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| author | Chris Lattner <sabre@nondot.org> | 2008-01-06 21:04:43 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2008-01-06 21:04:43 +0000 |
| commit | a31d1d7aea6db0f72b9dfb14fbf4f56c0dcaba84 (patch) | |
| tree | 4751450ab29e8fdd6f3c7f2fcad42f77c38f415f | |
| parent | 4b2cbcf4c275379f8c1b68f792db29cc7b7925ad (diff) | |
improve description of alignment, patch by Alain Frisch.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45662 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/LangRef.html | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 1e45e63178..4491afb834 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -2843,6 +2843,16 @@ marked as <tt>volatile</tt>, then the optimizer is not allowed to modify the number or order of execution of this <tt>load</tt> with other volatile <tt>load</tt> and <tt><a href="#i_store">store</a></tt> instructions. </p> +<p> +The optional "align" argument specifies the alignment of the operation +(that is, the alignment of the memory address). A value of 0 or an +omitted "align" argument means that the operation has the preferential +alignment for the target. It is the responsibility of the code emitter +to ensure that the alignment information is correct. Overestimating +the alignment results in an undefined behavior. Underestimating the +alignment may produce less efficient code. An alignment of 1 is always +safe. +</p> <h5>Semantics:</h5> <p>The location of memory pointed to is loaded.</p> <h5>Examples:</h5> @@ -2870,6 +2880,16 @@ operand. If the <tt>store</tt> is marked as <tt>volatile</tt>, then the optimizer is not allowed to modify the number or order of execution of this <tt>store</tt> with other volatile <tt>load</tt> and <tt><a href="#i_store">store</a></tt> instructions.</p> +<p> +The optional "align" argument specifies the alignment of the operation +(that is, the alignment of the memory address). A value of 0 or an +omitted "align" argument means that the operation has the preferential +alignment for the target. It is the responsibility of the code emitter +to ensure that the alignment information is correct. Overestimating +the alignment results in an undefined behavior. Underestimating the +alignment may produce less efficient code. An alignment of 1 is always +safe. +</p> <h5>Semantics:</h5> <p>The contents of memory are updated to contain '<tt><value></tt>' at the location specified by the '<tt><pointer></tt>' operand.</p> |