maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
75,599 Commits 23 Branches 0 Tags 2.2 GiB
Commit Graph

19 Commits

Author SHA1 Message Date
Chris Lattner 9242ae047c mplement a theoretical fixme. 
llvm-svn: 93024
 2010-01-08 19:28:47 +00:00
Chris Lattner 10840e9e13 rename CanEvaluateInDifferentType -> CanEvaluateTruncated and 
simplify it now that it is only used for truncates.

llvm-svn: 93021
 2010-01-08 19:19:23 +00:00
Chris Lattner 3057c37959 Enhance instcombine to reason more strongly about promoting computation 
that feeds into a zext, similar to the patch I did yesterday for sext.
There is a lot of room for extension beyond this patch.

llvm-svn: 92962
 2010-01-07 23:41:00 +00:00
Chris Lattner 4339f2abdb tweaks suggested by Duncan 
llvm-svn: 92824
 2010-01-06 05:32:15 +00:00
Chris Lattner 98748c0964 Teach instcombine's sext elimination logic to be more aggressive. 
Previously, instcombine would only promote an expression tree to
the larger type if doing so eliminated two casts.  This is because
a need to manually do the sign extend after the promoted expression
tree with two shifts.  Now, we keep track of whether the result of
the computation is going to be properly sign extended already.  If
so, we can unconditionally promote the expression, which allows us
to zap more sext's.

This implements rdar://6598839 (aka gcc pr38751)

llvm-svn: 92815
 2010-01-06 01:56:21 +00:00
Chris Lattner 8600dd3d7c simplify this code. 
llvm-svn: 92800
 2010-01-05 23:00:30 +00:00
Chris Lattner 554d0564ff make this a static function instead of a method. 
llvm-svn: 92795
 2010-01-05 22:30:42 +00:00
Chris Lattner a93c63c22d more rearrangement and cleanup, fix my test failure. 
llvm-svn: 92792
 2010-01-05 22:21:18 +00:00
Chris Lattner f476ef502c cleanup 
llvm-svn: 92790
 2010-01-05 22:07:33 +00:00
Chris Lattner f88dd5ed64 remove two trunc xforms that are subsumed by EvaluateInDifferentType. 
The only difference is that EvaluateInDifferentType checks to ensure
they are profitable before doing them :)

llvm-svn: 92788
 2010-01-05 22:01:41 +00:00
Chris Lattner 44a63815b9 just remove this xform which is subsumed by others. 
llvm-svn: 92775
 2010-01-05 21:16:30 +00:00
Chris Lattner b82a840eb2 move a trunc-specific transform out of commonIntCastTransforms into visitTrunc. 
llvm-svn: 92773
 2010-01-05 21:11:17 +00:00
Chris Lattner fd7e42b65d move a zext specific xform out of commonIntCastTransforms into visitZExt and modernize it. 
llvm-svn: 92770
 2010-01-05 21:04:47 +00:00
Chris Lattner aaccc8de62 move a trunc-specific xform out of commonIntCastTransforms into visitTrunc 
llvm-svn: 92768
 2010-01-05 20:57:30 +00:00
Benjamin Kramer a81a6dff0d Convert a ton of simple integer type equality tests to the new predicate. 
llvm-svn: 92760
 2010-01-05 20:07:06 +00:00
Benjamin Kramer ccce8bae14 Avoid going through the LLVMContext for type equality where it's safe to dereference the type pointer. 
llvm-svn: 92726
 2010-01-05 13:12:22 +00:00
Chris Lattner 59d95743c8 move some more cast-related stuff 
llvm-svn: 92471
 2010-01-04 07:59:07 +00:00
Chris Lattner 92be2adba6 move the [Can]EvaluateInDifferentType functions out to InstCombineCasts.cpp 
llvm-svn: 92469
 2010-01-04 07:54:59 +00:00
Chris Lattner 2b295a0eba split 943 lines of instcombine out to a new InstCombineCasts.cpp 
file.  InstructionCombining.cpp is now down to a svelte 9300 lines :)

llvm-svn: 92468
 2010-01-04 07:53:58 +00:00