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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182638 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLLexer.cpp b/lib/AsmParser/LLLexer.cpp
index e7a9f2a..82d9975 100644
--- a/lib/AsmParser/LLLexer.cpp
+++ b/lib/AsmParser/LLLexer.cpp
@@ -564,6 +564,7 @@
KEYWORD(alwaysinline);
KEYWORD(byval);
+ KEYWORD(cold);
KEYWORD(inlinehint);
KEYWORD(inreg);
KEYWORD(minsize);
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 62d8070..b22d251f 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -909,6 +909,7 @@
continue;
}
case lltok::kw_alwaysinline: B.addAttribute(Attribute::AlwaysInline); break;
+ case lltok::kw_cold: B.addAttribute(Attribute::Cold); break;
case lltok::kw_inlinehint: B.addAttribute(Attribute::InlineHint); break;
case lltok::kw_minsize: B.addAttribute(Attribute::MinSize); break;
case lltok::kw_naked: B.addAttribute(Attribute::Naked); break;
@@ -1222,6 +1223,7 @@
case lltok::kw_alignstack:
case lltok::kw_alwaysinline:
+ case lltok::kw_cold:
case lltok::kw_inlinehint:
case lltok::kw_minsize:
case lltok::kw_naked:
diff --git a/lib/AsmParser/LLToken.h b/lib/AsmParser/LLToken.h
index 3bf54fa..e889a2b 100644
--- a/lib/AsmParser/LLToken.h
+++ b/lib/AsmParser/LLToken.h
@@ -96,6 +96,7 @@
kw_alwaysinline,
kw_sanitize_address,
kw_byval,
+ kw_cold,
kw_inlinehint,
kw_inreg,
kw_minsize,