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[analyzer] Fix crash analyzing _BitInt() in evalIntegralCast #66782

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merged 1 commit into from
Sep 20, 2023
Merged

[analyzer] Fix crash analyzing _BitInt() in evalIntegralCast #66782

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8 changes: 3 additions & 5 deletions clang/lib/StaticAnalyzer/Core/SValBuilder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -598,11 +598,9 @@ SVal SValBuilder::evalIntegralCast(ProgramStateRef state, SVal val,
APSIntType ToType(getContext().getTypeSize(castTy),
castTy->isUnsignedIntegerType());
llvm::APSInt ToTypeMax = ToType.getMaxValue();
NonLoc ToTypeMaxVal =
makeIntVal(ToTypeMax.isUnsigned() ? ToTypeMax.getZExtValue()
: ToTypeMax.getSExtValue(),
castTy)
.castAs<NonLoc>();

NonLoc ToTypeMaxVal = makeIntVal(ToTypeMax);

// Check the range of the symbol being casted against the maximum value of the
// target type.
NonLoc FromVal = val.castAs<NonLoc>();
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13 changes: 13 additions & 0 deletions clang/test/Analysis/bitint-no-crash.c
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Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
// RUN: %clang_analyze_cc1 -analyzer-checker=core \
// RUN: -analyzer-checker=debug.ExprInspection \
// RUN: -triple x86_64-pc-linux-gnu \
// RUN: -verify %s

// Don't crash when using _BitInt(). Pin to the x86_64 triple for now,
// since not all architectures support _BitInt()
// expected-no-diagnostics
_BitInt(256) a;
_BitInt(129) b;
void c() {
b = a;
}