maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

whitespace 

llvm-svn: 195711
This commit is contained in:
Andrew Trick 2013-11-26 02:03:20 +00:00
parent 62c5b5713c
commit d3ab37cfeb
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
llvm/lib/Target/X86/X86ISelLowering.cpp
View File

@ -17943,12 +17943,12 @@ static SDValue PerformOrCombine(SDNode *N, SelectionDAG &DAG,
MachineFunction &MF = DAG.getMachineFunction();
bool OptForSize = MF.getFunction()->getAttributes().
hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
// SHLD/SHRD instructions have lower register pressure, but on some
// platforms they have higher latency than the equivalent
// series of shifts/or that would otherwise be generated.
// SHLD/SHRD instructions have lower register pressure, but on some
// platforms they have higher latency than the equivalent
// series of shifts/or that would otherwise be generated.
// Don't fold (or (x << c) | (y >> (64 - c))) if SHLD/SHRD instructions
// have higer latencies and we are not optimizing for size.
// have higher latencies and we are not optimizing for size.
if (!OptForSize && Subtarget->isSHLDSlow())
return SDValue();