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author | Erik Pilkington <erik.pilkington@gmail.com> | 2019-07-02 18:28:13 +0000 |
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committer | Erik Pilkington <erik.pilkington@gmail.com> | 2019-07-02 18:28:13 +0000 |
commit | 159cd770e3ea0c5cba37006c4dc96b3235670f0d (patch) | |
tree | 0f7c041619d7593e111a77c1f79954b83b6dbf99 /lib/Serialization/ASTReaderStmt.cpp | |
parent | 54b8029400637989d16f8467643c46296e62e1d3 (diff) | |
download | clang-159cd770e3ea0c5cba37006c4dc96b3235670f0d.tar.gz |
[C++2a] Add __builtin_bit_cast, used to implement std::bit_cast
This commit adds a new builtin, __builtin_bit_cast(T, v), which performs a
bit_cast from a value v to a type T. This expression can be evaluated at
compile time under specific circumstances.
The compile time evaluation currently doesn't support bit-fields, but I'm
planning on fixing this in a follow up (some of the logic for figuring this out
is in CodeGen). I'm also planning follow-ups for supporting some more esoteric
types that the constexpr evaluator supports, as well as extending
__builtin_memcpy constexpr evaluation to use the same infrastructure.
rdar://44987528
Differential revision: https://reviews.llvm.org/D62825
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@364954 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Serialization/ASTReaderStmt.cpp')
-rw-r--r-- | lib/Serialization/ASTReaderStmt.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/Serialization/ASTReaderStmt.cpp b/lib/Serialization/ASTReaderStmt.cpp index 82f055c3ec..58103eaf9a 100644 --- a/lib/Serialization/ASTReaderStmt.cpp +++ b/lib/Serialization/ASTReaderStmt.cpp @@ -1510,6 +1510,12 @@ void ASTStmtReader::VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr *E) { E->setRParenLoc(ReadSourceLocation()); } +void ASTStmtReader::VisitBuiltinBitCastExpr(BuiltinBitCastExpr *E) { + VisitExplicitCastExpr(E); + E->KWLoc = ReadSourceLocation(); + E->RParenLoc = ReadSourceLocation(); +} + void ASTStmtReader::VisitUserDefinedLiteral(UserDefinedLiteral *E) { VisitCallExpr(E); E->UDSuffixLoc = ReadSourceLocation(); |