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| author | Dan Gohman <gohman@apple.com> | 2009-11-09 18:40:39 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-11-09 18:40:39 +0000 |
| commit | 66c4d610103b1a0f1487a2daf3b390021b952601 (patch) | |
| tree | 21fae1c753847ecb7918d560aea2b2570000895f /llvm/docs/LangRef.html | |
| parent | e4310c8273a9f7f0f32fa180b02acf29a29aa18c (diff) | |
| download | bcm5719-llvm-66c4d610103b1a0f1487a2daf3b390021b952601.tar.gz bcm5719-llvm-66c4d610103b1a0f1487a2daf3b390021b952601.zip | |
Remove the "special case" for zero-length arrays, and rephrase this
paragraph to be more precise.
llvm-svn: 86572
Diffstat (limited to 'llvm/docs/LangRef.html')
| -rw-r--r-- | llvm/docs/LangRef.html | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/llvm/docs/LangRef.html b/llvm/docs/LangRef.html index eea1f030609..be2b93b5a03 100644 --- a/llvm/docs/LangRef.html +++ b/llvm/docs/LangRef.html @@ -1576,12 +1576,13 @@ Classifications</a> </div> </tr> </table> -<p>Note that 'variable sized arrays' can be implemented in LLVM with a zero - length array. Normally, accesses past the end of an array are undefined in - LLVM (e.g. it is illegal to access the 5th element of a 3 element array). As - a special case, however, zero length arrays are recognized to be variable - length. This allows implementation of 'pascal style arrays' with the LLVM - type "<tt>{ i32, [0 x float]}</tt>", for example.</p> +<p>Except when the <tt>inbounds</tt> keyword is present, there is no limitation + on indexing beyond the end of the array implied by the static type (though + any loads or stores must of course be within the bounds of the allocated + object!). This means that single-dimension 'variable sized array' addressing + can be implemented in LLVM with a zero length array type. An implementation + of 'pascal style arrays' in LLVM could use the type + "<tt>{ i32, [0 x float]}</tt>", for example.</p> <p>Note that the code generator does not yet support large aggregate types to be used as function return types. The specific limit on how large an aggregate |

