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15 Commits

Author SHA1 Message Date
Bob Wilson 01fcdaa7f5 Fix PR7096. When a block containing multiple defs is tail duplicated, the 
SSAUpdater for the value from the first def may see uses of undefined values,
because the later defs will not have been updated yet.

llvm-svn: 103407
 2010-05-10 17:14:26 +00:00
Bob Wilson d1b38e317d Combine the implementations of the core part of the SSAUpdater and 
MachineSSAUpdater to avoid duplicating all the code.

llvm-svn: 103060
 2010-05-04 23:18:19 +00:00
Bob Wilson d561daf520 Update MachineSSAUpdater with the same changes I made for the IR-level 
SSAUpdater.  I'm going to try to refactor this to share most of the code
between them.

llvm-svn: 102353
 2010-04-26 17:40:49 +00:00
Chris Lattner bd009d6d6d stop using DebugLoc::getUnknownLoc() 
llvm-svn: 100215
 2010-04-02 20:17:23 +00:00
Chris Lattner c9505b68c8 fix missing #includes. 
llvm-svn: 95745
 2010-02-10 01:17:36 +00:00
Chris Lattner b06015aa69 move target-independent opcodes out of TargetInstrInfo 
into TargetOpcodes.h.  #include the new TargetOpcodes.h
into MachineInstr.  Add new inline accessors (like isPHI())
to MachineInstr, and start using them throughout the 
codebase.

llvm-svn: 95687
 2010-02-09 19:54:29 +00:00
David Greene 646aacb097 Change errs() to dbgs(). 
llvm-svn: 92548
 2010-01-05 00:10:05 +00:00
Evan Cheng fb1654d467 Watch out for duplicated PHI instructions. 
llvm-svn: 90816
 2009-12-07 23:11:03 +00:00
Evan Cheng cc77062194 Pre-regalloc tale duplication. Work in progress. 
llvm-svn: 90759
 2009-12-07 10:15:19 +00:00
Evan Cheng 92c310cb79 If BB is empty, insert PHI before end() instead of front(). 
llvm-svn: 90744
 2009-12-07 03:07:01 +00:00
Evan Cheng 0f1cc35c65 Don't try to be cute with undef optimization here. Let ProcessImplicitDefs handle it. 
llvm-svn: 90566
 2009-12-04 09:23:37 +00:00
Evan Cheng e156f611ab - If the reaching definition is an undef and the use is a PHI, add the implicit_def to the end of the source block. 
- When reaching value is replaced with another, update the cache as well.

llvm-svn: 90501
 2009-12-04 00:09:05 +00:00
Evan Cheng b2c1529d8f Handle undef values properly. 
llvm-svn: 90489
 2009-12-03 21:51:55 +00:00
Evan Cheng 7145382389 Fill out codegen SSA updater. It's not yet tested. 
llvm-svn: 90395
 2009-12-03 02:31:43 +00:00
Evan Cheng 20e9d030c9 Skeleton for MachineInstr level SSA updater. 
llvm-svn: 90353
 2009-12-02 22:02:52 +00:00