diff options
Diffstat (limited to 'include/llvm/Constants.h')
| -rw-r--r-- | include/llvm/Constants.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index ba0ace3f7a..9ca845ec9d 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -923,7 +923,11 @@ DEFINE_TRANSPARENT_CASTED_OPERAND_ACCESSORS(ConstantExpr, Constant) /// UndefValue - 'undef' values are things that do not have specified contents. /// These are used for a variety of purposes, including global variable /// initializers and operands to instructions. 'undef' values can occur with -/// any type. +/// any first-class type. +/// +/// Undef values aren't exactly constants; if they have multiple uses, they +/// can appear to have different bit patterns at each use. See +/// LangRef.html#undefvalues for details. /// class UndefValue : public Constant { friend struct ConstantCreator<UndefValue, Type, char>; @@ -954,6 +958,7 @@ public: return V->getValueID() == UndefValueVal; } }; + } // End llvm namespace #endif |