::ConstantInt::get(Builder.getInt32Ty(), Info.Size)};
-
- EmitCheck(Check.second, SanitizerHandler::ImplicitConversion, StaticArgs,
- {Src, Dst});
-}
-
Value *ScalarExprEmitter::EmitScalarCast(Value *Src, QualType SrcType,
QualType DstType, llvm::Type *SrcTy,
llvm::Type *DstTy,
@@ -2749,8 +2620,6 @@ ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
llvm::PHINode *atomicPHI = nullptr;
llvm::Value *value;
llvm::Value *input;
- llvm::Value *Previous = nullptr;
- QualType SrcType = E->getType();
int amount = (isInc ? 1 : -1);
bool isSubtraction = !isInc;
@@ -2839,8 +2708,7 @@ ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
"base or promoted) will be signed, or the bitwidths will match.");
}
if (CGF.SanOpts.hasOneOf(
- SanitizerKind::ImplicitIntegerArithmeticValueChange |
- SanitizerKind::ImplicitBitfieldConversion) &&
+ SanitizerKind::ImplicitIntegerArithmeticValueChange) &&
canPerformLossyDemotionCheck) {
// While `x += 1` (for `x` with width less than int) is modeled as
// promotion+arithmetics+demotion, and we can catch lossy demotion with
@@ -2851,26 +2719,13 @@ ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
// the increment/decrement in the wider type, and finally
// perform the demotion. This will catch lossy demotions.
- // We have a special case for bitfields defined using all the bits of the
- // type. In this case we need to do the same trick as for the integer
- // sanitizer checks, i.e., promotion -> increment/decrement -> demotion.
-
value = EmitScalarConversion(value, type, promotedType, E->getExprLoc());
Value *amt = llvm::ConstantInt::get(value->getType(), amount, true);
value = Builder.CreateAdd(value, amt, isInc ? "inc" : "dec");
// Do pass non-default ScalarConversionOpts so that sanitizer check is
- // emitted if LV is not a bitfield, otherwise the bitfield sanitizer
- // checks will take care of the conversion.
- ScalarConversionOpts Opts;
- if (!LV.isBitField())
- Opts = ScalarConversionOpts(CGF.SanOpts);
- else if (CGF.SanOpts.has(SanitizerKind::ImplicitBitfieldConversion)) {
- Previous = value;
- SrcType = promotedType;
- }
-
+ // emitted.
value = EmitScalarConversion(value, promotedType, type, E->getExprLoc(),
- Opts);
+ ScalarConversionOpts(CGF.SanOpts));
// Note that signed integer inc/dec with width less than int can't
// overflow because of promotion rules; we're just eliding a few steps
@@ -3055,12 +2910,9 @@ ScalarExprEmitter::EmitScalarPrePostIncDec(const UnaryOperator *E, LValue LV,
}
// Store the updated result through the lvalue.
- if (LV.isBitField()) {
- Value *Src = Previous ? Previous : value;
+ if (LV.isBitField())
CGF.EmitStoreThroughBitfieldLValue(RValue::get(value), LV, &value);
- CGF.EmitBitfieldConversionCheck(Src, SrcType, value, E->getType(),
- LV.getBitFieldInfo(), E->getExprLoc());
- } else
+ else
CGF.EmitStoreThroughLValue(RValue::get(value), LV);
// If this is a postinc, return the value read from memory, otherwise use the
@@ -3565,15 +3417,8 @@ LValue ScalarExprEmitter::EmitCompoundAssignLValue(
// Convert the result back to the LHS type,
// potentially with Implicit Conversion sanitizer check.
- // If LHSLV is a bitfield, use default ScalarConversionOpts
- // to avoid emit any implicit integer checks.
- Value *Previous = nullptr;
- if (LHSLV.isBitField()) {
- Previous = Result;
- Result = EmitScalarConversion(Result, PromotionTypeCR, LHSTy, Loc);
- } else
- Result = EmitScalarConversion(Result, PromotionTypeCR, LHSTy, Loc,
- ScalarConversionOpts(CGF.SanOpts));
+ Result = EmitScalarConversion(Result, PromotionTypeCR, LHSTy, Loc,
+ ScalarConversionOpts(CGF.SanOpts));
if (atomicPHI) {
llvm::BasicBlock *curBlock = Builder.GetInsertBlock();
@@ -3592,14 +3437,9 @@ LValue ScalarExprEmitter::EmitCompoundAssignLValue(
// specially because the result is altered by the store, i.e., [C99 6.5.16p1]
// 'An assignment expression has the value of the left operand after the
// assignment...'.
- if (LHSLV.isBitField()) {
- Value *Src = Previous ? Previous : Result;
- QualType SrcType = E->getRHS()->getType();
- QualType DstType = E->getLHS()->getType();
+ if (LHSLV.isBitField())
CGF.EmitStoreThroughBitfieldLValue(RValue::get(Result), LHSLV, &Result);
- CGF.EmitBitfieldConversionCheck(Src, SrcType, Result, DstType,
- LHSLV.getBitFieldInfo(), E->getExprLoc());
- } else
+ else
CGF.EmitStoreThroughLValue(RValue::get(Result), LHSLV);
if (CGF.getLangOpts().OpenMP)
@@ -4711,24 +4551,6 @@ Value *ScalarExprEmitter::EmitCompare(const BinaryOperator *E,
E->getExprLoc());
}
-llvm::Value *CodeGenFunction::EmitWithOriginalRHSBitfieldAssignment(
- const BinaryOperator *E, Value *Previous, QualType *SrcType) {
- // In case we have the integer or bitfield sanitizer checks enabled
- // we want to get the expression before scalar conversion.
- if (auto *ICE = dyn_cast<ImplicitCastExpr>(E->getRHS())) {
- CastKind Kind = ICE->getCastKind();
- if (Kind == CK_IntegralCast) {
- *SrcType = ICE->getSubExpr()->getType();
- Previous = EmitScalarExpr(ICE->getSubExpr());
- // Pass default ScalarConversionOpts to avoid emitting
- // integer sanitizer checks as E refers to bitfield.
- return EmitScalarConversion(Previous, *SrcType, ICE->getType(),
- ICE->getExprLoc());
- }
- }
- return EmitScalarExpr(E->getRHS());
-}
-
Value *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) {
bool Ignore = TestAndClearIgnoreResultAssign();
@@ -4757,16 +4579,7 @@ Value *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) {
case Qualifiers::OCL_None:
// __block variables need to have the rhs evaluated first, plus
// this should improve codegen just a little.
- Value *Previous = nullptr;
- QualType SrcType = E->getRHS()->getType();
- // Check if LHS is a bitfield, if RHS contains an implicit cast expression
- // we want to extract that value and potentially (if the bitfield sanitizer
- // is enabled) use it to check for an implicit conversion.
- if (E->getLHS()->refersToBitField())
- RHS = CGF.EmitWithOriginalRHSBitfieldAssignment(E, Previous, &SrcType);
- else
- RHS = Visit(E->getRHS());
-
+ RHS = Visit(E->getRHS());
LHS = EmitCheckedLValue(E->getLHS(), CodeGenFunction::TCK_Store);
// Store the value into the LHS. Bit-fields are handled specially
@@ -4775,12 +4588,6 @@ Value *ScalarExprEmitter::VisitBinAssign(const BinaryOperator *E) {
// the assignment...'.
if (LHS.isBitField()) {
CGF.EmitStoreThroughBitfieldLValue(RValue::get(RHS), LHS, &RHS);
- // If the expression contained an implicit conversion, make sure
- // to use the value before the scalar conversion.
- Value *Src = Previous ? Previous : RHS;
- QualType DstType = E->getLHS()->getType();
- CGF.EmitBitfieldConversionCheck(Src, SrcType, RHS, DstType,
- LHS.getBitFieldInfo(), E->getExprLoc());
} else {
CGF.EmitNullabilityCheck(LHS, RHS, E->getExprLoc());
CGF.EmitStoreThroughLValue(RValue::get(RHS), LHS);
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index 99a7f518730e87..e2a7e28c8211ea 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -2786,21 +2786,6 @@ class CodeGenFunction : public CodeGenTypeCache {
/// expression and compare the result against zero, returning an Int1Ty value.
llvm::Value *EvaluateExprAsBool(const Expr *E);
- /// Retrieve the implicit cast expression of the rhs in a binary operator
- /// expression by passing pointers to Value and QualType
- /// This is used for implicit bitfield conversion checks, which
- /// must compare with the value before potential truncation.
- llvm::Value *EmitWithOriginalRHSBitfieldAssignment(const BinaryOperator *E,
- llvm::Value *Previous,
- QualType *SrcType);
-
- /// Emit a check that an [implicit] conversion of a bitfield. It is not UB,
- /// so we use the value after conversion.
- void EmitBitfieldConversionCheck(llvm::Value *Src, QualType SrcType,
- llvm::Value *Dst, QualType DstType,
- const CGBitFieldInfo &Info,
- SourceLocation Loc);
-
/// EmitIgnoredExpr - Emit an expression in a context which ignores the result.
void EmitIgnoredExpr(const Expr *E);
diff --git a/clang/test/CodeGen/ubsan-bitfield-conversion.c b/clang/test/CodeGen/ubsan-bitfield-conversion.c
deleted file mode 100644
index ea9bdd7da6bc26..00000000000000
--- a/clang/test/CodeGen/ubsan-bitfield-conversion.c
+++ /dev/null
@@ -1,61 +0,0 @@
-// RUN: %clang -fsanitize=implicit-bitfield-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,CHECK-BITFIELD-CONVERSION
-// RUN: %clang -fsanitize=implicit-integer-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK
-// RUN: %clang -fsanitize=implicit-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,CHECK-BITFIELD-CONVERSION
-
-typedef struct _xx {
- int x1:3;
- char x2:2;
-} xx, *pxx;
-
-xx vxx;
-
-// CHECK-LABEL: define{{.*}} void @foo1
-void foo1(int x) {
- vxx.x1 = x;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
-
-// CHECK-LABEL: define{{.*}} void @foo2
-void foo2(int x) {
- vxx.x2 = x;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 6
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 6
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
-
-// CHECK-LABEL: define{{.*}} void @foo3
-void foo3() {
- vxx.x1++;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
-
-// CHECK-LABEL: define{{.*}} void @foo4
-void foo4(int x) {
- vxx.x1 += x;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
\ No newline at end of file
diff --git a/clang/test/CodeGenCXX/ubsan-bitfield-conversion.cpp b/clang/test/CodeGenCXX/ubsan-bitfield-conversion.cpp
deleted file mode 100644
index 92f6e247c5f5ba..00000000000000
--- a/clang/test/CodeGenCXX/ubsan-bitfield-conversion.cpp
+++ /dev/null
@@ -1,94 +0,0 @@
-// RUN: %clang -x c++ -fsanitize=implicit-bitfield-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,CHECK-BITFIELD-CONVERSION
-// RUN: %clang -x c++ -fsanitize=implicit-integer-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK
-// RUN: %clang -x c++ -fsanitize=implicit-conversion -target x86_64-linux -S -emit-llvm -o - %s | FileCheck %s --check-prefixes=CHECK,CHECK-BITFIELD-CONVERSION
-
-struct S {
- int a:3;
- char b:2;
-};
-
-class C : public S {
- public:
- short c:3;
-};
-
-S s;
-C c;
-
-// CHECK-LABEL: define{{.*}} void @{{.*foo1.*}}
-void foo1(int x) {
- s.a = x;
- // CHECK: store i8 %{{.*}}
- // CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- c.a = x;
- // CHECK: store i8 %{{.*}}
- // CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
-
-// CHECK-LABEL: define{{.*}} void @{{.*foo2.*}}
-void foo2(int x) {
- s.b = x;
- // CHECK: store i8 %{{.*}}
- // CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 6
- // CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 6
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- c.b = x;
- // CHECK: store i8 %{{.*}}
- // CHECK-BITFIELD-CONVERSION: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 6
- // CHECK-BITFIELD-CONVERSION-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 6
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
-
-// CHECK-LABEL: define{{.*}} void @{{.*foo3.*}}
-void foo3() {
- s.a++;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- c.a++;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
-
-// CHECK-LABEL: define{{.*}} void @{{.*foo4.*}}
-void foo4(int x) {
- s.a += x;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- c.a += x;
- // CHECK: store i8 %{{.*}}
- // CHECK-NEXT: [[BFRESULTSHL:%.*]] = shl i8 {{.*}}, 5
- // CHECK-NEXT: [[BFRESULTASHR:%.*]] = ashr i8 [[BFRESULTSHL]], 5
- // CHECK-NEXT: [[BFRESULTCAST:%.*]] = sext i8 [[BFRESULTASHR]] to i32
- // CHECK-BITFIELD-CONVERSION: call void @__ubsan_handle_implicit_conversion
- // CHECK-BITFIELD-CONVERSION-NEXT: br label %[[CONT:.*]], !nosanitize !6
- // CHECK-BITFIELD-CONVERSION: [[CONT]]:
- // CHECK-NEXT: ret void
-}
\ No newline at end of file
diff --git a/clang/test/Driver/fsanitize.c b/clang/test/Driver/fsanitize.c
index 571f79a6e7f70d..1671825042c323 100644
--- a/clang/test/Driver/fsanitize.c
+++ b/clang/test/Driver/fsanitize.c
@@ -35,20 +35,20 @@
// RUN: %clang --target=%itanium_abi_triple -fsanitize=integer %s -### 2>&1 | FileCheck %s --check-prefix=CHECK-INTEGER -implicit-check-not="-fsanitize-address-use-after-scope"
// CHECK-INTEGER: "-fsanitize={{((signed-integer-overflow|unsigned-integer-overflow|integer-divide-by-zero|shift-base|shift-exponent|implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change|unsigned-shift-base),?){9}"}}
-// RUN: %clang -fsanitize=implicit-integer-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-integer-conversion,CHECK-implicit-integer-conversion-RECOVER
-// RUN: %clang -fsanitize=implicit-integer-conversion -fsanitize-recover=implicit-integer-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-integer-conversion,CHECK-implicit-integer-conversion-RECOVER
-// RUN: %clang -fsanitize=implicit-integer-conversion -fno-sanitize-recover=implicit-integer-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-integer-conversion,CHECK-implicit-integer-conversion-NORECOVER
-// RUN: %clang -fsanitize=implicit-integer-conversion -fsanitize-trap=implicit-integer-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-integer-conversion,CHECK-implicit-integer-conversion-TRAP
-// CHECK-implicit-integer-conversion: "-fsanitize={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-RECOVER: "-fsanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-RECOVER-NOT: "-fno-sanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-RECOVER-NOT: "-fsanitize-trap={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-NORECOVER-NOT: "-fno-sanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}} // ???
-// CHECK-implicit-integer-conversion-NORECOVER-NOT: "-fsanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-NORECOVER-NOT: "-fsanitize-trap={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-TRAP: "-fsanitize-trap={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-TRAP-NOT: "-fsanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
-// CHECK-implicit-integer-conversion-TRAP-NOT: "-fno-sanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// RUN: %clang -fsanitize=implicit-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-conversion,CHECK-implicit-conversion-RECOVER
+// RUN: %clang -fsanitize=implicit-conversion -fsanitize-recover=implicit-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-conversion,CHECK-implicit-conversion-RECOVER
+// RUN: %clang -fsanitize=implicit-conversion -fno-sanitize-recover=implicit-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-conversion,CHECK-implicit-conversion-NORECOVER
+// RUN: %clang -fsanitize=implicit-conversion -fsanitize-trap=implicit-conversion %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-conversion,CHECK-implicit-conversion-TRAP
+// CHECK-implicit-conversion: "-fsanitize={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-RECOVER: "-fsanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-RECOVER-NOT: "-fno-sanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-RECOVER-NOT: "-fsanitize-trap={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-NORECOVER-NOT: "-fno-sanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}} // ???
+// CHECK-implicit-conversion-NORECOVER-NOT: "-fsanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-NORECOVER-NOT: "-fsanitize-trap={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-TRAP: "-fsanitize-trap={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-TRAP-NOT: "-fsanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
+// CHECK-implicit-conversion-TRAP-NOT: "-fno-sanitize-recover={{((implicit-unsigned-integer-truncation|implicit-signed-integer-truncation|implicit-integer-sign-change),?){3}"}}
// RUN: %clang -fsanitize=implicit-integer-arithmetic-value-change %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-integer-arithmetic-value-change,CHECK-implicit-integer-arithmetic-value-change-RECOVER
// RUN: %clang -fsanitize=implicit-integer-arithmetic-value-change -fsanitize-recover=implicit-integer-arithmetic-value-change %s -### 2>&1 | FileCheck %s --check-prefixes=CHECK-implicit-integer-arithmetic-value-change,CHECK-implicit-integer-arithmetic-value-change-RECOVER
diff --git a/compiler-rt/lib/ubsan/ubsan_handlers.cpp b/compiler-rt/lib/ubsan/ubsan_handlers.cpp
index 27d01653f088da..0f16507d5d88f1 100644
--- a/compiler-rt/lib/ubsan/ubsan_handlers.cpp
+++ b/compiler-rt/lib/ubsan/ubsan_handlers.cpp
@@ -555,11 +555,13 @@ static void handleImplicitConversion(ImplicitConversionData *Data,
ReportOptions Opts, ValueHandle Src,
ValueHandle Dst) {
SourceLocation Loc = Data->Loc.acquire();
+ ErrorType ET = ErrorType::GenericUB;
+
const TypeDescriptor &SrcTy = Data->FromType;
const TypeDescriptor &DstTy = Data->ToType;
+
bool SrcSigned = SrcTy.isSignedIntegerTy();
bool DstSigned = DstTy.isSignedIntegerTy();
- ErrorType ET = ErrorType::GenericUB;
switch (Data->Kind) {
case ICCK_IntegerTruncation: { // Legacy, no longer used.
@@ -592,23 +594,14 @@ static void handleImplicitConversion(ImplicitConversionData *Data,
ScopedReport R(Opts, Loc, ET);
- // In the case we have a bitfield, we want to explicitly say so in the
- // error message.
// FIXME: is it possible to dump the values as hex with fixed width?
- if (Data->BitfieldBits)
- Diag(Loc, DL_Error, ET,
- "implicit conversion from type %0 of value %1 (%2-bit, %3signed) to "
- "type %4 changed the value to %5 (%6-bit bitfield, %7signed)")
- << SrcTy << Value(SrcTy, Src) << SrcTy.getIntegerBitWidth()
- << (SrcSigned ? "" : "un") << DstTy << Value(DstTy, Dst)
- << Data->BitfieldBits << (DstSigned ? "" : "un");
- else
- Diag(Loc, DL_Error, ET,
- "implicit conversion from type %0 of value %1 (%2-bit, %3signed) to "
- "type %4 changed the value to %5 (%6-bit, %7signed)")
- << SrcTy << Value(SrcTy, Src) << SrcTy.getIntegerBitWidth()
- << (SrcSigned ? "" : "un") << DstTy << Value(DstTy, Dst)
- << DstTy.getIntegerBitWidth() << (DstSigned ? "" : "un");
+
+ Diag(Loc, DL_Error, ET,
+ "implicit conversion from type %0 of value %1 (%2-bit, %3signed) to "
+ "type %4 changed the value to %5 (%6-bit, %7signed)")
+ << SrcTy << Value(SrcTy, Src) << SrcTy.getIntegerBitWidth()
+ << (SrcSigned ? "" : "un") << DstTy << Value(DstTy, Dst)
+ << DstTy.getIntegerBitWidth() << (DstSigned ? "" : "un");
}
void __ubsan::__ubsan_handle_implicit_conversion(ImplicitConversionData *Data,
diff --git a/compiler-rt/lib/ubsan/ubsan_handlers.h b/compiler-rt/lib/ubsan/ubsan_handlers.h
index bae661a56833dd..3bd5046de3d7d1 100644
--- a/compiler-rt/lib/ubsan/ubsan_handlers.h
+++ b/compiler-rt/lib/ubsan/ubsan_handlers.h
@@ -147,7 +147,6 @@ struct ImplicitConversionData {
const TypeDescriptor &FromType;
const TypeDescriptor &ToType;
/* ImplicitConversionCheckKind */ unsigned char Kind;
- unsigned int BitfieldBits;
};
/// \brief Implict conversion that changed the value.
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