From ca396e391e13d417605ebed06780d92c88f14a6b Mon Sep 17 00:00:00 2001 From: Tim Northover Date: Tue, 11 Mar 2014 10:48:52 +0000 Subject: IR: add a second ordering operand to cmpxhg for failure The syntax for "cmpxchg" should now look something like: cmpxchg i32* %addr, i32 42, i32 3 acquire monotonic where the second ordering argument gives the required semantics in the case that no exchange takes place. It should be no stronger than the first ordering constraint and cannot be either "release" or "acq_rel" (since no store will have taken place). rdar://problem/15996804 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203559 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/CppBackend/CPPBackend.cpp | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'lib/Target/CppBackend') diff --git a/lib/Target/CppBackend/CPPBackend.cpp b/lib/Target/CppBackend/CPPBackend.cpp index b13709914b..31585d9296 100644 --- a/lib/Target/CppBackend/CPPBackend.cpp +++ b/lib/Target/CppBackend/CPPBackend.cpp @@ -1567,12 +1567,16 @@ void CppWriter::printInstruction(const Instruction *I, } case Instruction::AtomicCmpXchg: { const AtomicCmpXchgInst *cxi = cast(I); - StringRef Ordering = ConvertAtomicOrdering(cxi->getOrdering()); + StringRef SuccessOrdering = + ConvertAtomicOrdering(cxi->getSuccessOrdering()); + StringRef FailureOrdering = + ConvertAtomicOrdering(cxi->getFailureOrdering()); StringRef CrossThread = ConvertAtomicSynchScope(cxi->getSynchScope()); Out << "AtomicCmpXchgInst* " << iName << " = new AtomicCmpXchgInst(" << opNames[0] << ", " << opNames[1] << ", " << opNames[2] << ", " - << Ordering << ", " << CrossThread << ", " << bbname + << SuccessOrdering << ", " << FailureOrdering << ", " + << CrossThread << ", " << bbname << ");"; nl(Out) << iName << "->setName(\""; printEscapedString(cxi->getName()); -- cgit v1.2.3