commit 3217b6c66195ba593c9caa428c1c911f85998f00
author Dinesh Dwivedi <dinesh.d@samsung.com> Fri Jun 06 06:54:45 2014 +0000
committer Dinesh Dwivedi <dinesh.d@samsung.com> Fri Jun 06 06:54:45 2014 +0000
tree b8d79e9e2c10cd82414cfe7dc2b5251b797c0c12
parent 6ae079ee4ae0b33c393de1b2a16e70d2ae57a35a

Added select flavour for ABS and NEG(ABS)

This patch can identify 
  ABS(X) ==> (X >s 0) ? X : -X and (X >s -1) ? X : -X
  ABS(X) ==> (X <s 0) ? -X : X and (X <s 1) ? -X : X
  NABS(X) ==> (X >s 0) ? -X : X and (X >s -1) ? -X : X
  NABS(X) ==> (X <s 0) ? X : -X and (X <s 1) ? X : -X
  
and can transform
  ABS(ABS(X)) -> ABS(X)
  NABS(NABS(X)) -> NABS(X)
  
Differential Revision: http://reviews.llvm.org/D3658

llvm-svn: 210312

llvm/lib/Transforms/InstCombine/InstCombine.h

diff --git a/llvm/lib/Transforms/InstCombine/InstCombine.h b/llvm/lib/Transforms/InstCombine/InstCombine.h
index e04b1be..ea1839c 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombine.h
+++ b/llvm/lib/Transforms/InstCombine/InstCombine.h
@@ -37,8 +37,9 @@
   SPF_SMIN,
   SPF_UMIN,
   SPF_SMAX,
-  SPF_UMAX
-  // SPF_ABS - TODO.
+  SPF_UMAX,
+  SPF_ABS,
+  SPF_NABS
 };
 
 /// getComplexity:  Assign a complexity or rank value to LLVM Values...