Add inlining for old optimizer.

test/cmdlineTests/optimizer_inliner_call_from_constructor/args

@@ -0,0 +1 @@
+--optimize --asm --metadata-hash none

test/cmdlineTests/optimizer_inliner_call_from_constructor/input.sol

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity >=0.0;
+
+contract C {
+    uint x;
+    constructor() { x = a(); }
+    function a() public pure returns (uint) { return f(); } // this should be inlined
+    function f() internal pure returns (uint) { return 6; }
+}

test/cmdlineTests/optimizer_inliner_call_from_constructor/output

@@ -0,0 +1,80 @@
+
+======= optimizer_inliner_call_from_constructor/input.sol:C =======
+EVM assembly:
+    /* "optimizer_inliner_call_from_constructor/input.sol":60:263  contract C {... */
+  mstore(0x40, 0x80)
+    /* "optimizer_inliner_call_from_constructor/input.sol":89:115  constructor() { x = a(); } */
+  callvalue
+  dup1
+  iszero
+  tag_1
+  jumpi
+  0x00
+  dup1
+  revert
+tag_1:
+  pop
+    /* "optimizer_inliner_call_from_constructor/input.sol":257:258  6 */
+  0x06
+    /* "optimizer_inliner_call_from_constructor/input.sol":105:106  x */
+  0x00
+    /* "optimizer_inliner_call_from_constructor/input.sol":105:112  x = a() */
+  sstore
+    /* "optimizer_inliner_call_from_constructor/input.sol":60:263  contract C {... */
+  dataSize(sub_0)
+  dup1
+  dataOffset(sub_0)
+  0x00
+  codecopy
+  0x00
+  return
+stop
+
+sub_0: assembly {
+        /* "optimizer_inliner_call_from_constructor/input.sol":60:263  contract C {... */
+      mstore(0x40, 0x80)
+      callvalue
+      dup1
+      iszero
+      tag_1
+      jumpi
+      0x00
+      dup1
+      revert
+    tag_1:
+      pop
+      jumpi(tag_2, lt(calldatasize, 0x04))
+      shr(0xe0, calldataload(0x00))
+      dup1
+      0x0dbe671f
+      eq
+      tag_3
+      jumpi
+    tag_2:
+      0x00
+      dup1
+      revert
+        /* "optimizer_inliner_call_from_constructor/input.sol":120:175  function a() public pure returns (uint) { return f(); } */
+    tag_3:
+        /* "optimizer_inliner_call_from_constructor/input.sol":257:258  6 */
+      0x06
+        /* "optimizer_inliner_call_from_constructor/input.sol":120:175  function a() public pure returns (uint) { return f(); } */
+      mload(0x40)
+        /* "#utility.yul":160:185   */
+      swap1
+      dup2
+      mstore
+        /* "#utility.yul":148:150   */
+      0x20
+        /* "#utility.yul":133:151   */
+      add
+        /* "optimizer_inliner_call_from_constructor/input.sol":120:175  function a() public pure returns (uint) { return f(); } */
+      mload(0x40)
+      dup1
+      swap2
+      sub
+      swap1
+      return
+
+    auxdata: <AUXDATA REMOVED>
+}