commit | a4f445b28c3c55949e6be72514f4225c95dc87a9 | [log] [tgz] |
---|---|---|
author | Chris Lattner <sabre@nondot.org> | Mon Mar 10 23:23:04 2003 +0000 |
committer | Chris Lattner <sabre@nondot.org> | Mon Mar 10 23:23:04 2003 +0000 |
tree | 046b318be80530803dfa7942e0cd859332f4cdcc | |
parent | 533741a76416f2201252d0210babc64b2a7c904a [diff] |
Implement: -A*-B == A*B git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5740 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 79a551f..067a884 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -342,6 +342,10 @@ } } + if (Value *Op0v = dyn_castNegVal(Op0)) // -X * -Y = X*Y + if (Value *Op1v = dyn_castNegVal(I.getOperand(1))) + return BinaryOperator::create(Instruction::Mul, Op0v, Op1v); + return Changed ? &I : 0; }