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authorDale Johannesen <dalej@apple.com>2009-10-21 23:28:00 +0000
committerDale Johannesen <dalej@apple.com>2009-10-21 23:28:00 +0000
commit8ba2d5befc05ca73d3bac8708819bbbe759e2cf9 (patch)
tree86f4991953c35b62870c5621427dcdcd1f392bd8 /docs
parente31cd34b8a7c58ef3ba3fef102b4281a84cb4ff8 (diff)
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Rename msasm to alignstack per review.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84795 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'docs')
-rw-r--r--docs/LangRef.html16
1 files changed, 10 insertions, 6 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 236538d3e4..f3e5d9f2e1 100644
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@@ -2339,9 +2339,9 @@ has undefined behavior.</p>
a special value. This value represents the inline assembler as a string
(containing the instructions to emit), a list of operand constraints (stored
as a string), a flag that indicates whether or not the inline asm
- expression has side effects, and a flag indicating whether the asm came
- originally from an asm block. An example inline assembler
- expression is:</p>
+ expression has side effects, and a flag indicating whether the function
+ containing the asm needs to align its stack conservatively. An example
+ inline assembler expression is:</p>
<div class="doc_code">
<pre>
@@ -2369,12 +2369,16 @@ call void asm sideeffect "eieio", ""()
</pre>
</div>
-<p>Inline asms derived from asm blocks are similarly marked with the
- '<tt>msasm</tt>' keyword:</p>
+<p>In some cases inline asms will contain code that will not work unless the
+ stack is aligned in some way, such as calls or SSE instructions on x86,
+ yet will not contain code that does that alignment within the asm.
+ The compiler should make conservative assumptions about what the asm might
+ contain and should generate its usual stack alignment code in the prologue
+ if the '<tt>alignstack</tt>' keyword is present:</p>
<div class="doc_code">
<pre>
-call void asm msasm "eieio", ""()
+call void asm alignstack "eieio", ""()
</pre>
</div>