Vectorizer: track non-fast FP instructions through phis when finding reductions.
When we traced through a phi node looking for floating-point reductions, we
forgot whether we'd ever seen an instruction without fast-math flags (that
would block vectorization). This propagates it through to the end.
llvm-svn: 271015
diff --git a/llvm/lib/Transforms/Utils/LoopUtils.cpp b/llvm/lib/Transforms/Utils/LoopUtils.cpp
index f2f9bae..e77ab2a 100644
--- a/llvm/lib/Transforms/Utils/LoopUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUtils.cpp
@@ -430,7 +430,7 @@
default:
return InstDesc(false, I);
case Instruction::PHI:
- return InstDesc(I, Prev.getMinMaxKind());
+ return InstDesc(I, Prev.getMinMaxKind(), Prev.getUnsafeAlgebraInst());
case Instruction::Sub:
case Instruction::Add:
return InstDesc(Kind == RK_IntegerAdd, I);