[turbofan]: Micro optimizations to lea[l/q] on ia32/x64

src/compiler/ia32/code-generator-ia32.cc

Index: src/compiler/ia32/code-generator-ia32.cc
diff --git a/src/compiler/ia32/code-generator-ia32.cc b/src/compiler/ia32/code-generator-ia32.cc
index 428570a8c831878a053c2b445b5617071208af07..cca42fa2fd6d6a82b65d89819f3f0e17538151b5 100644
--- a/src/compiler/ia32/code-generator-ia32.cc
+++ b/src/compiler/ia32/code-generator-ia32.cc
@@ -1461,7 +1461,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
           if (i.InputRegister(1).is(i.OutputRegister())) {
             __ shl(i.OutputRegister(), 1);
           } else {
-            __ lea(i.OutputRegister(), i.MemoryOperand());
+            __ add(i.OutputRegister(), i.InputRegister(1));
           }
         } else if (mode == kMode_M2) {
           __ shl(i.OutputRegister(), 1);
@@ -1472,6 +1472,9 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
         } else {
           __ lea(i.OutputRegister(), i.MemoryOperand());
         }
+      } else if (mode == kMode_MR1 &&
+                 i.InputRegister(1).is(i.OutputRegister())) {
+        __ add(i.OutputRegister(), i.InputRegister(0));
       } else {
         __ lea(i.OutputRegister(), i.MemoryOperand());
       }