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Don't use -1 as a value of an unsigned 7-bit enumeration; that has undefined

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behavior and violates the !range constraints we put on loads of this enum.
Found by clang -fsanitize=enum.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170653 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Smith 2012-12-20 04:02:58 +00:00
parent e8ce626308
commit fe4ef2c2ae
2 changed files with 2 additions and 2 deletions
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1
include/llvm/DataLayout.h
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@ -39,6 +39,7 @@ class ArrayRef;
/// Enum used to categorize the alignment types stored by LayoutAlignElem /// Enum used to categorize the alignment types stored by LayoutAlignElem
enum AlignTypeEnum { enum AlignTypeEnum {
INVALID_ALIGN = 0, ///< An invalid alignment
INTEGER_ALIGN = 'i', ///< Integer type alignment INTEGER_ALIGN = 'i', ///< Integer type alignment
VECTOR_ALIGN = 'v', ///< Vector type alignment VECTOR_ALIGN = 'v', ///< Vector type alignment
FLOAT_ALIGN = 'f', ///< Floating point type alignment FLOAT_ALIGN = 'f', ///< Floating point type alignment

3
lib/VMCore/DataLayout.cpp
View File

@ -118,8 +118,7 @@ LayoutAlignElem::operator==(const LayoutAlignElem &rhs) const {
} }
const LayoutAlignElem const LayoutAlignElem
DataLayout::InvalidAlignmentElem = DataLayout::InvalidAlignmentElem = LayoutAlignElem::get(INVALID_ALIGN, 0, 0, 0);
LayoutAlignElem::get((AlignTypeEnum) -1, 0, 0, 0);
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// PointerAlignElem, PointerAlign support // PointerAlignElem, PointerAlign support