Implement x86 support for @llvm.prefetch. It corresponds to prefetcht{0|1|2} and prefetchnta instructions.
llvm-svn: 48042
diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 22ddd83..7c70d04 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -287,6 +287,9 @@
setOperationAction(ISD::MEMSET , MVT::Other, Custom);
setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
+ if (!Subtarget->hasSSE1())
+ setOperationAction(ISD::PREFETCH , MVT::Other, Expand);
+
if (!Subtarget->hasSSE2())
setOperationAction(ISD::MEMBARRIER , MVT::Other, Expand);