From cbe34b4cc98148b386a0c96cd195e7f62f52a6e3 Mon Sep 17 00:00:00 2001 From: Hans Wennborg Date: Sat, 23 Jun 2012 11:37:03 +0000 Subject: Extend the IL for selecting TLS models (PR9788) This allows the user/front-end to specify a model that is better than what LLVM would choose by default. For example, a variable might be declared as @x = thread_local(initialexec) global i32 42 if it will not be used in a shared library that is dlopen'ed. If the specified model isn't supported by the target, or if LLVM can make a better choice, a different model may be used. llvm-svn: 159077 --- llvm/docs/BitCodeFormat.html | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'llvm/docs/BitCodeFormat.html') diff --git a/llvm/docs/BitCodeFormat.html b/llvm/docs/BitCodeFormat.html index 30145de5811..6a670f56b97 100644 --- a/llvm/docs/BitCodeFormat.html +++ b/llvm/docs/BitCodeFormat.html @@ -864,7 +864,7 @@ library name referenced.

MODULE_CODE_GLOBALVAR Record

-

[GLOBALVAR, pointer type, isconst, initid, linkage, alignment, section, visibility, threadlocal]

+

[GLOBALVAR, pointer type, isconst, initid, linkage, alignment, section, visibility, threadlocal, unnamed_addr]

The GLOBALVAR record (code 7) marks the declaration or definition of a global variable. The operand fields are:

@@ -915,8 +915,16 @@ encoding of the visibility of this variable: -
  • threadlocal: If present and non-zero, indicates that the variable -is thread_local
    • +
  • threadlocal: If present, an encoding of the thread local storage +mode of the variable: +
      +
    • not thread local: code 0
      • +
    • thread local; default TLS model: code 1
      • +
    • localdynamic: code 2
      • +
    • initialexec: code 3
      • +
    • localexec: code 4
      • +
    +
  • unnamed_addr: If present and non-zero, indicates that the variable has unnamed_addr
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