6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-12 17:32:19 +00:00
Code Issues Projects Releases Wiki Activity

Add some comments.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80452 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-08-29 23:36:57 +00:00
parent f8a87e8343
commit ed77e52dd9
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
lib/Analysis/ScalarEvolutionAliasAnalysis.cpp
View File

@ -69,9 +69,14 @@ ScalarEvolutionAliasAnalysis::runOnFunction(Function &F) {
return false;
}
/// GetUnderlyingIdentifiedObject - Given an expression, try to find an
/// "identified object" (see AliasAnalysis::isIdentifiedObject) base
/// value. Return null is none was found.
Value *
ScalarEvolutionAliasAnalysis::GetUnderlyingIdentifiedObject(const SCEV *S) {
if (const SCEVAddRecExpr *AR = dyn_cast<SCEVAddRecExpr>(S)) {
// In an addrec, assume that the base will be in the start, rather
// than the step.
return GetUnderlyingIdentifiedObject(AR->getStart());
} else if (const SCEVAddExpr *A = dyn_cast<SCEVAddExpr>(S)) {
// If there's a pointer operand, it'll be sorted at the end of the list.