From 44cb65fff1fa26a2a1ff90290f172756f082c8a1 Mon Sep 17 00:00:00 2001 From: Tom Roeder Date: Thu, 5 Jun 2014 19:29:43 +0000 Subject: Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute. It includes a pass that rewrites all indirect calls to jumptable functions to pass through these tables. This also adds backend support for generating the jump-instruction tables on ARM and X86. Note that since the jumptable attribute creates a second function pointer for a function, any function marked with jumptable must also be marked with unnamed_addr. llvm-svn: 210280 --- 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 a9074bb294d..58475e2d3cb 100644 --- a/llvm/lib/IR/Attributes.cpp +++ b/llvm/lib/IR/Attributes.cpp @@ -173,6 +173,8 @@ std::string Attribute::getAsString(bool InAttrGrp) const { return "inlinehint"; if (hasAttribute(Attribute::InReg)) return "inreg"; + if (hasAttribute(Attribute::JumpTable)) + return "jumptable"; if (hasAttribute(Attribute::MinSize)) return "minsize"; if (hasAttribute(Attribute::Naked)) @@ -395,6 +397,7 @@ uint64_t AttributeImpl::getAttrMask(Attribute::AttrKind Val) { case Attribute::OptimizeNone: return 1ULL << 42; case Attribute::InAlloca: return 1ULL << 43; case Attribute::NonNull: return 1ULL << 44; + case Attribute::JumpTable: return 1ULL << 45; } llvm_unreachable("Unsupported attribute type"); } -- cgit v1.2.3