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| author | Dale Johannesen <dalej@apple.com> | 2009-10-21 23:28:00 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2009-10-21 23:28:00 +0000 |
| commit | 8ba2d5befc05ca73d3bac8708819bbbe759e2cf9 (patch) | |
| tree | 86f4991953c35b62870c5621427dcdcd1f392bd8 /docs | |
| parent | e31cd34b8a7c58ef3ba3fef102b4281a84cb4ff8 (diff) | |
| download | external_llvm-8ba2d5befc05ca73d3bac8708819bbbe759e2cf9.zip external_llvm-8ba2d5befc05ca73d3bac8708819bbbe759e2cf9.tar.gz external_llvm-8ba2d5befc05ca73d3bac8708819bbbe759e2cf9.tar.bz2 | |
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.html | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/docs/LangRef.html b/docs/LangRef.html index 236538d..f3e5d9f 100644 --- a/docs/LangRef.html +++ b/docs/LangRef.html @@ -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> |