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Diffstat (limited to 'docs/LangRef.html')
| -rw-r--r-- | docs/LangRef.html | 37 |
1 files changed, 9 insertions, 28 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 8b17e0e6d425..ba09f4c4bfbb 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -7257,8 +7257,8 @@ LLVM</a>.</p> <h5>Syntax:</h5> <pre> - declare i32 @llvm.objectsize.i32( i8* <ptr>, i32 <type> ) - declare i64 @llvm.objectsize.i64( i8* <ptr>, i32 <type> ) + declare i32 @llvm.objectsize.i32( i8* <object>, i1 <type> ) + declare i64 @llvm.objectsize.i64( i8* <object>, i1 <type> ) </pre> <h5>Overview:</h5> @@ -7267,34 +7267,15 @@ LLVM</a>.</p> operation like memcpy will either overflow a buffer that corresponds to an object, or b) to determine that a runtime check for overflow isn't necessary. An object in this context means an allocation of a - specific <a href="#typesystem">type</a>.</p> + specific class, structure, array, or other object.</p> <h5>Arguments:</h5> <p>The <tt>llvm.objectsize</tt> intrinsic takes two arguments. The first - argument is a pointer to the object <tt>ptr</tt>. The second argument - is an integer <tt>type</tt> which ranges from 0 to 3. The first bit in - the type corresponds to a return value based on whole objects, - and the second bit whether or not we return the maximum or minimum - remaining bytes computed.</p> -<table class="layout"> - <tr class="layout"> - <td class="left"><tt>00</tt></td> - <td class="left">whole object, maximum number of bytes</td> - </tr> - <tr class="layout"> - <td class="left"><tt>01</tt></td> - <td class="left">partial object, maximum number of bytes</td> - </tr> - <tr class="layout"> - <td class="left"><tt>10</tt></td> - <td class="left">whole object, minimum number of bytes</td> - </tr> - <tr class="layout"> - <td class="left"><tt>11</tt></td> - <td class="left">partial object, minimum number of bytes</td> - </tr> -</table> - + argument is a pointer to or into the <tt>object</tt>. The second argument + is a boolean 0 or 1. This argument determines whether you want the + maximum (0) or minimum (1) bytes remaining. This needs to be a literal 0 or + 1, variables are not allowed.</p> + <h5>Semantics:</h5> <p>The <tt>llvm.objectsize</tt> intrinsic is lowered to either a constant representing the size of the object concerned or <tt>i32/i64 -1 or 0</tt> @@ -7313,7 +7294,7 @@ LLVM</a>.</p> <a href="mailto:sabre@nondot.org">Chris Lattner</a><br> <a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br> - Last modified: $Date: 2009-12-05 03:46:03 +0100 (Sat, 05 Dec 2009) $ + Last modified: $Date: 2009-12-23 01:29:49 +0100 (Wed, 23 Dec 2009) $ </address> </body> |