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3 Commits

Author SHA1 Message Date
Sanjoy Das
eeca9f6fd4 [SCEV] Commute zero extends through <nuw> additions 
llvm-svn: 251052
 2015-10-22 19:57:38 +00:00
Sanjoy Das
a060e602fd [SCEV] Commute sign extends through nsw additions 
Summary: Depends on D13613.

Reviewers: atrick, hfinkel, reames, nlewycky

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D13685

llvm-svn: 251049
 2015-10-22 19:57:25 +00:00
Sanjoy Das
8f27415c05 [SCEV] Mark AddExprs as nsw or nuw if legal 
Summary:
This uses `ScalarEvolution::getRange` and not potentially control
dependent `nsw` and `nuw` bits on the arithmetic instruction.

Reviewers: atrick, hfinkel, nlewycky

Subscribers: llvm-commits, sanjoy

Differential Revision: http://reviews.llvm.org/D13613

llvm-svn: 251048
 2015-10-22 19:57:19 +00:00