[Turbofan] Make operand canonicalization distinguish between FP types.

src/compiler/gap-resolver.cc

Index: src/compiler/gap-resolver.cc
diff --git a/src/compiler/gap-resolver.cc b/src/compiler/gap-resolver.cc
index 9403d35f06160c6e2d50a75838dbbda811cfe7de..7c397002cb59e6c51efcfebd896a70561448d4c0 100644
--- a/src/compiler/gap-resolver.cc
+++ b/src/compiler/gap-resolver.cc
@@ -75,7 +75,7 @@ void GapResolver::PerformMove(ParallelMove* moves, MoveOperands* move) const {
   // This move's source may have changed due to swaps to resolve cycles and so
   // it may now be the last move in the cycle.  If so remove it.
   InstructionOperand source = move->source();
-  if (source.EqualsCanonicalized(destination)) {
+  if (source.InterferesWith(destination)) {

[bbudge, 2016/06/14 23:34:24]

This is necessary to avoid an assert on line 95, but the comment implies that
source and destination should be the same type (since it's a move cycle and
moves have a single rep for src and dst). However, that doesn't seem to be what
happens at run time.

     move->Eliminate();
     return;
   }