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In SCEVAddExpr::get, skip over any cast operands before looking for nested

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add operands after constant operands. The recent change to recognize
sign-extend expressions caused this to be exposed more often.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37628 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2007-06-18 19:30:09 +00:00
parent 03265f98a3
commit f50cd749e1
1 changed files with 5 additions and 2 deletions
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7
lib/Analysis/ScalarEvolution.cpp
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@ -685,8 +685,11 @@ SCEVHandle SCEVAddExpr::get(std::vector<SCEVHandle> &Ops) {
return SCEVAddExpr::get(Ops); return SCEVAddExpr::get(Ops);
} }
// Okay, now we know the first non-constant operand. If there are add // Now we know the first non-constant operand. Skip past any cast SCEVs.
// operands they would be next. while (Idx < Ops.size() && Ops[Idx]->getSCEVType() < scAddExpr)
++Idx;
// If there are add operands they would be next.
if (Idx < Ops.size()) { if (Idx < Ops.size()) {
bool DeletedAdd = false; bool DeletedAdd = false;
while (SCEVAddExpr *Add = dyn_cast<SCEVAddExpr>(Ops[Idx])) { while (SCEVAddExpr *Add = dyn_cast<SCEVAddExpr>(Ops[Idx])) {