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Add a special streamer to libLTO that just records symbols definitions and

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uses.

The result produced by the streamer is used to give the linker more accurate
information and to add to llvm.compiler.used. The second improvement removes
the need for the user to add __attribute__((used)) to functions only used in
inline asm. The first one lets us build firefox with LTO on Darwin :-)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126830 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2011-03-02 04:14:42 +00:00
parent f7af396c95
commit 38c4e53549
7 changed files with 336 additions and 82 deletions
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9
include/llvm/Module.h
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@@ -211,15 +211,20 @@ public:
void setTargetTriple(StringRef T) { TargetTriple = T; }
/// Set the module-scope inline assembly blocks.
void setModuleInlineAsm(StringRef Asm) { GlobalScopeAsm = Asm; }
void setModuleInlineAsm(StringRef Asm) {
GlobalScopeAsm = Asm;
if (!GlobalScopeAsm.empty() &&
GlobalScopeAsm[GlobalScopeAsm.size()-1] != '\n')
GlobalScopeAsm += '\n';
}
/// Append to the module-scope inline assembly blocks, automatically inserting
/// a separating newline if necessary.
void appendModuleInlineAsm(StringRef Asm) {
GlobalScopeAsm += Asm;
if (!GlobalScopeAsm.empty() &&
GlobalScopeAsm[GlobalScopeAsm.size()-1] != '\n')
GlobalScopeAsm += '\n';
GlobalScopeAsm += Asm;
}
/// @}