[turbofan] Fix deoptimization from array literal spread.

test/mjsunit/regress/regress-osr-in-literal.js

Index: test/mjsunit/regress/regress-osr-in-literal.js
diff --git a/test/mjsunit/regress/regress-osr-in-literal.js b/test/mjsunit/regress/regress-osr-in-literal.js
index cdb50f1af9a527a28a256f61dcfb963a4b508778..7553b9c725bab07f4160cc6eb06e897e12d67249 100644
--- a/test/mjsunit/regress/regress-osr-in-literal.js
+++ b/test/mjsunit/regress/regress-osr-in-literal.js
@@ -17,6 +17,7 @@ var testCases = [
   { s:"{ [do { _OSR_ 'b' }]: 3 }",                   r:{ b:3 } },
   { s:"{ [do { _OSR_ 'b' }]: 3, c: 4 }",             r:{ b:3, c:4 } },
   { s:"{ [do { _OSR_ 'b' }]: 3, __proto__:p }",      r:{ b:3, __proto__:p } },
+  { s:"{ get [do { _OSR_ 'c' }]() { return 4; } }",  r:{ c:4 } },
   { s:"class { [do { _OSR_ 'f' }]() {} }" },
   { s:"class { [do { _OSR_ 'f' }]() {}; g() {} }" },
 ];