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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36325 91177308-0d34-0410-b5e6-96231b3b80d8
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Jeff Cohen 2007-04-22 01:17:39 +00:00
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@ -1068,16 +1068,14 @@ instruction.</p>
<h5>Examples:</h5>
<table class="layout">
<tr class="layout">
<td class="left">
<tt>{ i32, i32, i32 }</tt><br/>
<tt>{ float, i32 (i32) * }</tt><br/>
</td>
<td class="left">
a triple of three <tt>i32</tt> values<br/>
A pair, where the first element is a <tt>float</tt> and the second element
is a <a href="#t_pointer">pointer</a> to a <a href="#t_function">function</a>
that takes an <tt>i32</tt>, returning an <tt>i32</tt>.<br/>
</td>
<td class="left"><tt>{ i32, i32, i32 }</tt></td>
<td class="left">A triple of three <tt>i32</tt> values</td>
</tr><tr class="layout">
<td class="left"><tt>{&nbsp;float,&nbsp;i32&nbsp;(i32)&nbsp;*&nbsp;}</tt></td>
<td class="left">A pair, where the first element is a <tt>float</tt> and the
second element is a <a href="#t_pointer">pointer</a> to a
<a href="#t_function">function</a> that takes an <tt>i32</tt>, returning
an <tt>i32</tt>.</td>
</tr>
</table>
</div>
@ -1100,16 +1098,14 @@ instruction.</p>
<h5>Examples:</h5>
<table class="layout">
<tr class="layout">
<td class="left">
<tt> &lt; { i32, i32, i32 } &gt; </tt><br/>
<tt> &lt; { float, i32 (i32) * } &gt; </tt><br/>
</td>
<td class="left">
a triple of three <tt>i32</tt> values<br/>
A pair, where the first element is a <tt>float</tt> and the second element
is a <a href="#t_pointer">pointer</a> to a <a href="#t_function">function</a>
that takes an <tt>i32</tt>, returning an <tt>i32</tt>.<br/>
</td>
<td class="left"><tt>&lt; { i32, i32, i32 } &gt;</tt></td>
<td class="left">A triple of three <tt>i32</tt> values</td>
</tr><tr class="layout">
<td class="left"><tt>&lt;&nbsp;{&nbsp;float,&nbsp;i32&nbsp;(i32)&nbsp;*&nbsp;}&nbsp;&gt;</tt></td>
<td class="left">A pair, where the first element is a <tt>float</tt> and the
second element is a <a href="#t_pointer">pointer</a> to a
<a href="#t_function">function</a> that takes an <tt>i32</tt>, returning
an <tt>i32</tt>.</td>
</tr>
</table>
</div>
@ -1302,7 +1298,7 @@ and smaller aggregate constants.</p>
<dd>Vector constants are represented with notation similar to vector type
definitions (a comma separated list of elements, surrounded by
less-than/greater-than's (<tt>&lt;&gt;</tt>)). For example: "<tt>&lt; i32 42,
i32 11, i32 74, i32 100 &gt;</tt>". VEctor constants must have <a
i32 11, i32 74, i32 100 &gt;</tt>". Vector constants must have <a
href="#t_vector">vector type</a>, and the number and types of elements must
match those specified by the type.
</dd>
@ -1400,12 +1396,12 @@ following is the syntax for constant expressions:</p>
<dt><b><tt>uitofp ( CST to TYPE )</tt></b></dt>
<dd>Convert an unsigned integer constant to the corresponding floating point
constant. TYPE must be floating point. CST must be of integer type. If the
value won't fit in the floating point type, the results are undefined.</dd>
value won't fit in the floating point type, precision may be lost.</dd>
<dt><b><tt>sitofp ( CST to TYPE )</tt></b></dt>
<dd>Convert a signed integer constant to the corresponding floating point
constant. TYPE must be floating point. CST must be of integer type. If the
value won't fit in the floating point type, the results are undefined.</dd>
value won't fit in the floating point type, precision may be lost.</dd>
<dt><b><tt>ptrtoint ( CST to TYPE )</tt></b></dt>
<dd>Convert a pointer typed constant to the corresponding integer constant
@ -1746,10 +1742,10 @@ exception. Additionally, this is important for implementation of
<h5>Example:</h5>
<pre>
%retval = invoke i32 %Test(i32 15) to label %Continue
unwind label %TestCleanup <i>; {i32}:retval set</i>
%retval = invoke <a href="#callingconv">coldcc</a> i32 %Test(i32 15) to label %Continue
unwind label %TestCleanup <i>; {i32}:retval set</i>
%retval = invoke i32 %Test(i32 15) to label %Continue
unwind label %TestCleanup <i>; {i32}:retval set</i>
%retval = invoke <a href="#callingconv">coldcc</a> i32 %Test(i32 15) to label %Continue
unwind label %TestCleanup <i>; {i32}:retval set</i>
</pre>
</div>
@ -1950,10 +1946,10 @@ Instruction</a> </div>
<p>The '<tt>fdiv</tt>' instruction returns the quotient of its two
operands.</p>
<h5>Arguments:</h5>
<p>The two arguments to the '<tt>div</tt>' instruction must be
<p>The two arguments to the '<tt>fdiv</tt>' instruction must be
<a href="#t_floating">floating point</a> values. Both arguments must have
identical types. This instruction can also take <a href="#t_vector">vector</a>
versions of the values in which case the elements must be floating point.</p>
versions of floating point values.</p>
<h5>Semantics:</h5>
<p>The value produced is the floating point quotient of the two operands.</p>
<h5>Example:</h5>
@ -2075,7 +2071,7 @@ Instruction</a> </div>
<h5>Overview:</h5>
<p>The '<tt>lshr</tt>' instruction (logical shift right) returns the first
operand shifted to the right a specified number of bits.</p>
operand shifted to the right a specified number of bits with zero fill.</p>
<h5>Arguments:</h5>
<p>Both arguments to the '<tt>lshr</tt>' instruction must be the same
@ -2106,7 +2102,7 @@ Instruction</a> </div>
<h5>Overview:</h5>
<p>The '<tt>ashr</tt>' instruction (arithmetic shift right) returns the first
operand shifted to the right a specified number of bits.</p>
operand shifted to the right a specified number of bits with sign extension.</p>
<h5>Arguments:</h5>
<p>Both arguments to the '<tt>ashr</tt>' instruction must be the same
@ -2299,7 +2295,7 @@ identical types.</p>
<div class="doc_text">
<p>LLVM supports several instructions to represent vector operations in a
target-independent manner. This instructions cover the element-access and
target-independent manner. These instructions cover the element-access and
vector-specific operations needed to process vectors effectively. While LLVM
does directly support these vector operations, many sophisticated algorithms
will want to use target-specific intrinsics to take full advantage of a specific
@ -2447,7 +2443,7 @@ operand may be undef if performing a shuffle from only one vector.
<pre>
%result = shufflevector &lt;4 x i32&gt; %v1, &lt;4 x i32&gt; %v2,
&lt;4 x i32&gt; &lt;i32 0, i32 4, i32 1, i32 5&gt; <i>; yields &lt;4 x i32&gt;</i>
&lt;4 x i32&gt; &lt;i32 0, i32 4, i32 1, i32 5&gt; <i>; yields &lt;4 x i32&gt;</i>
%result = shufflevector &lt;4 x i32&gt; %v1, &lt;4 x i32&gt; undef,
&lt;4 x i32&gt; &lt;i32 0, i32 1, i32 2, i32 3&gt; <i>; yields &lt;4 x i32&gt;</i> - Identity shuffle.
</pre>
@ -2569,8 +2565,8 @@ after this instruction executes.</p>
<h5>Overview:</h5>
<p>The '<tt>alloca</tt>' instruction allocates memory on the current
stack frame of the procedure that is live until the current function
<p>The '<tt>alloca</tt>' instruction allocates memory on the stack frame of the
currently executing function, to be automatically released when this function
returns to its caller.</p>
<h5>Arguments:</h5>
@ -2641,7 +2637,7 @@ Instruction</a> </div>
<p>The '<tt>store</tt>' instruction is used to write to memory.</p>
<h5>Arguments:</h5>
<p>There are two arguments to the '<tt>store</tt>' instruction: a value
to store and an address in which to store it. The type of the '<tt>&lt;pointer&gt;</tt>'
to store and an address at which to store it. The type of the '<tt>&lt;pointer&gt;</tt>'
operand must be a pointer to the type of the '<tt>&lt;value&gt;</tt>'
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
@ -2725,7 +2721,7 @@ compiled to LLVM:</p>
on the pointer type that is being indexed into. <a href="#t_pointer">Pointer</a>
and <a href="#t_array">array</a> types can use a 32-bit or 64-bit
<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>i32</tt>
to 64-bits. <a href="#t_struct">Structure</a> types require <tt>i32</tt>
<b>constants</b>.</p>
<p>In the example above, the first index is indexing into the '<tt>%ST*</tt>'
@ -2745,8 +2741,8 @@ the LLVM code for the given testcase is equivalent to:</p>
<pre>
define i32* %foo(%ST* %s) {
%t1 = getelementptr %ST* %s, i32 1 <i>; yields %ST*:%t1</i>
%t2 = getelementptr %ST* %t1, i32 0, i32 2 <i>; yields %RT*:%t2</i>
%t3 = getelementptr %RT* %t2, i32 0, i32 1 <i>; yields [10 x [20 x i32]]*:%t3</i>
%t2 = getelementptr %ST* %t1, i32 0, i32 2 <i>; yields %RT*:%t2</i>
%t3 = getelementptr %RT* %t2, i32 0, i32 1 <i>; yields [10 x [20 x i32]]*:%t3</i>
%t4 = getelementptr [10 x [20 x i32]]* %t3, i32 0, i32 5 <i>; yields [20 x i32]*:%t4</i>
%t5 = getelementptr [20 x i32]* %t4, i32 0, i32 13 <i>; yields i32*:%t5</i>
ret i32* %t5
@ -3073,7 +3069,7 @@ be a <a href="#t_floating">floating point</a> type.</p>
<h5>Semantics:</h5>
<p>The '<tt>uitofp</tt>' instruction interprets its operand as an unsigned
integer quantity and converts it to the corresponding floating point value. If
the value cannot fit in the floating point value, the results are undefined.</p>
the value cannot fit in the floating point value, precision may be lost.</p>
<h5>Example:</h5>
@ -3106,7 +3102,7 @@ a <a href="#t_floating">floating point</a> type.</p>
<h5>Semantics:</h5>
<p>The '<tt>sitofp</tt>' instruction interprets its operand as a signed
integer quantity and converts it to the corresponding floating point value. If
the value cannot fit in the floating point value, the results are undefined.</p>
the value cannot fit in the floating point value, precision may be lost.</p>
<h5>Example:</h5>
<pre>