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More cleanups. No content change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145522 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -2800,7 +2800,7 @@ second_end:
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<div>
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<p>LLVM supports inline assembler expressions (as opposed
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to <a href="#moduleasm"> Module-Level Inline Assembly</a>) through the use of
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to <a href="#moduleasm">Module-Level Inline Assembly</a>) through the use of
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a special value. This value represents the inline assembler as a string
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(containing the instructions to emit), a list of operand constraints (stored
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as a string), a flag that indicates whether or not the inline asm
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@ -2842,23 +2842,27 @@ call void asm alignstack "eieio", ""()
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<p>If both keywords appear the '<tt>sideeffect</tt>' keyword must come
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first.</p>
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<!--
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<p>TODO: The format of the asm and constraints string still need to be
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documented here. Constraints on what can be done (e.g. duplication, moving,
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etc need to be documented). This is probably best done by reference to
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another document that covers inline asm from a holistic perspective.</p>
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-->
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<!-- _______________________________________________________________________ -->
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<h4>
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<a name="inlineasm_md">Inline Asm Metadata</a>
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<a name="inlineasm_md">Inline Asm Metadata</a>
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</h4>
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<div>
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<p>The call instructions that wrap inline asm nodes may have a "!srcloc" MDNode
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attached to it that contains a list of constant integers. If present, the
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code generator will use the integer as the location cookie value when report
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errors through the LLVMContext error reporting mechanisms. This allows a
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front-end to correlate backend errors that occur with inline asm back to the
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source code that produced it. For example:</p>
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<p>The call instructions that wrap inline asm nodes may have a
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"<tt>!srcloc</tt>" MDNode attached to it that contains a list of constant
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integers. If present, the code generator will use the integer as the
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location cookie value when report errors through the <tt>LLVMContext</tt>
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error reporting mechanisms. This allows a front-end to correlate backend
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errors that occur with inline asm back to the source code that produced it.
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For example:</p>
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<pre class="doc_code">
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call void asm sideeffect "something bad", ""()<b>, !srcloc !42</b>
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@ -2867,7 +2871,7 @@ call void asm sideeffect "something bad", ""()<b>, !srcloc !42</b>
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</pre>
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<p>It is up to the front-end to make sense of the magic numbers it places in the
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IR. If the MDNode contains multiple constants, the code generator will use
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IR. If the MDNode contains multiple constants, the code generator will use
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the one that corresponds to the line of the asm that the error occurs on.</p>
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</div>
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