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<head>
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<title>GNU Compiler Collection (GCC) Internals: GIMPLE_ASSIGN</title>
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<meta name="description" content="GNU Compiler Collection (GCC) Internals: GIMPLE_ASSIGN">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Tuple-specific-accessors.html#Tuple-specific-accessors" rel="up" title="Tuple specific accessors">
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<link href="GIMPLE_005fBIND.html#GIMPLE_005fBIND" rel="next" title="GIMPLE_BIND">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="GIMPLE_005fASSIGN"></a>
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<div class="header">
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<p>
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Next: <a href="GIMPLE_005fBIND.html#GIMPLE_005fBIND" accesskey="n" rel="next"><code>GIMPLE_BIND</code></a>, Previous: <a href="GIMPLE_005fASM.html#GIMPLE_005fASM" accesskey="p" rel="prev"><code>GIMPLE_ASM</code></a>, Up: <a href="Tuple-specific-accessors.html#Tuple-specific-accessors" accesskey="u" rel="up">Tuple specific accessors</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="GIMPLE_005fASSIGN-1"></a>
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<h4 class="subsection">11.8.2 <code>GIMPLE_ASSIGN</code></h4>
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<a name="index-GIMPLE_005fASSIGN"></a>
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<dl>
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<dt><a name="index-_002agimple_005fbuild_005fassign"></a>GIMPLE function: <em>gassign</em> <strong>*gimple_build_assign</strong> <em>(tree lhs, tree rhs)</em></dt>
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<dd><p>Build a <code>GIMPLE_ASSIGN</code> statement. The left-hand side is an lvalue
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passed in lhs. The right-hand side can be either a unary or
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binary tree expression. The expression tree rhs will be
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flattened and its operands assigned to the corresponding operand
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slots in the new statement. This function is useful when you
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already have a tree expression that you want to convert into a
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tuple. However, try to avoid building expression trees for the
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sole purpose of calling this function. If you already have the
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operands in separate trees, it is better to use
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<code>gimple_build_assign</code> with <code>enum tree_code</code> argument and separate
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arguments for each operand.
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</p></dd></dl>
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<dl>
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<dt><a name="index-_002agimple_005fbuild_005fassign-1"></a>GIMPLE function: <em>gassign</em> <strong>*gimple_build_assign</strong> <em>(tree lhs, enum tree_code subcode, tree op1, tree op2, tree op3)</em></dt>
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<dd><p>This function is similar to two operand <code>gimple_build_assign</code>,
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but is used to build a <code>GIMPLE_ASSIGN</code> statement when the operands of the
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right-hand side of the assignment are already split into
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different operands.
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</p>
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<p>The left-hand side is an lvalue passed in lhs. Subcode is the
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<code>tree_code</code> for the right-hand side of the assignment. Op1, op2 and op3
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are the operands.
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</p></dd></dl>
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<dl>
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<dt><a name="index-_002agimple_005fbuild_005fassign-2"></a>GIMPLE function: <em>gassign</em> <strong>*gimple_build_assign</strong> <em>(tree lhs, enum tree_code subcode, tree op1, tree op2)</em></dt>
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<dd><p>Like the above 5 operand <code>gimple_build_assign</code>, but with the last
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argument <code>NULL</code> - this overload should not be used for
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<code>GIMPLE_TERNARY_RHS</code> assignments.
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</p></dd></dl>
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<dl>
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<dt><a name="index-_002agimple_005fbuild_005fassign-3"></a>GIMPLE function: <em>gassign</em> <strong>*gimple_build_assign</strong> <em>(tree lhs, enum tree_code subcode, tree op1)</em></dt>
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<dd><p>Like the above 4 operand <code>gimple_build_assign</code>, but with the last
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argument <code>NULL</code> - this overload should be used only for
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<code>GIMPLE_UNARY_RHS</code> and <code>GIMPLE_SINGLE_RHS</code> assignments.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimplify_005fassign"></a>GIMPLE function: <em>gimple</em> <strong>gimplify_assign</strong> <em>(tree dst, tree src, gimple_seq *seq_p)</em></dt>
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<dd><p>Build a new <code>GIMPLE_ASSIGN</code> tuple and append it to the end of
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<code>*SEQ_P</code>.
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</p></dd></dl>
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<p><code>DST</code>/<code>SRC</code> are the destination and source respectively. You can
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pass ungimplified trees in <code>DST</code> or <code>SRC</code>, in which
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case they will be converted to a gimple operand if necessary.
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</p>
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<p>This function returns the newly created <code>GIMPLE_ASSIGN</code> tuple.
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</p>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs_005fcode"></a>GIMPLE function: <em>enum tree_code</em> <strong>gimple_assign_rhs_code</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the code of the expression computed on the <code>RHS</code> of
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assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs_005fclass"></a>GIMPLE function: <em>enum gimple_rhs_class</em> <strong>gimple_assign_rhs_class</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the gimple rhs class of the code for the expression
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computed on the rhs of assignment statement <code>G</code>. This will never
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return <code>GIMPLE_INVALID_RHS</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005flhs"></a>GIMPLE function: <em>tree</em> <strong>gimple_assign_lhs</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the <code>LHS</code> of assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005flhs_005fptr"></a>GIMPLE function: <em>tree *</em> <strong>gimple_assign_lhs_ptr</strong> <em>(gimple g)</em></dt>
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<dd><p>Return a pointer to the <code>LHS</code> of assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs1"></a>GIMPLE function: <em>tree</em> <strong>gimple_assign_rhs1</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the first operand on the <code>RHS</code> of assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs1_005fptr"></a>GIMPLE function: <em>tree *</em> <strong>gimple_assign_rhs1_ptr</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the address of the first operand on the <code>RHS</code> of assignment
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statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs2"></a>GIMPLE function: <em>tree</em> <strong>gimple_assign_rhs2</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the second operand on the <code>RHS</code> of assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs2_005fptr"></a>GIMPLE function: <em>tree *</em> <strong>gimple_assign_rhs2_ptr</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the address of the second operand on the <code>RHS</code> of assignment
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statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs3"></a>GIMPLE function: <em>tree</em> <strong>gimple_assign_rhs3</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the third operand on the <code>RHS</code> of assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005frhs3_005fptr"></a>GIMPLE function: <em>tree *</em> <strong>gimple_assign_rhs3_ptr</strong> <em>(gimple g)</em></dt>
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<dd><p>Return the address of the third operand on the <code>RHS</code> of assignment
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statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005fset_005flhs"></a>GIMPLE function: <em>void</em> <strong>gimple_assign_set_lhs</strong> <em>(gimple g, tree lhs)</em></dt>
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<dd><p>Set <code>LHS</code> to be the <code>LHS</code> operand of assignment statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005fset_005frhs1"></a>GIMPLE function: <em>void</em> <strong>gimple_assign_set_rhs1</strong> <em>(gimple g, tree rhs)</em></dt>
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<dd><p>Set <code>RHS</code> to be the first operand on the <code>RHS</code> of assignment
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statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005fset_005frhs2"></a>GIMPLE function: <em>void</em> <strong>gimple_assign_set_rhs2</strong> <em>(gimple g, tree rhs)</em></dt>
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<dd><p>Set <code>RHS</code> to be the second operand on the <code>RHS</code> of assignment
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statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005fset_005frhs3"></a>GIMPLE function: <em>void</em> <strong>gimple_assign_set_rhs3</strong> <em>(gimple g, tree rhs)</em></dt>
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<dd><p>Set <code>RHS</code> to be the third operand on the <code>RHS</code> of assignment
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statement <code>G</code>.
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</p></dd></dl>
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<dl>
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<dt><a name="index-gimple_005fassign_005fcast_005fp-1"></a>GIMPLE function: <em>bool</em> <strong>gimple_assign_cast_p</strong> <em>(const_gimple s)</em></dt>
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<dd><p>Return true if <code>S</code> is a type-cast assignment.
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</p></dd></dl>
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<hr>
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<div class="header">
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<p>
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Next: <a href="GIMPLE_005fBIND.html#GIMPLE_005fBIND" accesskey="n" rel="next"><code>GIMPLE_BIND</code></a>, Previous: <a href="GIMPLE_005fASM.html#GIMPLE_005fASM" accesskey="p" rel="prev"><code>GIMPLE_ASM</code></a>, Up: <a href="Tuple-specific-accessors.html#Tuple-specific-accessors" accesskey="u" rel="up">Tuple specific accessors</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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