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| author | Mike Stump <mrs@apple.com> | 2009-12-14 23:53:10 +0000 |
|---|---|---|
| committer | Mike Stump <mrs@apple.com> | 2009-12-14 23:53:10 +0000 |
| commit | 53664ca7bee0cb1e203c60969fde37191fee1620 (patch) | |
| tree | e9142136b8024bf6e93d61b38f18639f40cc2155 | |
| parent | e976ffe18ee60b81641423f42ff6feec2f5e3cb7 (diff) | |
Add documentation for recently added code. WIP.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91367 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/UsersManual.html | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/docs/UsersManual.html b/docs/UsersManual.html index cfaa071083..b5aa6a8dcd 100644 --- a/docs/UsersManual.html +++ b/docs/UsersManual.html @@ -40,6 +40,7 @@ td { <li><a href="#diagnostics_pragmas">Controlling Diagnostics via Pragmas</a></li> </ul> <li><a href="#precompiledheaders">Precompiled Headers</a></li> + <li><a href="#codegen">Controlling Code Generation</a></li> </ul> </li> <li><a href="#c">C Language Features</a> @@ -562,6 +563,29 @@ at the time of PCH use requires one of the PCH optimizations, <code>stat()</code> caching, to be disabled. However, this change is only likely to affect PCH files that reference a large number of headers.</p> +<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = --> +<h3 id="codegen">Controlling Code Generation</h3> +<!-- = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = --> + +<p>Clang provides a number of ways to control code generation. The options are listed below.</p> + +<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - --> +<dt id="opt_fcatch-undefined-behavior"><b>-fcatch-undefined-behavior</b>: Turn +on runtime code generation to check for undefined behavior.</dt> + +<dd>This option, which defaults to off, controls whether or not Clang +adds runtime checks for undefined runtime behavior. If the check fails, +<tt>__builtin_trap()</tt> is used to indicate failure. +The checks are: +<p> +<li>Subscripting where the static type of one operand is decayed from an + array type and the other operand is greater than the size of the array or + less than zero.</li> +<li>Shift operators where the amount shifted is greater or equal to the + promoted bit-width of the left-hand-side or less than zero.</li> +</p> +</dd> + <!-- ======================================================================= --> <h2 id="c">C Language Features</h2> <!-- ======================================================================= --> |