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| author | Douglas Gregor <dgregor@apple.com> | 2010-07-13 23:17:26 +0000 |
|---|---|---|
| committer | Douglas Gregor <dgregor@apple.com> | 2010-07-13 23:17:26 +0000 |
| commit | e39a3894513349908cdb3beba2614e53cb288e6c (patch) | |
| tree | 0b9b218cd7266842d4d036e286c20e4c4f741faf /lib/CodeGen/CGExprScalar.cpp | |
| parent | 99f2680e1fdd36777df05ef8a6d50aac07bd4b50 (diff) | |
Introduce a new cast kind for an "lvalue bitcast", which handles
reinterpret_casts (possibly indirectly via C-style/functional casts)
on values, e.g.,
int i;
reinterpret_cast<short&>(i);
The IR generated for this is essentially the same as for
*reinterpret_cast<short*>(&i).
Fixes PR6437, PR7593, and PR7344.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108294 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CGExprScalar.cpp')
| -rw-r--r-- | lib/CodeGen/CGExprScalar.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp index 1ebc2c571a..ef38209e1e 100644 --- a/lib/CodeGen/CGExprScalar.cpp +++ b/lib/CodeGen/CGExprScalar.cpp @@ -925,6 +925,15 @@ Value *ScalarExprEmitter::EmitCastExpr(CastExpr *CE) { //assert(0 && "Unknown cast kind!"); break; + case CastExpr::CK_LValueBitCast: { + Value *V = EmitLValue(E).getAddress(); + V = Builder.CreateBitCast(V, + ConvertType(CGF.getContext().getPointerType(DestTy))); + // FIXME: Are the qualifiers correct here? + return EmitLoadOfLValue(LValue::MakeAddr(V, CGF.MakeQualifiers(DestTy)), + DestTy); + } + case CastExpr::CK_AnyPointerToObjCPointerCast: case CastExpr::CK_AnyPointerToBlockPointerCast: case CastExpr::CK_BitCast: { |