diff options
Diffstat (limited to 'clang/lib/Sema/SemaChecking.cpp')
| -rw-r--r-- | clang/lib/Sema/SemaChecking.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp index 07d3648dc9a..b35d591a7f2 100644 --- a/clang/lib/Sema/SemaChecking.cpp +++ b/clang/lib/Sema/SemaChecking.cpp @@ -6063,6 +6063,16 @@ bool Sema::SemaBuiltinAssumeAligned(CallExpr *TheCall) { if (!Result.isPowerOf2()) return Diag(TheCall->getBeginLoc(), diag::err_alignment_not_power_of_two) << Arg->getSourceRange(); + + // FIXME: this should probably use llvm::Value::MaximumAlignment, however + // doing so results in a linking issue in GCC in a couple of assemblies. + // Alignment calculations can wrap around if it's greater than 2**28. + unsigned MaximumAlignment = + Context.getTargetInfo().getTriple().isOSBinFormatCOFF() ? 8192 + : 268435456; + if (Result > MaximumAlignment) + Diag(TheCall->getBeginLoc(), diag::warn_assume_aligned_too_great) + << Arg->getSourceRange() << MaximumAlignment; } if (NumArgs > 2) { |
