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Add completely hokey binary-and and binary-or operations to ConstantRange and

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teach LazyValueInfo to use them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113196 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky
2010-09-07 05:39:02 +00:00
parent 2b6c01b40b
commit 198381e542
3 changed files with 40 additions and 0 deletions
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6
lib/Analysis/LazyValueInfo.cpp
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@@ -602,6 +602,12 @@ LVILatticeVal LVIQuery::getBlockValue(BasicBlock *BB) {
case Instruction::BitCast:
Result.markConstantRange(LHSRange);
break;
case Instruction::And:
Result.markConstantRange(LHSRange.binaryAnd(RHSRange));
break;
case Instruction::Or:
Result.markConstantRange(LHSRange.binaryOr(RHSRange));
break;
// Unhandled instructions are overdefined.
default: