[Reassociate] Canonicalize the operands of all binary operators.
llvm-svn: 222008
diff --git a/llvm/lib/Transforms/Scalar/Reassociate.cpp b/llvm/lib/Transforms/Scalar/Reassociate.cpp
index 67659bb..30e9b88 100644
--- a/llvm/lib/Transforms/Scalar/Reassociate.cpp
+++ b/llvm/lib/Transforms/Scalar/Reassociate.cpp
@@ -2078,19 +2078,19 @@
if (Instruction *Res = canonicalizeNegConstExpr(I))
I = Res;
- // Commute floating point binary operators, to canonicalize the order of their
- // operands. This can potentially expose more CSE opportunities, and makes
- // writing other transformations simpler.
- if (I->getType()->isFloatingPointTy() || I->getType()->isVectorTy()) {
+ // Commute binary operators, to canonicalize the order of their operands.
+ // This can potentially expose more CSE opportunities, and makes writing other
+ // transformations simpler.
+ if (I->isCommutative())
+ canonicalizeOperands(I);
- if (I->isCommutative())
- canonicalizeOperands(I);
+ // Don't optimize vector instructions.
+ if (I->getType()->isVectorTy())
+ return;
- // Don't try to optimize vector instructions or anything that doesn't have
- // unsafe algebra.
- if (I->getType()->isVectorTy() || !I->hasUnsafeAlgebra())
- return;
- }
+ // Don't optimize floating point instructions that don't have unsafe algebra.
+ if (I->getType()->isFloatingPointTy() && !I->hasUnsafeAlgebra())
+ return;
// Do not reassociate boolean (i1) expressions. We want to preserve the
// original order of evaluation for short-circuited comparisons that