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| author | Reid Spencer <rspencer@reidspencer.com> | 2006-12-03 16:53:48 +0000 |
|---|---|---|
| committer | Reid Spencer <rspencer@reidspencer.com> | 2006-12-03 16:53:48 +0000 |
| commit | 42ddd84addeabef697be2d2f7e33c8f8acb446d9 (patch) | |
| tree | caa56510ceef3a6230263c3ad93e7b36508034a4 /docs | |
| parent | e558c682510156b4f87c278354166d8acc7bc49c (diff) | |
| download | external_llvm-42ddd84addeabef697be2d2f7e33c8f8acb446d9.zip external_llvm-42ddd84addeabef697be2d2f7e33c8f8acb446d9.tar.gz external_llvm-42ddd84addeabef697be2d2f7e33c8f8acb446d9.tar.bz2 | |
Update for signless GEP semantics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32159 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/LangRef.html | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 5b7b125..7f03531 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -2491,9 +2491,9 @@ elements of the aggregate object to index to. The actual types of the arguments provided depend on the type of the first pointer argument. The '<tt>getelementptr</tt>' instruction is used to index down through the type levels of a structure or to a specific index in an array. When indexing into a -structure, only <tt>uint</tt> -integer constants are allowed. When indexing into an array or pointer, -<tt>int</tt> and <tt>long</tt> and <tt>ulong</tt> indexes are allowed.</p> +structure, only <tt>uint</tt> integer constants are allowed. When indexing +into an array or pointer, integers of any size are allowed, and will be sign +extended to 64-bit values.</p> <p>For example, let's consider a C code fragment and how it gets compiled to LLVM:</p> @@ -2534,9 +2534,10 @@ compiled to LLVM:</p> <p>The index types specified for the '<tt>getelementptr</tt>' instruction depend on the pointer type that is being indexed into. <a href="#t_pointer">Pointer</a> -and <a href="#t_array">array</a> types require <tt>int</tt>, -<tt>ulong</tt>, or <tt>long</tt> values, and <a href="#t_struct">structure</a> -types require <tt>uint</tt> <b>constants</b>.</p> +and <a href="#t_array">array</a> types can use any +<a href="#t_integer">integer</a> type but the value will always be sign extended +to 64-bits. <a href="#t_struct">Structure</a> types, require <tt>uint</tt> +<b>constants</b>.</p> <p>In the example above, the first index is indexing into the '<tt>%ST*</tt>' type, which is a pointer, yielding a '<tt>%ST</tt>' = '<tt>{ int, double, %RT |