From 0531ec5fcd743940a1e3074e94d764cfdbc8c135 Mon Sep 17 00:00:00 2001 From: Andrew Lenharth Date: Sat, 16 Feb 2008 14:46:26 +0000 Subject: I cannot find a libgcc function for this builtin. Therefor expanding it to a noop (which is how it use to be treated). If someone who knows the x86 backend better than me could tell me how to get a lock prefix on an instruction, that would be nice to complete x86 support. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47213 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/CBackend/CBackend.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/Target/CBackend') diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp index d434eb9..334f6fe 100644 --- a/lib/Target/CBackend/CBackend.cpp +++ b/lib/Target/CBackend/CBackend.cpp @@ -2459,6 +2459,7 @@ void CWriter::lowerIntrinsics(Function &F) { if (Function *F = CI->getCalledFunction()) switch (F->getIntrinsicID()) { case Intrinsic::not_intrinsic: + case Intrinsic::memory_barrier: case Intrinsic::vastart: case Intrinsic::vacopy: case Intrinsic::vaend: @@ -2544,6 +2545,9 @@ void CWriter::visitCallInst(CallInst &I) { WroteCallee = true; break; } + case Intrinsic::memory_barrier: + Out << "0; __sync_syncronize()"; + return; case Intrinsic::vastart: Out << "0; "; -- cgit v1.1