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Don't make TwoToExp signed by default.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60279 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2008-11-30 05:29:33 +00:00
parent f0e44c4d7a
commit 3f93df5733
1 changed files with 1 additions and 2 deletions
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3
lib/Transforms/Scalar/InstructionCombining.cpp
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@@ -2960,8 +2960,7 @@ Instruction *InstCombiner::visitSDiv(BinaryOperator &I) {
APInt RHSNegAPI(RHSNeg->getBitWidth(), RHSNeg->getSExtValue(), true); APInt RHSNegAPI(RHSNeg->getBitWidth(), RHSNeg->getSExtValue(), true);
APInt NegOne = -APInt(RHSNeg->getBitWidth(), 1, true); APInt NegOne = -APInt(RHSNeg->getBitWidth(), 1, true);
APInt TwoToExp(RHSNeg->getBitWidth(), 1 << (RHSNeg->getBitWidth() - 1), APInt TwoToExp(RHSNeg->getBitWidth(), 1 << (RHSNeg->getBitWidth() - 1));
true);
// -X/C -> X/-C, if and only if negation doesn't overflow. // -X/C -> X/-C, if and only if negation doesn't overflow.
if ((RHS->getSExtValue() < 0 && RHSNegAPI.slt(TwoToExp - 1)) || if ((RHS->getSExtValue() < 0 && RHSNegAPI.slt(TwoToExp - 1)) ||