[clang][bytecode] Fix integral cast edge case#161506
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@llvm/pr-subscribers-clang Author: Timm Baeder (tbaederr) ChangesWe were converting the Full diff: https://github.com/llvm/llvm-project/pull/161506.diff 2 Files Affected:
diff --git a/clang/lib/AST/ByteCode/Compiler.cpp b/clang/lib/AST/ByteCode/Compiler.cpp
index 0b7b6cd64dd97..c71fd22fe9d7e 100644
--- a/clang/lib/AST/ByteCode/Compiler.cpp
+++ b/clang/lib/AST/ByteCode/Compiler.cpp
@@ -540,7 +540,8 @@ bool Compiler<Emitter>::VisitCastExpr(const CastExpr *CE) {
if (const auto *IL = dyn_cast<IntegerLiteral>(SubExpr)) {
if (ToT != PT_IntAP && ToT != PT_IntAPS && FromT != PT_IntAP &&
FromT != PT_IntAPS && !CE->getType()->isEnumeralType())
- return this->emitConst(IL->getValue(), CE);
+ return this->emitConst(APSInt(IL->getValue(), !isSignedType(*FromT)),
+ CE);
if (!this->emitConst(IL->getValue(), SubExpr))
return false;
} else {
@@ -4541,7 +4542,14 @@ bool Compiler<Emitter>::emitConst(T Value, const Expr *E) {
template <class Emitter>
bool Compiler<Emitter>::emitConst(const APSInt &Value, PrimType Ty,
const Expr *E) {
- return this->emitConst(static_cast<const APInt &>(Value), Ty, E);
+ if (Ty == PT_IntAPS)
+ return this->emitConstIntAPS(Value, E);
+ if (Ty == PT_IntAP)
+ return this->emitConstIntAP(Value, E);
+
+ if (Value.isSigned())
+ return this->emitConst(Value.getSExtValue(), Ty, E);
+ return this->emitConst(Value.getZExtValue(), Ty, E);
}
template <class Emitter>
diff --git a/clang/test/AST/ByteCode/literals.cpp b/clang/test/AST/ByteCode/literals.cpp
index 5bc3f7f4c815c..5028ebfa3de30 100644
--- a/clang/test/AST/ByteCode/literals.cpp
+++ b/clang/test/AST/ByteCode/literals.cpp
@@ -28,6 +28,8 @@ static_assert(number != 10, ""); // both-error{{failed}} \
static_assert(__objc_yes, "");
static_assert(!__objc_no, "");
+static_assert((long long)0x00000000FFFF0000 == 4294901760, "");
+
constexpr bool b = number;
static_assert(b, "");
constexpr int one = true;
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/163/builds/27400 Here is the relevant piece of the build log for the reference |
mahesh-attarde
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Oct 3, 2025
We were converting the `ASInt` to as sign-less `APInt` too early and losing the sign information.
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We were converting the
ASIntto as sign-lessAPInttoo early and losing the sign information.