Aggressive LEA

Convert adds with a constant operand to lea on -aggressive-lea

BUG=none
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/2135403002 .

src/IceInstX86BaseImpl.h

diff --git a/src/IceInstX86BaseImpl.h b/src/IceInstX86BaseImpl.h
index cfc36d4..4b9ea41 100644
--- a/src/IceInstX86BaseImpl.h
+++ b/src/IceInstX86BaseImpl.h
@@ -2025,6 +2025,11 @@
 void InstImpl<TraitsType>::InstX86Lea::emit(const Cfg *Func) const {
   if (!BuildDefs::dump())
     return;
+  if (auto *Add = this->deoptLeaToAddOrNull(Func)) {
+    Add->emit(Func);
+    return;
+  }
+
   Ostream &Str = Func->getContext()->getStrEmit();
   assert(this->getSrcSize() == 1);
   assert(this->getDest()->hasReg());