Author: Fangrui Song Date: 2022-09-08T13:39:30-07:00 New Revision: 49c289879c7aa9737429f7342c7149a8ba958667
URL: https://github.com/llvm/llvm-project/commit/49c289879c7aa9737429f7342c7149a8ba958667 DIFF: https://github.com/llvm/llvm-project/commit/49c289879c7aa9737429f7342c7149a8ba958667.diff LOG: [AST/Interp] Fix latent unitialized use of memory bug in D64146 Exposed by D132727: clang/test/AST/Interp/arrays.cpp fails with --config=msan Added: Modified: clang/lib/AST/Interp/Descriptor.cpp Removed: ################################################################################ diff --git a/clang/lib/AST/Interp/Descriptor.cpp b/clang/lib/AST/Interp/Descriptor.cpp index 5c1a8a9cf3066..2098ae778a87a 100644 --- a/clang/lib/AST/Interp/Descriptor.cpp +++ b/clang/lib/AST/Interp/Descriptor.cpp @@ -259,9 +259,7 @@ SourceLocation Descriptor::getLocation() const { } InitMap::InitMap(unsigned N) : UninitFields(N) { - for (unsigned I = 0; I < N / PER_FIELD; ++I) { - data()[I] = 0; - } + std::fill_n(data(), (N + PER_FIELD - 1) / PER_FIELD, 0); } InitMap::T *InitMap::data() { _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
