From c63995394de60996ebfe52a47cf2e3a0716d7e3c Mon Sep 17 00:00:00 2001 From: Diego Novillo Date: Fri, 24 May 2013 12:26:52 +0000 Subject: 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 --- llvm/lib/IR/Attributes.cpp | 3 +++ 1 file changed, 3 insertions(+) (limited to 'llvm/lib/IR/Attributes.cpp') diff --git a/llvm/lib/IR/Attributes.cpp b/llvm/lib/IR/Attributes.cpp index 4fe6f9d..e48ebb1 100644 --- a/llvm/lib/IR/Attributes.cpp +++ b/llvm/lib/IR/Attributes.cpp @@ -217,6 +217,8 @@ std::string Attribute::getAsString(bool InAttrGrp) const { return "uwtable"; if (hasAttribute(Attribute::ZExt)) return "zeroext"; + if (hasAttribute(Attribute::Cold)) + return "cold"; // FIXME: These should be output like this: // @@ -396,6 +398,7 @@ uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) { case Attribute::SanitizeMemory: return 1ULL << 37; case Attribute::NoBuiltin: return 1ULL << 38; case Attribute::Returned: return 1ULL << 39; + case Attribute::Cold: return 1ULL << 40; } llvm_unreachable("Unsupported attribute type"); } -- cgit v1.1