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Author SHA1 Message Date
Manman Ren f0499ba991 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: 180745
 2013-04-29 22:58:55 +00:00
Benjamin Kramer 70671b9937 Remove the old CodePlacementOpt pass. 
It was superseded by MachineBlockPlacement and disabled by default since LLVM 3.1.

llvm-svn: 178349
 2013-03-29 17:14:24 +00:00
Jakob Stoklund Olesen f2390e8303 Pass the right sign to TLI->isLegalICmpImmediate. 
LSR can fold three addressing modes into its ICmpZero node:

  ICmpZero BaseReg + Offset      => ICmp BaseReg, -Offset
  ICmpZero -1*ScaleReg + Offset  => ICmp ScaleReg, Offset
  ICmpZero BaseReg + -1*ScaleReg => ICmp BaseReg, ScaleReg

The first two cases are only used if TLI->isLegalICmpImmediate() likes
the offset.

Make sure the right Offset sign is passed to this method in the second
case. The ARM version is not symmetric.

<rdar://problem/11184260>

llvm-svn: 154079
 2012-04-05 03:10:56 +00:00
Jakob Stoklund Olesen 0a5b72f0e4 Implement ARMBaseInstrInfo::commuteInstruction() for MOVCCr. 
A MOVCCr instruction can be commuted by inverting the condition. This
can help reduce register pressure and remove unnecessary copies in some
cases.

<rdar://problem/11182914>

llvm-svn: 154033
 2012-04-04 18:23:42 +00:00