Add a new function attribute 'cold' to functions.
Other than recognizing the attribute, the patch does little else.
It changes the branch probability analyzer so that edges into
blocks postdominated by a cold function are given low weight.
Added analysis and code generation tests. Added documentation for the
new attribute.
llvm-svn: 182638
diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index 0920c5d..409c0f1 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -166,6 +166,7 @@
and the path forward agreed upon.
LLVMAddressSafety = 1ULL << 32,
LLVMStackProtectStrongAttribute = 1ULL<<33
+ LLVMCold = 1ULL << 34
*/
} LLVMAttribute;