llvm-project

Commit Graph

Author	SHA1	Message	Date
Benjamin Kramer	b50682e156	Add missing colons to check lines. llvm-svn: 179277	2013-04-11 12:41:41 +00:00
Michael Ilseman	bb6f691b01	Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included. fsub X, +0 ==> X fsub X, -0 ==> X, when we know X is not -0 fsub +/-0.0, (fsub -0.0, X) ==> X fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X fsub nnan ninf X, X ==> 0.0 fadd nsz X, 0 ==> X fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0 where nnan and ninf have to occur at least once somewhere in this expression fmul X, 1.0 ==> X llvm-svn: 169940	2012-12-12 00:27:46 +00:00

Author

SHA1

Message

Date

Benjamin Kramer

b50682e156

Add missing colons to check lines.

llvm-svn: 179277

2013-04-11 12:41:41 +00:00

Michael Ilseman

bb6f691b01

Added a slew of SimplifyInstruction floating-point optimizations, many of which take advantage of fast-math flags. Test cases included.

fsub X, +0 ==> X
  fsub X, -0 ==> X, when we know X is not -0
  fsub +/-0.0, (fsub -0.0, X) ==> X
  fsub nsz +/-0.0, (fsub +/-0.0, X) ==> X
  fsub nnan ninf X, X ==> 0.0
  fadd nsz X, 0 ==> X
  fadd [nnan ninf] X, (fsub [nnan ninf] 0, X) ==> 0
    where nnan and ninf have to occur at least once somewhere in this expression
  fmul X, 1.0 ==> X

llvm-svn: 169940

2012-12-12 00:27:46 +00:00

2 Commits