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| <a name="g_t_002eloc-fileno-lineno-_005bcolumn_005d-_005boptions_005d"></a> |
| <h3 class="section">7.75 <code>.loc <var>fileno</var> <var>lineno</var> [<var>column</var>] [<var>options</var>]</code></h3> |
| <a name="index-loc-directive"></a> |
| <p>When emitting DWARF2 line number information, |
| the <code>.loc</code> directive will add a row to the <code>.debug_line</code> line |
| number matrix corresponding to the immediately following assembly |
| instruction. The <var>fileno</var>, <var>lineno</var>, and optional <var>column</var> |
| arguments will be applied to the <code>.debug_line</code> state machine before |
| the row is added. |
| </p> |
| <p>The <var>options</var> are a sequence of the following tokens in any order: |
| </p> |
| <dl compact="compact"> |
| <dt><code>basic_block</code></dt> |
| <dd><p>This option will set the <code>basic_block</code> register in the |
| <code>.debug_line</code> state machine to <code>true</code>. |
| </p> |
| </dd> |
| <dt><code>prologue_end</code></dt> |
| <dd><p>This option will set the <code>prologue_end</code> register in the |
| <code>.debug_line</code> state machine to <code>true</code>. |
| </p> |
| </dd> |
| <dt><code>epilogue_begin</code></dt> |
| <dd><p>This option will set the <code>epilogue_begin</code> register in the |
| <code>.debug_line</code> state machine to <code>true</code>. |
| </p> |
| </dd> |
| <dt><code>is_stmt <var>value</var></code></dt> |
| <dd><p>This option will set the <code>is_stmt</code> register in the |
| <code>.debug_line</code> state machine to <code>value</code>, which must be |
| either 0 or 1. |
| </p> |
| </dd> |
| <dt><code>isa <var>value</var></code></dt> |
| <dd><p>This directive will set the <code>isa</code> register in the <code>.debug_line</code> |
| state machine to <var>value</var>, which must be an unsigned integer. |
| </p> |
| </dd> |
| <dt><code>discriminator <var>value</var></code></dt> |
| <dd><p>This directive will set the <code>discriminator</code> register in the <code>.debug_line</code> |
| state machine to <var>value</var>, which must be an unsigned integer. |
| </p> |
| </dd> |
| </dl> |
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