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| author | Craig Topper <craig.topper@gmail.com> | 2013-08-03 17:40:38 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2013-08-03 17:40:38 +0000 |
| commit | 50ad5b7354187308b3cb7319ff387b3409c06af3 (patch) | |
| tree | 98aafd332542f4936896f4214518aa471a475f60 /clang/lib/Sema/SemaChecking.cpp | |
| parent | b176acb6b72e12f301e0ea9c9e8664f5ba6de610 (diff) | |
| download | bcm5719-llvm-50ad5b7354187308b3cb7319ff387b3409c06af3.tar.gz bcm5719-llvm-50ad5b7354187308b3cb7319ff387b3409c06af3.zip | |
Add support for passing -1 to __builtin_shufflevector to signify an undefined element value to match IR capabilities.
llvm-svn: 187694
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) |
