2 Commits

Author	SHA1	Message	Date
Evan Cheng	eb205858ec	Follow up to r165072. Try a different approach: only move the load when it's going to be folded into the call. rdar://12437604 ... llvm-svn: 165287	2012-10-05 01:48:22 +00:00
Evan Cheng	19255e0c70	Fix a serious X86 instruction selection bug. In ... X86DAGToDAGISel::PreprocessISelDAG(), isel is moving load inside callseq_start / callseq_end so it can be folded into a call. This can create a cycle in the DAG when the call is glued to a copytoreg. We have been lucky this hasn't caused too many issues because the pre-ra scheduler has special handling of call sequences. However, it has caused a crash in a specific tailcall case. rdar://12393897 llvm-svn: 165072	2012-10-02 23:49:13 +00:00