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Author SHA1 Message Date
Manman Ren 16649b0107 TBAA: remove !tbaa from testing cases if not used. 
This will make it easier to turn on struct-path aware TBAA since the metadata
format will change.

llvm-svn: 180935
 2013-05-02 18:11:35 +00:00
Michael Liao da22b30be5 Fix PR15355 
- Clear 'mayStore' flag when loading from the atomic variable before the
  spin loop
- Clear kill flag from one use to multiple use in registers forming the
  address to that atomic variable
- don't use a physical register as live-in register in BB (neither entry
  nor landing pad.) by copying it into virtual register

(patch by Cameron Zwarich)

llvm-svn: 176538
 2013-03-06 00:17:04 +00:00
Michael Liao 3dffc5e2b7 Fix an issue of pseudo atomic instruction DAG schedule 
- Add list of physical registers clobbered in pseudo atomic insts
  Physical registers are clobbered when pseudo atomic instructions are
  expanded. Add them in clobber list to prevent DAG scheduler to
  mis-schedule them after these insns are declared side-effect free.
- Add test case from Michael Kuperstein <michael.m.kuperstein@intel.com>

llvm-svn: 173200
 2013-01-22 21:47:38 +00:00