diff options
Diffstat (limited to 'clang/lib/Sema/SemaChecking.cpp')
| -rw-r--r-- | clang/lib/Sema/SemaChecking.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp index 4e0e76b20dd..78995e3f43b 100644 --- a/clang/lib/Sema/SemaChecking.cpp +++ b/clang/lib/Sema/SemaChecking.cpp @@ -1786,6 +1786,10 @@ ExprResult Sema::SemaBuiltinShuffleVector(CallExpr *TheCall) { diag::err_shufflevector_nonconstant_argument) << TheCall->getArg(i)->getSourceRange()); + // Allow -1 which will be translated to undef in the IR. + if (Result.isSigned() && Result.isAllOnesValue()) + continue; + if (Result.getActiveBits() > 64 || Result.getZExtValue() >= numElements*2) return ExprError(Diag(TheCall->getLocStart(), diag::err_shufflevector_argument_too_large) |
